diff options
Diffstat (limited to 'drivers/iio')
64 files changed, 4453 insertions, 545 deletions
diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig index a918270d6f54..b3c8c6ef0dff 100644 --- a/drivers/iio/Kconfig +++ b/drivers/iio/Kconfig @@ -83,6 +83,7 @@ source "drivers/iio/humidity/Kconfig" source "drivers/iio/imu/Kconfig" source "drivers/iio/light/Kconfig" source "drivers/iio/magnetometer/Kconfig" +source "drivers/iio/multiplexer/Kconfig" source "drivers/iio/orientation/Kconfig" if IIO_TRIGGER source "drivers/iio/trigger/Kconfig" diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile index 33fa4026f92c..93c769cd99bf 100644 --- a/drivers/iio/Makefile +++ b/drivers/iio/Makefile @@ -28,6 +28,7 @@ obj-y += humidity/ obj-y += imu/ obj-y += light/ obj-y += magnetometer/ +obj-y += multiplexer/ obj-y += orientation/ obj-y += potentiometer/ obj-y += potentiostat/ diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c index 43a6cb078193..2238a26aba63 100644 --- a/drivers/iio/accel/hid-sensor-accel-3d.c +++ b/drivers/iio/accel/hid-sensor-accel-3d.c @@ -347,7 +347,7 @@ static int accel_3d_parse_report(struct platform_device *pdev, static int hid_accel_3d_probe(struct platform_device *pdev) { int ret = 0; - static const char *name; + const char *name; struct iio_dev *indio_dev; struct accel_3d_state *accel_state; const struct iio_chan_spec *channel_spec; diff --git a/drivers/iio/accel/mma9551.c b/drivers/iio/accel/mma9551.c index bf2704435629..1f53f08476f5 100644 --- a/drivers/iio/accel/mma9551.c +++ b/drivers/iio/accel/mma9551.c @@ -27,7 +27,6 @@ #define MMA9551_DRV_NAME "mma9551" #define MMA9551_IRQ_NAME "mma9551_event" -#define MMA9551_GPIO_NAME "mma9551_int" #define MMA9551_GPIO_COUNT 4 /* Tilt application (inclination in IIO terms). */ @@ -418,8 +417,7 @@ static int mma9551_gpio_probe(struct iio_dev *indio_dev) struct device *dev = &data->client->dev; for (i = 0; i < MMA9551_GPIO_COUNT; i++) { - gpio = devm_gpiod_get_index(dev, MMA9551_GPIO_NAME, i, - GPIOD_IN); + gpio = devm_gpiod_get_index(dev, NULL, i, GPIOD_IN); if (IS_ERR(gpio)) { dev_err(dev, "acpi gpio get index failed\n"); return PTR_ERR(gpio); diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index 784670e2736b..07d1489cd457 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -710,6 +710,8 @@ static const struct iio_trigger_ops st_accel_trigger_ops = { int st_accel_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *adata = iio_priv(indio_dev); + struct st_sensors_platform_data *pdata = + (struct st_sensors_platform_data *)adata->dev->platform_data; int irq = adata->get_irq_data_ready(indio_dev); int err; @@ -736,9 +738,8 @@ int st_accel_common_probe(struct iio_dev *indio_dev) &adata->sensor_settings->fs.fs_avl[0]; adata->odr = adata->sensor_settings->odr.odr_avl[0].hz; - if (!adata->dev->platform_data) - adata->dev->platform_data = - (struct st_sensors_platform_data *)&default_accel_pdata; + if (!pdata) + pdata = (struct st_sensors_platform_data *)&default_accel_pdata; err = st_sensors_init_sensor(indio_dev, adata->dev->platform_data); if (err < 0) diff --git a/drivers/iio/accel/st_accel_spi.c b/drivers/iio/accel/st_accel_spi.c index 29a15f27a51b..1a867f5563a4 100644 --- a/drivers/iio/accel/st_accel_spi.c +++ b/drivers/iio/accel/st_accel_spi.c @@ -47,15 +47,11 @@ static int st_accel_spi_remove(struct spi_device *spi) } static const struct spi_device_id st_accel_id_table[] = { - { LSM303DLH_ACCEL_DEV_NAME }, - { LSM303DLHC_ACCEL_DEV_NAME }, { LIS3DH_ACCEL_DEV_NAME }, { LSM330D_ACCEL_DEV_NAME }, { LSM330DL_ACCEL_DEV_NAME }, { LSM330DLC_ACCEL_DEV_NAME }, { LIS331DLH_ACCEL_DEV_NAME }, - { LSM303DL_ACCEL_DEV_NAME }, - { LSM303DLM_ACCEL_DEV_NAME }, { LSM330_ACCEL_DEV_NAME }, { LSM303AGR_ACCEL_DEV_NAME }, { LIS2DH12_ACCEL_DEV_NAME }, diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 401f47b51d83..614fa41559b1 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -679,6 +679,18 @@ config TI_ADC0832 This driver can also be built as a module. If so, the module will be called ti-adc0832. +config TI_ADC084S021 + tristate "Texas Instruments ADC084S021" + depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + If you say yes here you get support for Texas Instruments ADC084S021 + chips. + + This driver can also be built as a module. If so, the module will be + called ti-adc084s021. + config TI_ADC12138 tristate "Texas Instruments ADC12130/ADC12132/ADC12138" depends on SPI @@ -691,6 +703,18 @@ config TI_ADC12138 This driver can also be built as a module. If so, the module will be called ti-adc12138. +config TI_ADC108S102 + tristate "Texas Instruments ADC108S102 and ADC128S102 driver" + depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Say yes here to build support for Texas Instruments ADC108S102 and + ADC128S102 ADC. + + To compile this driver as a module, choose M here: the module will + be called ti-adc108s102. + config TI_ADC128S052 tristate "Texas Instruments ADC128S052/ADC122S021/ADC124S021" depends on SPI diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 9339bec4babe..b546736a5541 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -62,7 +62,9 @@ obj-$(CONFIG_STM32_ADC_CORE) += stm32-adc-core.o obj-$(CONFIG_STM32_ADC) += stm32-adc.o obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o obj-$(CONFIG_TI_ADC0832) += ti-adc0832.o +obj-$(CONFIG_TI_ADC084S021) += ti-adc084s021.o obj-$(CONFIG_TI_ADC12138) += ti-adc12138.o +obj-$(CONFIG_TI_ADC108S102) += ti-adc108s102.o obj-$(CONFIG_TI_ADC128S052) += ti-adc128s052.o obj-$(CONFIG_TI_ADC161S626) += ti-adc161s626.o obj-$(CONFIG_TI_ADS1015) += ti-ads1015.o diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c index 1817ebf5ad84..34e353c43ac8 100644 --- a/drivers/iio/adc/ad7791.c +++ b/drivers/iio/adc/ad7791.c @@ -272,11 +272,9 @@ static ssize_t ad7791_write_frequency(struct device *dev, struct ad7791_state *st = iio_priv(indio_dev); int i, ret; - for (i = 0; i < ARRAY_SIZE(ad7791_sample_freq_avail); i++) - if (sysfs_streq(ad7791_sample_freq_avail[i], buf)) - break; - if (i == ARRAY_SIZE(ad7791_sample_freq_avail)) - return -EINVAL; + i = sysfs_match_string(ad7791_sample_freq_avail, buf); + if (i < 0) + return i; ret = iio_device_claim_direct_mode(indio_dev); if (ret) diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c index 62670cbfa2bb..e0ea411a0b2d 100644 --- a/drivers/iio/adc/aspeed_adc.c +++ b/drivers/iio/adc/aspeed_adc.c @@ -212,7 +212,10 @@ static int aspeed_adc_probe(struct platform_device *pdev) } /* Start all channels in normal mode. */ - clk_prepare_enable(data->clk_scaler->clk); + ret = clk_prepare_enable(data->clk_scaler->clk); + if (ret) + goto clk_enable_error; + adc_engine_control_reg_val = GENMASK(31, 16) | ASPEED_OPERATION_MODE_NORMAL | ASPEED_ENGINE_ENABLE; writel(adc_engine_control_reg_val, @@ -236,6 +239,7 @@ iio_register_error: writel(ASPEED_OPERATION_MODE_POWER_DOWN, data->base + ASPEED_REG_ENGINE_CONTROL); clk_disable_unprepare(data->clk_scaler->clk); +clk_enable_error: clk_hw_unregister_divider(data->clk_scaler); scaler_error: diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c index 62d37f8725b8..6e419d5a7c14 100644 --- a/drivers/iio/adc/cpcap-adc.c +++ b/drivers/iio/adc/cpcap-adc.c @@ -52,6 +52,10 @@ #define CPCAP_BIT_RAND0 BIT(1) /* Set with CAL_MODE */ #define CPCAP_BIT_ADEN BIT(0) /* Currently unused */ +#define CPCAP_REG_ADCC1_DEFAULTS (CPCAP_BIT_ADEN_AUTO_CLR | \ + CPCAP_BIT_ADC_CLK_SEL0 | \ + CPCAP_BIT_RAND1) + /* Register CPCAP_REG_ADCC2 bits */ #define CPCAP_BIT_CAL_FACTOR_ENABLE BIT(15) /* Currently unused */ #define CPCAP_BIT_BATDETB_EN BIT(14) /* Currently unused */ @@ -62,7 +66,7 @@ #define CPCAP_BIT_ADC_PS_FACTOR0 BIT(9) #define CPCAP_BIT_AD4_SELECT BIT(8) /* Currently unused */ #define CPCAP_BIT_ADC_BUSY BIT(7) /* Currently unused */ -#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Currently unused */ +#define CPCAP_BIT_THERMBIAS_EN BIT(6) /* Bias for AD0_BATTDETB */ #define CPCAP_BIT_ADTRIG_DIS BIT(5) /* Disable interrupt */ #define CPCAP_BIT_LIADC BIT(4) /* Currently unused */ #define CPCAP_BIT_TS_REFEN BIT(3) /* Currently unused */ @@ -70,6 +74,12 @@ #define CPCAP_BIT_TS_M1 BIT(1) /* Currently unused */ #define CPCAP_BIT_TS_M0 BIT(0) /* Currently unused */ +#define CPCAP_REG_ADCC2_DEFAULTS (CPCAP_BIT_AD4_SELECT | \ + CPCAP_BIT_ADTRIG_DIS | \ + CPCAP_BIT_LIADC | \ + CPCAP_BIT_TS_M2 | \ + CPCAP_BIT_TS_M1) + #define CPCAP_MAX_TEMP_LVL 27 #define CPCAP_FOUR_POINT_TWO_ADC 801 #define ST_ADC_CAL_CHRGI_HIGH_THRESHOLD 530 @@ -78,7 +88,7 @@ #define ST_ADC_CAL_BATTI_LOW_THRESHOLD 494 #define ST_ADC_CALIBRATE_DIFF_THRESHOLD 3 -#define CPCAP_ADC_MAX_RETRIES 5 /* Calibration and quirk */ +#define CPCAP_ADC_MAX_RETRIES 5 /* Calibration */ /** * struct cpcap_adc_ato - timing settings for cpcap adc @@ -124,10 +134,10 @@ struct cpcap_adc { */ enum cpcap_adc_channel { /* Bank0 channels */ - CPCAP_ADC_AD0_BATTDETB, /* Battery detection */ + CPCAP_ADC_AD0, /* Battery temperature */ CPCAP_ADC_BATTP, /* Battery voltage */ CPCAP_ADC_VBUS, /* USB VBUS voltage */ - CPCAP_ADC_AD3, /* Battery temperature when charging */ + CPCAP_ADC_AD3, /* Die temperature when charging */ CPCAP_ADC_BPLUS_AD4, /* Another battery or system voltage */ CPCAP_ADC_CHG_ISENSE, /* Calibrated charge current */ CPCAP_ADC_BATTI, /* Calibrated system current */ @@ -217,7 +227,7 @@ struct cpcap_adc_request { /* Phasing table for channels. Note that channels 16 & 17 use BATTP and BATTI */ static const struct cpcap_adc_phasing_tbl bank_phasing[] = { /* Bank0 */ - [CPCAP_ADC_AD0_BATTDETB] = {0, 0x80, 0x80, 0, 1023}, + [CPCAP_ADC_AD0] = {0, 0x80, 0x80, 0, 1023}, [CPCAP_ADC_BATTP] = {0, 0x80, 0x80, 0, 1023}, [CPCAP_ADC_VBUS] = {0, 0x80, 0x80, 0, 1023}, [CPCAP_ADC_AD3] = {0, 0x80, 0x80, 0, 1023}, @@ -243,7 +253,7 @@ static const struct cpcap_adc_phasing_tbl bank_phasing[] = { */ static struct cpcap_adc_conversion_tbl bank_conversion[] = { /* Bank0 */ - [CPCAP_ADC_AD0_BATTDETB] = { + [CPCAP_ADC_AD0] = { IIO_CHAN_INFO_PROCESSED, 0, 0, 0, 1, 1, }, [CPCAP_ADC_BATTP] = { @@ -541,6 +551,15 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, return; switch (req->channel) { + case CPCAP_ADC_AD0: + value2 |= CPCAP_BIT_THERMBIAS_EN; + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, + CPCAP_BIT_THERMBIAS_EN, + value2); + if (error) + return; + usleep_range(800, 1000); + break; case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: value1 |= CPCAP_BIT_AD_SEL1; break; @@ -583,7 +602,8 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, CPCAP_BIT_ATOX_PS_FACTOR | CPCAP_BIT_ADC_PS_FACTOR1 | - CPCAP_BIT_ADC_PS_FACTOR0, + CPCAP_BIT_ADC_PS_FACTOR0 | + CPCAP_BIT_THERMBIAS_EN, value2); if (error) return; @@ -614,27 +634,6 @@ static void cpcap_adc_setup_bank(struct cpcap_adc *ddata, } } -/* - * Occasionally the ADC does not seem to start and there will be no - * interrupt. Let's re-init interrupt to prevent the ADC from hanging - * for the next request. It is unclear why this happens, but the next - * request will usually work after doing this. - */ -static void cpcap_adc_quirk_reset_lost_irq(struct cpcap_adc *ddata) -{ - int error; - - dev_info(ddata->dev, "lost ADC irq, attempting to reinit\n"); - disable_irq(ddata->irq); - error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, - CPCAP_BIT_ADTRIG_DIS, - CPCAP_BIT_ADTRIG_DIS); - if (error) - dev_warn(ddata->dev, "%s reset failed: %i\n", - __func__, error); - enable_irq(ddata->irq); -} - static int cpcap_adc_start_bank(struct cpcap_adc *ddata, struct cpcap_adc_request *req) { @@ -652,7 +651,6 @@ static int cpcap_adc_start_bank(struct cpcap_adc *ddata, return 0; if (error == 0) { - cpcap_adc_quirk_reset_lost_irq(ddata); error = -ETIMEDOUT; continue; } @@ -664,6 +662,21 @@ static int cpcap_adc_start_bank(struct cpcap_adc *ddata, return error; } +static int cpcap_adc_stop_bank(struct cpcap_adc *ddata) +{ + int error; + + error = regmap_update_bits(ddata->reg, CPCAP_REG_ADCC1, + 0xffff, + CPCAP_REG_ADCC1_DEFAULTS); + if (error) + return error; + + return regmap_update_bits(ddata->reg, CPCAP_REG_ADCC2, + 0xffff, + CPCAP_REG_ADCC2_DEFAULTS); +} + static void cpcap_adc_phase(struct cpcap_adc_request *req) { const struct cpcap_adc_conversion_tbl *conv_tbl = req->conv_tbl; @@ -758,7 +771,7 @@ static void cpcap_adc_convert(struct cpcap_adc_request *req) return; /* Temperatures use a lookup table instead of conversion table */ - if ((req->channel == CPCAP_ADC_AD0_BATTDETB) || + if ((req->channel == CPCAP_ADC_AD0) || (req->channel == CPCAP_ADC_AD3)) { req->result = cpcap_adc_table_to_millicelcius(req->result); @@ -820,7 +833,7 @@ static int cpcap_adc_init_request(struct cpcap_adc_request *req, req->conv_tbl = bank_conversion; switch (channel) { - case CPCAP_ADC_AD0_BATTDETB ... CPCAP_ADC_USB_ID: + case CPCAP_ADC_AD0 ... CPCAP_ADC_USB_ID: req->bank_index = channel; break; case CPCAP_ADC_AD8 ... CPCAP_ADC_TSY2_AD15: @@ -839,6 +852,22 @@ static int cpcap_adc_init_request(struct cpcap_adc_request *req, return 0; } +static int cpcap_adc_read_st_die_temp(struct cpcap_adc *ddata, + int addr, int *val) +{ + int error; + + error = regmap_read(ddata->reg, addr, val); + if (error) + return error; + + *val -= 282; + *val *= 114; + *val += 25000; + + return 0; +} + static int cpcap_adc_read(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -860,6 +889,9 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, error = regmap_read(ddata->reg, chan->address, val); if (error) goto err_unlock; + error = cpcap_adc_stop_bank(ddata); + if (error) + goto err_unlock; mutex_unlock(&ddata->lock); break; case IIO_CHAN_INFO_PROCESSED: @@ -867,7 +899,19 @@ static int cpcap_adc_read(struct iio_dev *indio_dev, error = cpcap_adc_start_bank(ddata, &req); if (error) goto err_unlock; - error = cpcap_adc_read_bank_scaled(ddata, &req); + if ((ddata->vendor == CPCAP_VENDOR_ST) && + (chan->channel == CPCAP_ADC_AD3)) { + error = cpcap_adc_read_st_die_temp(ddata, + chan->address, + &req.result); + if (error) + goto err_unlock; + } else { + error = cpcap_adc_read_bank_scaled(ddata, &req); + if (error) + goto err_unlock; + } + error = cpcap_adc_stop_bank(ddata); if (error) goto err_unlock; mutex_unlock(&ddata->lock); diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c index 678e8c7ea763..adf7dc712937 100644 --- a/drivers/iio/adc/hi8435.c +++ b/drivers/iio/adc/hi8435.c @@ -105,6 +105,26 @@ static int hi8435_writew(struct hi8435_priv *priv, u8 reg, u16 val) return spi_write(priv->spi, priv->reg_buffer, 3); } +static int hi8435_read_raw(struct iio_dev *idev, + const struct iio_chan_spec *chan, + int *val, int *val2, long mask) +{ + struct hi8435_priv *priv = iio_priv(idev); + u32 tmp; + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = hi8435_readl(priv, HI8435_SO31_0_REG, &tmp); + if (ret < 0) + return ret; + *val = !!(tmp & BIT(chan->channel)); + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + static int hi8435_read_event_config(struct iio_dev *idev, const struct iio_chan_spec *chan, enum iio_event_type type, @@ -121,10 +141,21 @@ static int hi8435_write_event_config(struct iio_dev *idev, enum iio_event_direction dir, int state) { struct hi8435_priv *priv = iio_priv(idev); + int ret; + u32 tmp; + + if (state) { + ret = hi8435_readl(priv, HI8435_SO31_0_REG, &tmp); + if (ret < 0) + return ret; + if (tmp & BIT(chan->channel)) + priv->event_prev_val |= BIT(chan->channel); + else + priv->event_prev_val &= ~BIT(chan->channel); - priv->event_scan_mask &= ~BIT(chan->channel); - if (state) priv->event_scan_mask |= BIT(chan->channel); + } else + priv->event_scan_mask &= ~BIT(chan->channel); return 0; } @@ -325,6 +356,7 @@ static const struct iio_enum hi8435_sensing_mode = { static const struct iio_chan_spec_ext_info hi8435_ext_info[] = { IIO_ENUM("sensing_mode", IIO_SEPARATE, &hi8435_sensing_mode), + IIO_ENUM_AVAILABLE("sensing_mode", &hi8435_sensing_mode), {}, }; @@ -333,6 +365,7 @@ static const struct iio_chan_spec_ext_info hi8435_ext_info[] = { .type = IIO_VOLTAGE, \ .indexed = 1, \ .channel = num, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .event_spec = hi8435_events, \ .num_event_specs = ARRAY_SIZE(hi8435_events), \ .ext_info = hi8435_ext_info, \ @@ -376,11 +409,12 @@ static const struct iio_chan_spec hi8435_channels[] = { static const struct iio_info hi8435_info = { .driver_module = THIS_MODULE, - .read_event_config = &hi8435_read_event_config, + .read_raw = hi8435_read_raw, + .read_event_config = hi8435_read_event_config, .write_event_config = hi8435_write_event_config, - .read_event_value = &hi8435_read_event_value, - .write_event_value = &hi8435_write_event_value, - .debugfs_reg_access = &hi8435_debugfs_reg_access, + .read_event_value = hi8435_read_event_value, + .write_event_value = hi8435_write_event_value, + .debugfs_reg_access = hi8435_debugfs_reg_access, }; static void hi8435_iio_push_event(struct iio_dev *idev, unsigned int val) diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c index db9838230257..232c0b80d658 100644 --- a/drivers/iio/adc/ina2xx-adc.c +++ b/drivers/iio/adc/ina2xx-adc.c @@ -42,13 +42,14 @@ #define INA2XX_CURRENT 0x04 /* readonly */ #define INA2XX_CALIBRATION 0x05 -#define INA226_ALERT_MASK GENMASK(2, 1) -#define INA266_CVRF BIT(3) +#define INA226_MASK_ENABLE 0x06 +#define INA226_CVRF BIT(3) #define INA2XX_MAX_REGISTERS 8 /* settings - depend on use case */ #define INA219_CONFIG_DEFAULT 0x399F /* PGA=8 */ +#define INA219_DEFAULT_IT 532 #define INA226_CONFIG_DEFAULT 0x4327 #define INA226_DEFAULT_AVG 4 #define INA226_DEFAULT_IT 1110 @@ -56,19 +57,24 @@ #define INA2XX_RSHUNT_DEFAULT 10000 /* - * bit mask for reading the averaging setting in the configuration register + * bit masks for reading the settings in the configuration register * FIXME: use regmap_fields. */ #define INA2XX_MODE_MASK GENMASK(3, 0) +/* Averaging for VBus/VShunt/Power */ #define INA226_AVG_MASK GENMASK(11, 9) #define INA226_SHIFT_AVG(val) ((val) << 9) /* Integration time for VBus */ +#define INA219_ITB_MASK GENMASK(10, 7) +#define INA219_SHIFT_ITB(val) ((val) << 7) #define INA226_ITB_MASK GENMASK(8, 6) #define INA226_SHIFT_ITB(val) ((val) << 6) /* Integration time for VShunt */ +#define INA219_ITS_MASK GENMASK(6, 3) +#define INA219_SHIFT_ITS(val) ((val) << 3) #define INA226_ITS_MASK GENMASK(5, 3) #define INA226_SHIFT_ITS(val) ((val) << 3) @@ -108,6 +114,7 @@ struct ina2xx_config { int bus_voltage_shift; int bus_voltage_lsb; /* uV */ int power_lsb; /* uW */ + enum ina2xx_ids chip_id; }; struct ina2xx_chip_info { @@ -130,6 +137,7 @@ static const struct ina2xx_config ina2xx_config[] = { .bus_voltage_shift = 3, .bus_voltage_lsb = 4000, .power_lsb = 20000, + .chip_id = ina219, }, [ina226] = { .config_default = INA226_CONFIG_DEFAULT, @@ -138,6 +146,7 @@ static const struct ina2xx_config ina2xx_config[] = { .bus_voltage_shift = 0, .bus_voltage_lsb = 1250, .power_lsb = 25000, + .chip_id = ina226, }, }; @@ -283,6 +292,66 @@ static int ina226_set_int_time_vshunt(struct ina2xx_chip_info *chip, return 0; } +/* Conversion times in uS. */ +static const int ina219_conv_time_tab_subsample[] = { 84, 148, 276, 532 }; +static const int ina219_conv_time_tab_average[] = { 532, 1060, 2130, 4260, + 8510, 17020, 34050, 68100}; + +static int ina219_lookup_int_time(unsigned int *val_us, int *bits) +{ + if (*val_us > 68100 || *val_us < 84) + return -EINVAL; + + if (*val_us <= 532) { + *bits = find_closest(*val_us, ina219_conv_time_tab_subsample, + ARRAY_SIZE(ina219_conv_time_tab_subsample)); + *val_us = ina219_conv_time_tab_subsample[*bits]; + } else { + *bits = find_closest(*val_us, ina219_conv_time_tab_average, + ARRAY_SIZE(ina219_conv_time_tab_average)); + *val_us = ina219_conv_time_tab_average[*bits]; + *bits |= 0x8; + } + + return 0; +} + +static int ina219_set_int_time_vbus(struct ina2xx_chip_info *chip, + unsigned int val_us, unsigned int *config) +{ + int bits, ret; + unsigned int val_us_best = val_us; + + ret = ina219_lookup_int_time(&val_us_best, &bits); + if (ret) + return ret; + + chip->int_time_vbus = val_us_best; + + *config &= ~INA219_ITB_MASK; + *config |= INA219_SHIFT_ITB(bits) & INA219_ITB_MASK; + + return 0; +} + +static int ina219_set_int_time_vshunt(struct ina2xx_chip_info *chip, + unsigned int val_us, unsigned int *config) +{ + int bits, ret; + unsigned int val_us_best = val_us; + + ret = ina219_lookup_int_time(&val_us_best, &bits); + if (ret) + return ret; + + chip->int_time_vshunt = val_us_best; + + *config &= ~INA219_ITS_MASK; + *config |= INA219_SHIFT_ITS(bits) & INA219_ITS_MASK; + + return 0; +} + static int ina2xx_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) @@ -308,10 +377,21 @@ static int ina2xx_write_raw(struct iio_dev *indio_dev, break; case IIO_CHAN_INFO_INT_TIME: - if (chan->address == INA2XX_SHUNT_VOLTAGE) - ret = ina226_set_int_time_vshunt(chip, val2, &tmp); - else - ret = ina226_set_int_time_vbus(chip, val2, &tmp); + if (chip->config->chip_id == ina226) { + if (chan->address == INA2XX_SHUNT_VOLTAGE) + ret = ina226_set_int_time_vshunt(chip, val2, + &tmp); + else + ret = ina226_set_int_time_vbus(chip, val2, + &tmp); + } else { + if (chan->address == INA2XX_SHUNT_VOLTAGE) + ret = ina219_set_int_time_vshunt(chip, val2, + &tmp); + else + ret = ina219_set_int_time_vbus(chip, val2, + &tmp); + } break; default: @@ -412,13 +492,30 @@ static ssize_t ina2xx_shunt_resistor_store(struct device *dev, return len; } -#define INA2XX_CHAN(_type, _index, _address) { \ +#define INA219_CHAN(_type, _index, _address) { \ + .type = (_type), \ + .address = (_address), \ + .indexed = 1, \ + .channel = (_index), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .scan_index = (_index), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_CPU, \ + } \ +} + +#define INA226_CHAN(_type, _index, _address) { \ .type = (_type), \ .address = (_address), \ .indexed = 1, \ .channel = (_index), \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \ - | BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE), \ .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ .scan_index = (_index), \ @@ -434,7 +531,25 @@ static ssize_t ina2xx_shunt_resistor_store(struct device *dev, * Sampling Freq is a consequence of the integration times of * the Voltage channels. */ -#define INA2XX_CHAN_VOLTAGE(_index, _address) { \ +#define INA219_CHAN_VOLTAGE(_index, _address) { \ + .type = IIO_VOLTAGE, \ + .address = (_address), \ + .indexed = 1, \ + .channel = (_index), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_INT_TIME), \ + .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ + .scan_index = (_index), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 16, \ + .storagebits = 16, \ + .endianness = IIO_LE, \ + } \ +} + +#define INA226_CHAN_VOLTAGE(_index, _address) { \ .type = IIO_VOLTAGE, \ .address = (_address), \ .indexed = 1, \ @@ -442,6 +557,8 @@ static ssize_t ina2xx_shunt_resistor_store(struct device *dev, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ BIT(IIO_CHAN_INFO_SCALE) | \ BIT(IIO_CHAN_INFO_INT_TIME), \ + .info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), \ .scan_index = (_index), \ .scan_type = { \ .sign = 'u', \ @@ -451,11 +568,20 @@ static ssize_t ina2xx_shunt_resistor_store(struct device *dev, } \ } -static const struct iio_chan_spec ina2xx_channels[] = { - INA2XX_CHAN_VOLTAGE(0, INA2XX_SHUNT_VOLTAGE), - INA2XX_CHAN_VOLTAGE(1, INA2XX_BUS_VOLTAGE), - INA2XX_CHAN(IIO_POWER, 2, INA2XX_POWER), - INA2XX_CHAN(IIO_CURRENT, 3, INA2XX_CURRENT), + +static const struct iio_chan_spec ina226_channels[] = { + INA226_CHAN_VOLTAGE(0, INA2XX_SHUNT_VOLTAGE), + INA226_CHAN_VOLTAGE(1, INA2XX_BUS_VOLTAGE), + INA226_CHAN(IIO_POWER, 2, INA2XX_POWER), + INA226_CHAN(IIO_CURRENT, 3, INA2XX_CURRENT), + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +static const struct iio_chan_spec ina219_channels[] = { + INA219_CHAN_VOLTAGE(0, INA2XX_SHUNT_VOLTAGE), + INA219_CHAN_VOLTAGE(1, INA2XX_BUS_VOLTAGE), + INA219_CHAN(IIO_POWER, 2, INA2XX_POWER), + INA219_CHAN(IIO_CURRENT, 3, INA2XX_CURRENT), IIO_CHAN_SOFT_TIMESTAMP(4), }; @@ -481,12 +607,12 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev) */ if (!chip->allow_async_readout) do { - ret = regmap_read(chip->regmap, INA226_ALERT_MASK, + ret = regmap_read(chip->regmap, INA226_MASK_ENABLE, &alert); if (ret < 0) return ret; - alert &= INA266_CVRF; + alert &= INA226_CVRF; } while (!alert); /* @@ -590,7 +716,14 @@ static int ina2xx_debug_reg(struct iio_dev *indio_dev, } /* Possible integration times for vshunt and vbus */ -static IIO_CONST_ATTR_INT_TIME_AVAIL("0.000140 0.000204 0.000332 0.000588 0.001100 0.002116 0.004156 0.008244"); +static IIO_CONST_ATTR_NAMED(ina219_integration_time_available, + integration_time_available, + "0.000084 0.000148 0.000276 0.000532 0.001060 0.002130 0.004260 0.008510 0.017020 0.034050 0.068100"); + +static IIO_CONST_ATTR_NAMED(ina226_integration_time_available, + integration_time_available, + "0.000140 0.000204 0.000332 0.000588 0.001100 0.002116 0.004156 0.008244"); + static IIO_DEVICE_ATTR(in_allow_async_readout, S_IRUGO | S_IWUSR, ina2xx_allow_async_readout_show, @@ -600,20 +733,39 @@ static IIO_DEVICE_ATTR(in_shunt_resistor, S_IRUGO | S_IWUSR, ina2xx_shunt_resistor_show, ina2xx_shunt_resistor_store, 0); -static struct attribute *ina2xx_attributes[] = { +static struct attribute *ina219_attributes[] = { + &iio_dev_attr_in_allow_async_readout.dev_attr.attr, + &iio_const_attr_ina219_integration_time_available.dev_attr.attr, + &iio_dev_attr_in_shunt_resistor.dev_attr.attr, + NULL, +}; + +static struct attribute *ina226_attributes[] = { &iio_dev_attr_in_allow_async_readout.dev_attr.attr, - &iio_const_attr_integration_time_available.dev_attr.attr, + &iio_const_attr_ina226_integration_time_available.dev_attr.attr, &iio_dev_attr_in_shunt_resistor.dev_attr.attr, NULL, }; -static const struct attribute_group ina2xx_attribute_group = { - .attrs = ina2xx_attributes, +static const struct attribute_group ina219_attribute_group = { + .attrs = ina219_attributes, +}; + +static const struct attribute_group ina226_attribute_group = { + .attrs = ina226_attributes, }; -static const struct iio_info ina2xx_info = { +static const struct iio_info ina219_info = { .driver_module = THIS_MODULE, - .attrs = &ina2xx_attribute_group, + .attrs = &ina219_attribute_group, + .read_raw = ina2xx_read_raw, + .write_raw = ina2xx_write_raw, + .debugfs_reg_access = ina2xx_debug_reg, +}; + +static const struct iio_info ina226_info = { + .driver_module = THIS_MODULE, + .attrs = &ina226_attribute_group, .read_raw = ina2xx_read_raw, .write_raw = ina2xx_write_raw, .debugfs_reg_access = ina2xx_debug_reg, @@ -684,6 +836,10 @@ static int ina2xx_probe(struct i2c_client *client, ina226_set_average(chip, INA226_DEFAULT_AVG, &val); ina226_set_int_time_vbus(chip, INA226_DEFAULT_IT, &val); ina226_set_int_time_vshunt(chip, INA226_DEFAULT_IT, &val); + } else { + chip->avg = 1; + ina219_set_int_time_vbus(chip, INA219_DEFAULT_IT, &val); + ina219_set_int_time_vshunt(chip, INA219_DEFAULT_IT, &val); } ret = ina2xx_init(chip, val); @@ -695,10 +851,16 @@ static int ina2xx_probe(struct i2c_client *client, indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE; indio_dev->dev.parent = &client->dev; indio_dev->dev.of_node = client->dev.of_node; - indio_dev->channels = ina2xx_channels; - indio_dev->num_channels = ARRAY_SIZE(ina2xx_channels); + if (id->driver_data == ina226) { + indio_dev->channels = ina226_channels; + indio_dev->num_channels = ARRAY_SIZE(ina226_channels); + indio_dev->info = &ina226_info; + } else { + indio_dev->channels = ina219_channels; + indio_dev->num_channels = ARRAY_SIZE(ina219_channels); + indio_dev->info = &ina219_info; + } indio_dev->name = id->name; - indio_dev->info = &ina2xx_info; indio_dev->setup_ops = &ina2xx_setup_ops; buffer = devm_iio_kfifo_allocate(&indio_dev->dev); diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c index 0de709b4288b..6a5b9a9bc662 100644 --- a/drivers/iio/adc/lpc32xx_adc.c +++ b/drivers/iio/adc/lpc32xx_adc.c @@ -76,10 +76,14 @@ static int lpc32xx_read_raw(struct iio_dev *indio_dev, long mask) { struct lpc32xx_adc_state *st = iio_priv(indio_dev); - + int ret; if (mask == IIO_CHAN_INFO_RAW) { mutex_lock(&indio_dev->mlock); - clk_prepare_enable(st->clk); + ret = clk_prepare_enable(st->clk); + if (ret) { + mutex_unlock(&indio_dev->mlock); + return ret; + } /* Measurement setup */ __raw_writel(LPC32XXAD_INTERNAL | (chan->address) | LPC32XXAD_REFp | LPC32XXAD_REFm, diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 6066bbfc42fe..83da50ed73ab 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -220,6 +220,7 @@ enum meson_sar_adc_chan7_mux_sel { }; struct meson_sar_adc_data { + bool has_bl30_integration; unsigned int resolution; const char *name; }; @@ -437,19 +438,24 @@ static int meson_sar_adc_lock(struct iio_dev *indio_dev) mutex_lock(&indio_dev->mlock); - /* prevent BL30 from using the SAR ADC while we are using it */ - regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY, - MESON_SAR_ADC_DELAY_KERNEL_BUSY, - MESON_SAR_ADC_DELAY_KERNEL_BUSY); - - /* wait until BL30 releases it's lock (so we can use the SAR ADC) */ - do { - udelay(1); - regmap_read(priv->regmap, MESON_SAR_ADC_DELAY, &val); - } while (val & MESON_SAR_ADC_DELAY_BL30_BUSY && timeout--); - - if (timeout < 0) - return -ETIMEDOUT; + if (priv->data->has_bl30_integration) { + /* prevent BL30 from using the SAR ADC while we are using it */ + regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY, + MESON_SAR_ADC_DELAY_KERNEL_BUSY, + MESON_SAR_ADC_DELAY_KERNEL_BUSY); + + /* + * wait until BL30 releases it's lock (so we can use the SAR + * ADC) + */ + do { + udelay(1); + regmap_read(priv->regmap, MESON_SAR_ADC_DELAY, &val); + } while (val & MESON_SAR_ADC_DELAY_BL30_BUSY && timeout--); + + if (timeout < 0) + return -ETIMEDOUT; + } return 0; } @@ -458,9 +464,10 @@ static void meson_sar_adc_unlock(struct iio_dev *indio_dev) { struct meson_sar_adc_priv *priv = iio_priv(indio_dev); - /* allow BL30 to use the SAR ADC again */ - regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY, - MESON_SAR_ADC_DELAY_KERNEL_BUSY, 0); + if (priv->data->has_bl30_integration) + /* allow BL30 to use the SAR ADC again */ + regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELAY, + MESON_SAR_ADC_DELAY_KERNEL_BUSY, 0); mutex_unlock(&indio_dev->mlock); } @@ -614,14 +621,16 @@ static int meson_sar_adc_init(struct iio_dev *indio_dev) */ meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_CH7_INPUT); - /* - * leave sampling delay and the input clocks as configured by BL30 to - * make sure BL30 gets the values it expects when reading the - * temperature sensor. - */ - regmap_read(priv->regmap, MESON_SAR_ADC_REG3, ®val); - if (regval & MESON_SAR_ADC_REG3_BL30_INITIALIZED) - return 0; + if (priv->data->has_bl30_integration) { + /* + * leave sampling delay and the input clocks as configured by + * BL30 to make sure BL30 gets the values it expects when + * reading the temperature sensor. + */ + regmap_read(priv->regmap, MESON_SAR_ADC_REG3, ®val); + if (regval & MESON_SAR_ADC_REG3_BL30_INITIALIZED) + return 0; + } meson_sar_adc_stop_sample_engine(indio_dev); @@ -834,23 +843,46 @@ static const struct iio_info meson_sar_adc_iio_info = { .driver_module = THIS_MODULE, }; -struct meson_sar_adc_data meson_sar_adc_gxbb_data = { +static const struct meson_sar_adc_data meson_sar_adc_meson8_data = { + .has_bl30_integration = false, + .resolution = 10, + .name = "meson-meson8-saradc", +}; + +static const struct meson_sar_adc_data meson_sar_adc_meson8b_data = { + .has_bl30_integration = false, + .resolution = 10, + .name = "meson-meson8b-saradc", +}; + +static const struct meson_sar_adc_data meson_sar_adc_gxbb_data = { + .has_bl30_integration = true, .resolution = 10, .name = "meson-gxbb-saradc", }; -struct meson_sar_adc_data meson_sar_adc_gxl_data = { +static const struct meson_sar_adc_data meson_sar_adc_gxl_data = { + .has_bl30_integration = true, .resolution = 12, .name = "meson-gxl-saradc", }; -struct meson_sar_adc_data meson_sar_adc_gxm_data = { +static const struct meson_sar_adc_data meson_sar_adc_gxm_data = { + .has_bl30_integration = true, .resolution = 12, .name = "meson-gxm-saradc", }; static const struct of_device_id meson_sar_adc_of_match[] = { { + .compatible = "amlogic,meson8-saradc", + .data = &meson_sar_adc_meson8_data, + }, + { + .compatible = "amlogic,meson8b-saradc", + .data = &meson_sar_adc_meson8b_data, + }, + { .compatible = "amlogic,meson-gxbb-saradc", .data = &meson_sar_adc_gxbb_data, }, { diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c index 6888167ca1e6..d32b34638c2f 100644 --- a/drivers/iio/adc/mxs-lradc-adc.c +++ b/drivers/iio/adc/mxs-lradc-adc.c @@ -48,7 +48,7 @@ #define VREF_MV_BASE 1850 -const char *mx23_lradc_adc_irq_names[] = { +static const char *mx23_lradc_adc_irq_names[] = { "mxs-lradc-channel0", "mxs-lradc-channel1", "mxs-lradc-channel2", @@ -57,7 +57,7 @@ const char *mx23_lradc_adc_irq_names[] = { "mxs-lradc-channel5", }; -const char *mx28_lradc_adc_irq_names[] = { +static const char *mx28_lradc_adc_irq_names[] = { "mxs-lradc-thresh0", "mxs-lradc-thresh1", "mxs-lradc-channel0", @@ -344,20 +344,20 @@ static ssize_t mxs_lradc_adc_show_scale_avail(struct device *dev, IIO_DEVICE_ATTR(in_voltage##ch##_scale_available, 0444,\ mxs_lradc_adc_show_scale_avail, NULL, ch) -SHOW_SCALE_AVAILABLE_ATTR(0); -SHOW_SCALE_AVAILABLE_ATTR(1); -SHOW_SCALE_AVAILABLE_ATTR(2); -SHOW_SCALE_AVAILABLE_ATTR(3); -SHOW_SCALE_AVAILABLE_ATTR(4); -SHOW_SCALE_AVAILABLE_ATTR(5); -SHOW_SCALE_AVAILABLE_ATTR(6); -SHOW_SCALE_AVAILABLE_ATTR(7); -SHOW_SCALE_AVAILABLE_ATTR(10); -SHOW_SCALE_AVAILABLE_ATTR(11); -SHOW_SCALE_AVAILABLE_ATTR(12); -SHOW_SCALE_AVAILABLE_ATTR(13); -SHOW_SCALE_AVAILABLE_ATTR(14); -SHOW_SCALE_AVAILABLE_ATTR(15); +static SHOW_SCALE_AVAILABLE_ATTR(0); +static SHOW_SCALE_AVAILABLE_ATTR(1); +static SHOW_SCALE_AVAILABLE_ATTR(2); +static SHOW_SCALE_AVAILABLE_ATTR(3); +static SHOW_SCALE_AVAILABLE_ATTR(4); +static SHOW_SCALE_AVAILABLE_ATTR(5); +static SHOW_SCALE_AVAILABLE_ATTR(6); +static SHOW_SCALE_AVAILABLE_ATTR(7); +static SHOW_SCALE_AVAILABLE_ATTR(10); +static SHOW_SCALE_AVAILABLE_ATTR(11); +static SHOW_SCALE_AVAILABLE_ATTR(12); +static SHOW_SCALE_AVAILABLE_ATTR(13); +static SHOW_SCALE_AVAILABLE_ATTR(14); +static SHOW_SCALE_AVAILABLE_ATTR(15); static struct attribute *mxs_lradc_adc_attributes[] = { &iio_dev_attr_in_voltage0_scale_available.dev_attr.attr, diff --git a/drivers/iio/adc/rcar-gyroadc.c b/drivers/iio/adc/rcar-gyroadc.c index 018ed360e717..27a318164619 100644 --- a/drivers/iio/adc/rcar-gyroadc.c +++ b/drivers/iio/adc/rcar-gyroadc.c @@ -73,7 +73,7 @@ enum rcar_gyroadc_model { struct rcar_gyroadc { struct device *dev; void __iomem *regs; - struct clk *iclk; + struct clk *clk; struct regulator *vref[8]; unsigned int num_channels; enum rcar_gyroadc_model model; @@ -83,7 +83,7 @@ struct rcar_gyroadc { static void rcar_gyroadc_hw_init(struct rcar_gyroadc *priv) { - const unsigned long clk_mhz = clk_get_rate(priv->iclk) / 1000000; + const unsigned long clk_mhz = clk_get_rate(priv->clk) / 1000000; const unsigned long clk_mul = (priv->mode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) ? 10 : 5; unsigned long clk_len = clk_mhz * clk_mul; @@ -510,9 +510,9 @@ static int rcar_gyroadc_probe(struct platform_device *pdev) if (IS_ERR(priv->regs)) return PTR_ERR(priv->regs); - priv->iclk = devm_clk_get(dev, "if"); - if (IS_ERR(priv->iclk)) { - ret = PTR_ERR(priv->iclk); + priv->clk = devm_clk_get(dev, "fck"); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); if (ret != -EPROBE_DEFER) dev_err(dev, "Failed to get IF clock (ret=%i)\n", ret); return ret; @@ -536,7 +536,7 @@ static int rcar_gyroadc_probe(struct platform_device *pdev) indio_dev->info = &rcar_gyroadc_iio_info; indio_dev->modes = INDIO_DIRECT_MODE; - ret = clk_prepare_enable(priv->iclk); + ret = clk_prepare_enable(priv->clk); if (ret) { dev_err(dev, "Could not prepare or enable the IF clock.\n"); goto err_clk_if_enable; @@ -565,7 +565,7 @@ err_iio_device_register: pm_runtime_put_sync(dev); pm_runtime_disable(dev); pm_runtime_set_suspended(dev); - clk_disable_unprepare(priv->iclk); + clk_disable_unprepare(priv->clk); err_clk_if_enable: rcar_gyroadc_deinit_supplies(indio_dev); @@ -584,7 +584,7 @@ static int rcar_gyroadc_remove(struct platform_device *pdev) pm_runtime_put_sync(dev); pm_runtime_disable(dev); pm_runtime_set_suspended(dev); - clk_disable_unprepare(priv->iclk); + clk_disable_unprepare(priv->clk); rcar_gyroadc_deinit_supplies(indio_dev); return 0; diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c index 22b7c9321e78..e09233b03c05 100644 --- a/drivers/iio/adc/stm32-adc-core.c +++ b/drivers/iio/adc/stm32-adc-core.c @@ -49,19 +49,66 @@ /* STM32 F4 maximum analog clock rate (from datasheet) */ #define STM32F4_ADC_MAX_CLK_RATE 36000000 +/* STM32H7 - common registers for all ADC instances */ +#define STM32H7_ADC_CSR (STM32_ADCX_COMN_OFFSET + 0x00) +#define STM32H7_ADC_CCR (STM32_ADCX_COMN_OFFSET + 0x08) + +/* STM32H7_ADC_CSR - bit fields */ +#define STM32H7_EOC_SLV BIT(18) +#define STM32H7_EOC_MST BIT(2) + +/* STM32H7_ADC_CCR - bit fields */ +#define STM32H7_PRESC_SHIFT 18 +#define STM32H7_PRESC_MASK GENMASK(21, 18) +#define STM32H7_CKMODE_SHIFT 16 +#define STM32H7_CKMODE_MASK GENMASK(17, 16) + +/* STM32 H7 maximum analog clock rate (from datasheet) */ +#define STM32H7_ADC_MAX_CLK_RATE 72000000 + +/** + * stm32_adc_common_regs - stm32 common registers, compatible dependent data + * @csr: common status register offset + * @eoc1: adc1 end of conversion flag in @csr + * @eoc2: adc2 end of conversion flag in @csr + * @eoc3: adc3 end of conversion flag in @csr + */ +struct stm32_adc_common_regs { + u32 csr; + u32 eoc1_msk; + u32 eoc2_msk; + u32 eoc3_msk; +}; + +struct stm32_adc_priv; + +/** + * stm32_adc_priv_cfg - stm32 core compatible configuration data + * @regs: common registers for all instances + * @clk_sel: clock selection routine + */ +struct stm32_adc_priv_cfg { + const struct stm32_adc_common_regs *regs; + int (*clk_sel)(struct platform_device *, struct stm32_adc_priv *); +}; + /** * struct stm32_adc_priv - stm32 ADC core private data * @irq: irq for ADC block * @domain: irq domain reference * @aclk: clock reference for the analog circuitry + * @bclk: bus clock common for all ADCs, depends on part used * @vref: regulator reference + * @cfg: compatible configuration data * @common: common data for all ADC instances */ struct stm32_adc_priv { int irq; struct irq_domain *domain; struct clk *aclk; + struct clk *bclk; struct regulator *vref; + const struct stm32_adc_priv_cfg *cfg; struct stm32_adc_common common; }; @@ -85,14 +132,23 @@ static int stm32f4_adc_clk_sel(struct platform_device *pdev, u32 val; int i; + /* stm32f4 has one clk input for analog (mandatory), enforce it here */ + if (!priv->aclk) { + dev_err(&pdev->dev, "No 'adc' clock found\n"); + return -ENOENT; + } + rate = clk_get_rate(priv->aclk); for (i = 0; i < ARRAY_SIZE(stm32f4_pclk_div); i++) { if ((rate / stm32f4_pclk_div[i]) <= STM32F4_ADC_MAX_CLK_RATE) break; } - if (i >= ARRAY_SIZE(stm32f4_pclk_div)) + if (i >= ARRAY_SIZE(stm32f4_pclk_div)) { + dev_err(&pdev->dev, "adc clk selection failed\n"); return -EINVAL; + } + priv->common.rate = rate; val = readl_relaxed(priv->common.base + STM32F4_ADC_CCR); val &= ~STM32F4_ADC_ADCPRE_MASK; val |= i << STM32F4_ADC_ADCPRE_SHIFT; @@ -104,6 +160,126 @@ static int stm32f4_adc_clk_sel(struct platform_device *pdev, return 0; } +/** + * struct stm32h7_adc_ck_spec - specification for stm32h7 adc clock + * @ckmode: ADC clock mode, Async or sync with prescaler. + * @presc: prescaler bitfield for async clock mode + * @div: prescaler division ratio + */ +struct stm32h7_adc_ck_spec { + u32 ckmode; + u32 presc; + int div; +}; + +const struct stm32h7_adc_ck_spec stm32h7_adc_ckmodes_spec[] = { + /* 00: CK_ADC[1..3]: Asynchronous clock modes */ + { 0, 0, 1 }, + { 0, 1, 2 }, + { 0, 2, 4 }, + { 0, 3, 6 }, + { 0, 4, 8 }, + { 0, 5, 10 }, + { 0, 6, 12 }, + { 0, 7, 16 }, + { 0, 8, 32 }, + { 0, 9, 64 }, + { 0, 10, 128 }, + { 0, 11, 256 }, + /* HCLK used: Synchronous clock modes (1, 2 or 4 prescaler) */ + { 1, 0, 1 }, + { 2, 0, 2 }, + { 3, 0, 4 }, +}; + +static int stm32h7_adc_clk_sel(struct platform_device *pdev, + struct stm32_adc_priv *priv) +{ + u32 ckmode, presc, val; + unsigned long rate; + int i, div; + + /* stm32h7 bus clock is common for all ADC instances (mandatory) */ + if (!priv->bclk) { + dev_err(&pdev->dev, "No 'bus' clock found\n"); + return -ENOENT; + } + + /* + * stm32h7 can use either 'bus' or 'adc' clock for analog circuitry. + * So, choice is to have bus clock mandatory and adc clock optional. + * If optional 'adc' clock has been found, then try to use it first. + */ + if (priv->aclk) { + /* + * Asynchronous clock modes (e.g. ckmode == 0) + * From spec: PLL output musn't exceed max rate + */ + rate = clk_get_rate(priv->aclk); + + for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) { + ckmode = stm32h7_adc_ckmodes_spec[i].ckmode; + presc = stm32h7_adc_ckmodes_spec[i].presc; + div = stm32h7_adc_ckmodes_spec[i].div; + + if (ckmode) + continue; + + if ((rate / div) <= STM32H7_ADC_MAX_CLK_RATE) + goto out; + } + } + + /* Synchronous clock modes (e.g. ckmode is 1, 2 or 3) */ + rate = clk_get_rate(priv->bclk); + + for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) { + ckmode = stm32h7_adc_ckmodes_spec[i].ckmode; + presc = stm32h7_adc_ckmodes_spec[i].presc; + div = stm32h7_adc_ckmodes_spec[i].div; + + if (!ckmode) + continue; + + if ((rate / div) <= STM32H7_ADC_MAX_CLK_RATE) + goto out; + } + + dev_err(&pdev->dev, "adc clk selection failed\n"); + return -EINVAL; + +out: + /* rate used later by each ADC instance to control BOOST mode */ + priv->common.rate = rate; + + /* Set common clock mode and prescaler */ + val = readl_relaxed(priv->common.base + STM32H7_ADC_CCR); + val &= ~(STM32H7_CKMODE_MASK | STM32H7_PRESC_MASK); + val |= ckmode << STM32H7_CKMODE_SHIFT; + val |= presc << STM32H7_PRESC_SHIFT; + writel_relaxed(val, priv->common.base + STM32H7_ADC_CCR); + + dev_dbg(&pdev->dev, "Using %s clock/%d source at %ld kHz\n", + ckmode ? "bus" : "adc", div, rate / (div * 1000)); + + return 0; +} + +/* STM32F4 common registers definitions */ +static const struct stm32_adc_common_regs stm32f4_adc_common_regs = { + .csr = STM32F4_ADC_CSR, + .eoc1_msk = STM32F4_EOC1, + .eoc2_msk = STM32F4_EOC2, + .eoc3_msk = STM32F4_EOC3, +}; + +/* STM32H7 common registers definitions */ +static const struct stm32_adc_common_regs stm32h7_adc_common_regs = { + .csr = STM32H7_ADC_CSR, + .eoc1_msk = STM32H7_EOC_MST, + .eoc2_msk = STM32H7_EOC_SLV, +}; + /* ADC common interrupt for all instances */ static void stm32_adc_irq_handler(struct irq_desc *desc) { @@ -112,15 +288,15 @@ static void stm32_adc_irq_handler(struct irq_desc *desc) u32 status; chained_irq_enter(chip, desc); - status = readl_relaxed(priv->common.base + STM32F4_ADC_CSR); + status = readl_relaxed(priv->common.base + priv->cfg->regs->csr); - if (status & STM32F4_EOC1) + if (status & priv->cfg->regs->eoc1_msk) generic_handle_irq(irq_find_mapping(priv->domain, 0)); - if (status & STM32F4_EOC2) + if (status & priv->cfg->regs->eoc2_msk) generic_handle_irq(irq_find_mapping(priv->domain, 1)); - if (status & STM32F4_EOC3) + if (status & priv->cfg->regs->eoc3_msk) generic_handle_irq(irq_find_mapping(priv->domain, 2)); chained_irq_exit(chip, desc); @@ -186,6 +362,7 @@ static void stm32_adc_irq_remove(struct platform_device *pdev, static int stm32_adc_probe(struct platform_device *pdev) { struct stm32_adc_priv *priv; + struct device *dev = &pdev->dev; struct device_node *np = pdev->dev.of_node; struct resource *res; int ret; @@ -197,6 +374,9 @@ static int stm32_adc_probe(struct platform_device *pdev) if (!priv) return -ENOMEM; + priv->cfg = (const struct stm32_adc_priv_cfg *) + of_match_device(dev->driver->of_match_table, dev)->data; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->common.base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->common.base)) @@ -227,25 +407,48 @@ static int stm32_adc_probe(struct platform_device *pdev) priv->aclk = devm_clk_get(&pdev->dev, "adc"); if (IS_ERR(priv->aclk)) { ret = PTR_ERR(priv->aclk); - dev_err(&pdev->dev, "Can't get 'adc' clock\n"); - goto err_regulator_disable; + if (ret == -ENOENT) { + priv->aclk = NULL; + } else { + dev_err(&pdev->dev, "Can't get 'adc' clock\n"); + goto err_regulator_disable; + } } - ret = clk_prepare_enable(priv->aclk); - if (ret < 0) { - dev_err(&pdev->dev, "adc clk enable failed\n"); - goto err_regulator_disable; + if (priv->aclk) { + ret = clk_prepare_enable(priv->aclk); + if (ret < 0) { + dev_err(&pdev->dev, "adc clk enable failed\n"); + goto err_regulator_disable; + } } - ret = stm32f4_adc_clk_sel(pdev, priv); - if (ret < 0) { - dev_err(&pdev->dev, "adc clk selection failed\n"); - goto err_clk_disable; + priv->bclk = devm_clk_get(&pdev->dev, "bus"); + if (IS_ERR(priv->bclk)) { + ret = PTR_ERR(priv->bclk); + if (ret == -ENOENT) { + priv->bclk = NULL; + } else { + dev_err(&pdev->dev, "Can't get 'bus' clock\n"); + goto err_aclk_disable; + } + } + + if (priv->bclk) { + ret = clk_prepare_enable(priv->bclk); + if (ret < 0) { + dev_err(&pdev->dev, "adc clk enable failed\n"); + goto err_aclk_disable; + } } + ret = priv->cfg->clk_sel(pdev, priv); + if (ret < 0) + goto err_bclk_disable; + ret = stm32_adc_irq_probe(pdev, priv); if (ret < 0) - goto err_clk_disable; + goto err_bclk_disable; platform_set_drvdata(pdev, &priv->common); @@ -260,8 +463,13 @@ static int stm32_adc_probe(struct platform_device *pdev) err_irq_remove: stm32_adc_irq_remove(pdev, priv); -err_clk_disable: - clk_disable_unprepare(priv->aclk); +err_bclk_disable: + if (priv->bclk) + clk_disable_unprepare(priv->bclk); + +err_aclk_disable: + if (priv->aclk) + clk_disable_unprepare(priv->aclk); err_regulator_disable: regulator_disable(priv->vref); @@ -276,15 +484,34 @@ static int stm32_adc_remove(struct platform_device *pdev) of_platform_depopulate(&pdev->dev); stm32_adc_irq_remove(pdev, priv); - clk_disable_unprepare(priv->aclk); + if (priv->bclk) + clk_disable_unprepare(priv->bclk); + if (priv->aclk) + clk_disable_unprepare(priv->aclk); regulator_disable(priv->vref); return 0; } +static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = { + .regs = &stm32f4_adc_common_regs, + .clk_sel = stm32f4_adc_clk_sel, +}; + +static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = { + .regs = &stm32h7_adc_common_regs, + .clk_sel = stm32h7_adc_clk_sel, +}; + static const struct of_device_id stm32_adc_of_match[] = { - { .compatible = "st,stm32f4-adc-core" }, - {}, + { + .compatible = "st,stm32f4-adc-core", + .data = (void *)&stm32f4_adc_priv_cfg + }, { + .compatible = "st,stm32h7-adc-core", + .data = (void *)&stm32h7_adc_priv_cfg + }, { + }, }; MODULE_DEVICE_TABLE(of, stm32_adc_of_match); diff --git a/drivers/iio/adc/stm32-adc-core.h b/drivers/iio/adc/stm32-adc-core.h index 2ec7abbfbcaa..250ee958a669 100644 --- a/drivers/iio/adc/stm32-adc-core.h +++ b/drivers/iio/adc/stm32-adc-core.h @@ -43,11 +43,13 @@ * struct stm32_adc_common - stm32 ADC driver common data (for all instances) * @base: control registers base cpu addr * @phys_base: control registers base physical addr + * @rate: clock rate used for analog circuitry * @vref_mv: vref voltage (mv) */ struct stm32_adc_common { void __iomem *base; phys_addr_t phys_base; + unsigned long rate; int vref_mv; }; diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c index c28e7ff80e11..5bfcc1f13105 100644 --- a/drivers/iio/adc/stm32-adc.c +++ b/drivers/iio/adc/stm32-adc.c @@ -31,9 +31,11 @@ #include <linux/iio/triggered_buffer.h> #include <linux/interrupt.h> #include <linux/io.h> +#include <linux/iopoll.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/of.h> +#include <linux/of_device.h> #include "stm32-adc-core.h" @@ -76,6 +78,78 @@ #define STM32F4_DMA BIT(8) #define STM32F4_ADON BIT(0) +/* STM32H7 - Registers for each ADC instance */ +#define STM32H7_ADC_ISR 0x00 +#define STM32H7_ADC_IER 0x04 +#define STM32H7_ADC_CR 0x08 +#define STM32H7_ADC_CFGR 0x0C +#define STM32H7_ADC_PCSEL 0x1C +#define STM32H7_ADC_SQR1 0x30 +#define STM32H7_ADC_SQR2 0x34 +#define STM32H7_ADC_SQR3 0x38 +#define STM32H7_ADC_SQR4 0x3C +#define STM32H7_ADC_DR 0x40 +#define STM32H7_ADC_CALFACT 0xC4 +#define STM32H7_ADC_CALFACT2 0xC8 + +/* STM32H7_ADC_ISR - bit fields */ +#define STM32H7_EOC BIT(2) +#define STM32H7_ADRDY BIT(0) + +/* STM32H7_ADC_IER - bit fields */ +#define STM32H7_EOCIE STM32H7_EOC + +/* STM32H7_ADC_CR - bit fields */ +#define STM32H7_ADCAL BIT(31) +#define STM32H7_ADCALDIF BIT(30) +#define STM32H7_DEEPPWD BIT(29) +#define STM32H7_ADVREGEN BIT(28) +#define STM32H7_LINCALRDYW6 BIT(27) +#define STM32H7_LINCALRDYW5 BIT(26) +#define STM32H7_LINCALRDYW4 BIT(25) +#define STM32H7_LINCALRDYW3 BIT(24) +#define STM32H7_LINCALRDYW2 BIT(23) +#define STM32H7_LINCALRDYW1 BIT(22) +#define STM32H7_ADCALLIN BIT(16) +#define STM32H7_BOOST BIT(8) +#define STM32H7_ADSTP BIT(4) +#define STM32H7_ADSTART BIT(2) +#define STM32H7_ADDIS BIT(1) +#define STM32H7_ADEN BIT(0) + +/* STM32H7_ADC_CFGR bit fields */ +#define STM32H7_EXTEN_SHIFT 10 +#define STM32H7_EXTEN_MASK GENMASK(11, 10) +#define STM32H7_EXTSEL_SHIFT 5 +#define STM32H7_EXTSEL_MASK GENMASK(9, 5) +#define STM32H7_RES_SHIFT 2 +#define STM32H7_RES_MASK GENMASK(4, 2) +#define STM32H7_DMNGT_SHIFT 0 +#define STM32H7_DMNGT_MASK GENMASK(1, 0) + +enum stm32h7_adc_dmngt { + STM32H7_DMNGT_DR_ONLY, /* Regular data in DR only */ + STM32H7_DMNGT_DMA_ONESHOT, /* DMA one shot mode */ + STM32H7_DMNGT_DFSDM, /* DFSDM mode */ + STM32H7_DMNGT_DMA_CIRC, /* DMA circular mode */ +}; + +/* STM32H7_ADC_CALFACT - bit fields */ +#define STM32H7_CALFACT_D_SHIFT 16 +#define STM32H7_CALFACT_D_MASK GENMASK(26, 16) +#define STM32H7_CALFACT_S_SHIFT 0 +#define STM32H7_CALFACT_S_MASK GENMASK(10, 0) + +/* STM32H7_ADC_CALFACT2 - bit fields */ +#define STM32H7_LINCALFACT_SHIFT 0 +#define STM32H7_LINCALFACT_MASK GENMASK(29, 0) + +/* Number of linear calibration shadow registers / LINCALRDYW control bits */ +#define STM32H7_LINCALFACT_NUM 6 + +/* BOOST bit must be set on STM32H7 when ADC clock is above 20MHz */ +#define STM32H7_BOOST_CLKRATE 20000000UL + #define STM32_ADC_MAX_SQ 16 /* SQ1..SQ16 */ #define STM32_ADC_TIMEOUT_US 100000 #define STM32_ADC_TIMEOUT (msecs_to_jiffies(STM32_ADC_TIMEOUT_US / 1000)) @@ -121,6 +195,18 @@ struct stm32_adc_trig_info { }; /** + * struct stm32_adc_calib - optional adc calibration data + * @calfact_s: Calibration offset for single ended channels + * @calfact_d: Calibration offset in differential + * @lincalfact: Linearity calibration factor + */ +struct stm32_adc_calib { + u32 calfact_s; + u32 calfact_d; + u32 lincalfact[STM32H7_LINCALFACT_NUM]; +}; + +/** * stm32_adc_regs - stm32 ADC misc registers & bitfield desc * @reg: register offset * @mask: bitfield mask @@ -133,9 +219,56 @@ struct stm32_adc_regs { }; /** + * stm32_adc_regspec - stm32 registers definition, compatible dependent data + * @dr: data register offset + * @ier_eoc: interrupt enable register & eocie bitfield + * @isr_eoc: interrupt status register & eoc bitfield + * @sqr: reference to sequence registers array + * @exten: trigger control register & bitfield + * @extsel: trigger selection register & bitfield + * @res: resolution selection register & bitfield + */ +struct stm32_adc_regspec { + const u32 dr; + const struct stm32_adc_regs ier_eoc; + const struct stm32_adc_regs isr_eoc; + const struct stm32_adc_regs *sqr; + const struct stm32_adc_regs exten; + const struct stm32_adc_regs extsel; + const struct stm32_adc_regs res; +}; + +struct stm32_adc; + +/** + * stm32_adc_cfg - stm32 compatible configuration data + * @regs: registers descriptions + * @adc_info: per instance input channels definitions + * @trigs: external trigger sources + * @clk_required: clock is required + * @selfcalib: optional routine for self-calibration + * @prepare: optional prepare routine (power-up, enable) + * @start_conv: routine to start conversions + * @stop_conv: routine to stop conversions + * @unprepare: optional unprepare routine (disable, power-down) + */ +struct stm32_adc_cfg { + const struct stm32_adc_regspec *regs; + const struct stm32_adc_info *adc_info; + struct stm32_adc_trig_info *trigs; + bool clk_required; + int (*selfcalib)(struct stm32_adc *); + int (*prepare)(struct stm32_adc *); + void (*start_conv)(struct stm32_adc *, bool dma); + void (*stop_conv)(struct stm32_adc *); + void (*unprepare)(struct stm32_adc *); +}; + +/** * struct stm32_adc - private data of each ADC IIO instance * @common: reference to ADC block common data * @offset: ADC instance register offset in ADC block + * @cfg: compatible configuration data * @completion: end of single conversion completion * @buffer: data buffer * @clk: clock for this adc instance @@ -149,10 +282,13 @@ struct stm32_adc_regs { * @rx_buf: dma rx buffer cpu address * @rx_dma_buf: dma rx buffer bus address * @rx_buf_sz: dma rx buffer size + * @pcsel bitmask to preselect channels on some devices + * @cal: optional calibration data on some devices */ struct stm32_adc { struct stm32_adc_common *common; u32 offset; + const struct stm32_adc_cfg *cfg; struct completion completion; u16 buffer[STM32_ADC_MAX_SQ]; struct clk *clk; @@ -166,6 +302,8 @@ struct stm32_adc { u8 *rx_buf; dma_addr_t rx_dma_buf; unsigned int rx_buf_sz; + u32 pcsel; + struct stm32_adc_calib cal; }; /** @@ -180,8 +318,26 @@ struct stm32_adc_chan_spec { const char *name; }; -/* Input definitions common for all STM32F4 instances */ -static const struct stm32_adc_chan_spec stm32f4_adc123_channels[] = { +/** + * struct stm32_adc_info - stm32 ADC, per instance config data + * @channels: Reference to stm32 channels spec + * @max_channels: Number of channels + * @resolutions: available resolutions + * @num_res: number of available resolutions + */ +struct stm32_adc_info { + const struct stm32_adc_chan_spec *channels; + int max_channels; + const unsigned int *resolutions; + const unsigned int num_res; +}; + +/* + * Input definitions common for all instances: + * stm32f4 can have up to 16 channels + * stm32h7 can have up to 20 channels + */ +static const struct stm32_adc_chan_spec stm32_adc_channels[] = { { IIO_VOLTAGE, 0, "in0" }, { IIO_VOLTAGE, 1, "in1" }, { IIO_VOLTAGE, 2, "in2" }, @@ -198,6 +354,10 @@ static const struct stm32_adc_chan_spec stm32f4_adc123_channels[] = { { IIO_VOLTAGE, 13, "in13" }, { IIO_VOLTAGE, 14, "in14" }, { IIO_VOLTAGE, 15, "in15" }, + { IIO_VOLTAGE, 16, "in16" }, + { IIO_VOLTAGE, 17, "in17" }, + { IIO_VOLTAGE, 18, "in18" }, + { IIO_VOLTAGE, 19, "in19" }, }; static const unsigned int stm32f4_adc_resolutions[] = { @@ -205,6 +365,25 @@ static const unsigned int stm32f4_adc_resolutions[] = { 12, 10, 8, 6, }; +static const struct stm32_adc_info stm32f4_adc_info = { + .channels = stm32_adc_channels, + .max_channels = 16, + .resolutions = stm32f4_adc_resolutions, + .num_res = ARRAY_SIZE(stm32f4_adc_resolutions), +}; + +static const unsigned int stm32h7_adc_resolutions[] = { + /* sorted values so the index matches RES[2:0] in STM32H7_ADC_CFGR */ + 16, 14, 12, 10, 8, +}; + +static const struct stm32_adc_info stm32h7_adc_info = { + .channels = stm32_adc_channels, + .max_channels = 20, + .resolutions = stm32h7_adc_resolutions, + .num_res = ARRAY_SIZE(stm32h7_adc_resolutions), +}; + /** * stm32f4_sq - describe regular sequence registers * - L: sequence len (register & bit field) @@ -252,6 +431,69 @@ static struct stm32_adc_trig_info stm32f4_adc_trigs[] = { {}, /* sentinel */ }; +static const struct stm32_adc_regspec stm32f4_adc_regspec = { + .dr = STM32F4_ADC_DR, + .ier_eoc = { STM32F4_ADC_CR1, STM32F4_EOCIE }, + .isr_eoc = { STM32F4_ADC_SR, STM32F4_EOC }, + .sqr = stm32f4_sq, + .exten = { STM32F4_ADC_CR2, STM32F4_EXTEN_MASK, STM32F4_EXTEN_SHIFT }, + .extsel = { STM32F4_ADC_CR2, STM32F4_EXTSEL_MASK, + STM32F4_EXTSEL_SHIFT }, + .res = { STM32F4_ADC_CR1, STM32F4_RES_MASK, STM32F4_RES_SHIFT }, +}; + +static const struct stm32_adc_regs stm32h7_sq[STM32_ADC_MAX_SQ + 1] = { + /* L: len bit field description to be kept as first element */ + { STM32H7_ADC_SQR1, GENMASK(3, 0), 0 }, + /* SQ1..SQ16 registers & bit fields (reg, mask, shift) */ + { STM32H7_ADC_SQR1, GENMASK(10, 6), 6 }, + { STM32H7_ADC_SQR1, GENMASK(16, 12), 12 }, + { STM32H7_ADC_SQR1, GENMASK(22, 18), 18 }, + { STM32H7_ADC_SQR1, GENMASK(28, 24), 24 }, + { STM32H7_ADC_SQR2, GENMASK(4, 0), 0 }, + { STM32H7_ADC_SQR2, GENMASK(10, 6), 6 }, + { STM32H7_ADC_SQR2, GENMASK(16, 12), 12 }, + { STM32H7_ADC_SQR2, GENMASK(22, 18), 18 }, + { STM32H7_ADC_SQR2, GENMASK(28, 24), 24 }, + { STM32H7_ADC_SQR3, GENMASK(4, 0), 0 }, + { STM32H7_ADC_SQR3, GENMASK(10, 6), 6 }, + { STM32H7_ADC_SQR3, GENMASK(16, 12), 12 }, + { STM32H7_ADC_SQR3, GENMASK(22, 18), 18 }, + { STM32H7_ADC_SQR3, GENMASK(28, 24), 24 }, + { STM32H7_ADC_SQR4, GENMASK(4, 0), 0 }, + { STM32H7_ADC_SQR4, GENMASK(10, 6), 6 }, +}; + +/* STM32H7 external trigger sources for all instances */ +static struct stm32_adc_trig_info stm32h7_adc_trigs[] = { + { TIM1_CH1, STM32_EXT0 }, + { TIM1_CH2, STM32_EXT1 }, + { TIM1_CH3, STM32_EXT2 }, + { TIM2_CH2, STM32_EXT3 }, + { TIM3_TRGO, STM32_EXT4 }, + { TIM4_CH4, STM32_EXT5 }, + { TIM8_TRGO, STM32_EXT7 }, + { TIM8_TRGO2, STM32_EXT8 }, + { TIM1_TRGO, STM32_EXT9 }, + { TIM1_TRGO2, STM32_EXT10 }, + { TIM2_TRGO, STM32_EXT11 }, + { TIM4_TRGO, STM32_EXT12 }, + { TIM6_TRGO, STM32_EXT13 }, + { TIM3_CH4, STM32_EXT15 }, + {}, +}; + +static const struct stm32_adc_regspec stm32h7_adc_regspec = { + .dr = STM32H7_ADC_DR, + .ier_eoc = { STM32H7_ADC_IER, STM32H7_EOCIE }, + .isr_eoc = { STM32H7_ADC_ISR, STM32H7_EOC }, + .sqr = stm32h7_sq, + .exten = { STM32H7_ADC_CFGR, STM32H7_EXTEN_MASK, STM32H7_EXTEN_SHIFT }, + .extsel = { STM32H7_ADC_CFGR, STM32H7_EXTSEL_MASK, + STM32H7_EXTSEL_SHIFT }, + .res = { STM32H7_ADC_CFGR, STM32H7_RES_MASK, STM32H7_RES_SHIFT }, +}; + /** * STM32 ADC registers access routines * @adc: stm32 adc instance @@ -265,6 +507,12 @@ static u32 stm32_adc_readl(struct stm32_adc *adc, u32 reg) return readl_relaxed(adc->common->base + adc->offset + reg); } +#define stm32_adc_readl_addr(addr) stm32_adc_readl(adc, addr) + +#define stm32_adc_readl_poll_timeout(reg, val, cond, sleep_us, timeout_us) \ + readx_poll_timeout(stm32_adc_readl_addr, reg, val, \ + cond, sleep_us, timeout_us) + static u16 stm32_adc_readw(struct stm32_adc *adc, u32 reg) { return readw_relaxed(adc->common->base + adc->offset + reg); @@ -299,7 +547,8 @@ static void stm32_adc_clr_bits(struct stm32_adc *adc, u32 reg, u32 bits) */ static void stm32_adc_conv_irq_enable(struct stm32_adc *adc) { - stm32_adc_set_bits(adc, STM32F4_ADC_CR1, STM32F4_EOCIE); + stm32_adc_set_bits(adc, adc->cfg->regs->ier_eoc.reg, + adc->cfg->regs->ier_eoc.mask); }; /** @@ -308,19 +557,22 @@ static void stm32_adc_conv_irq_enable(struct stm32_adc *adc) */ static void stm32_adc_conv_irq_disable(struct stm32_adc *adc) { - stm32_adc_clr_bits(adc, STM32F4_ADC_CR1, STM32F4_EOCIE); + stm32_adc_clr_bits(adc, adc->cfg->regs->ier_eoc.reg, + adc->cfg->regs->ier_eoc.mask); } static void stm32_adc_set_res(struct stm32_adc *adc) { - u32 val = stm32_adc_readl(adc, STM32F4_ADC_CR1); + const struct stm32_adc_regs *res = &adc->cfg->regs->res; + u32 val; - val = (val & ~STM32F4_RES_MASK) | (adc->res << STM32F4_RES_SHIFT); - stm32_adc_writel(adc, STM32F4_ADC_CR1, val); + val = stm32_adc_readl(adc, res->reg); + val = (val & ~res->mask) | (adc->res << res->shift); + stm32_adc_writel(adc, res->reg, val); } /** - * stm32_adc_start_conv() - Start conversions for regular channels. + * stm32f4_adc_start_conv() - Start conversions for regular channels. * @adc: stm32 adc instance * @dma: use dma to transfer conversion result * @@ -329,7 +581,7 @@ static void stm32_adc_set_res(struct stm32_adc *adc) * conversions, in IIO buffer modes. Otherwise, use ADC interrupt with direct * DR read instead (e.g. read_raw, or triggered buffer mode without DMA). */ -static void stm32_adc_start_conv(struct stm32_adc *adc, bool dma) +static void stm32f4_adc_start_conv(struct stm32_adc *adc, bool dma) { stm32_adc_set_bits(adc, STM32F4_ADC_CR1, STM32F4_SCAN); @@ -347,7 +599,7 @@ static void stm32_adc_start_conv(struct stm32_adc *adc, bool dma) stm32_adc_set_bits(adc, STM32F4_ADC_CR2, STM32F4_SWSTART); } -static void stm32_adc_stop_conv(struct stm32_adc *adc) +static void stm32f4_adc_stop_conv(struct stm32_adc *adc) { stm32_adc_clr_bits(adc, STM32F4_ADC_CR2, STM32F4_EXTEN_MASK); stm32_adc_clr_bits(adc, STM32F4_ADC_SR, STM32F4_STRT); @@ -357,6 +609,324 @@ static void stm32_adc_stop_conv(struct stm32_adc *adc) STM32F4_ADON | STM32F4_DMA | STM32F4_DDS); } +static void stm32h7_adc_start_conv(struct stm32_adc *adc, bool dma) +{ + enum stm32h7_adc_dmngt dmngt; + unsigned long flags; + u32 val; + + if (dma) + dmngt = STM32H7_DMNGT_DMA_CIRC; + else + dmngt = STM32H7_DMNGT_DR_ONLY; + + spin_lock_irqsave(&adc->lock, flags); + val = stm32_adc_readl(adc, STM32H7_ADC_CFGR); + val = (val & ~STM32H7_DMNGT_MASK) | (dmngt << STM32H7_DMNGT_SHIFT); + stm32_adc_writel(adc, STM32H7_ADC_CFGR, val); + spin_unlock_irqrestore(&adc->lock, flags); + + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADSTART); +} + +static void stm32h7_adc_stop_conv(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int ret; + u32 val; + + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADSTP); + + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & (STM32H7_ADSTART)), + 100, STM32_ADC_TIMEOUT_US); + if (ret) + dev_warn(&indio_dev->dev, "stop failed\n"); + + stm32_adc_clr_bits(adc, STM32H7_ADC_CFGR, STM32H7_DMNGT_MASK); +} + +static void stm32h7_adc_exit_pwr_down(struct stm32_adc *adc) +{ + /* Exit deep power down, then enable ADC voltage regulator */ + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, STM32H7_DEEPPWD); + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADVREGEN); + + if (adc->common->rate > STM32H7_BOOST_CLKRATE) + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_BOOST); + + /* Wait for startup time */ + usleep_range(10, 20); +} + +static void stm32h7_adc_enter_pwr_down(struct stm32_adc *adc) +{ + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, STM32H7_BOOST); + + /* Setting DEEPPWD disables ADC vreg and clears ADVREGEN */ + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_DEEPPWD); +} + +static int stm32h7_adc_enable(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int ret; + u32 val; + + /* Clear ADRDY by writing one, then enable ADC */ + stm32_adc_set_bits(adc, STM32H7_ADC_ISR, STM32H7_ADRDY); + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADEN); + + /* Poll for ADRDY to be set (after adc startup time) */ + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_ISR, val, + val & STM32H7_ADRDY, + 100, STM32_ADC_TIMEOUT_US); + if (ret) { + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, STM32H7_ADEN); + dev_err(&indio_dev->dev, "Failed to enable ADC\n"); + } + + return ret; +} + +static void stm32h7_adc_disable(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int ret; + u32 val; + + /* Disable ADC and wait until it's effectively disabled */ + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADDIS); + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & STM32H7_ADEN), 100, + STM32_ADC_TIMEOUT_US); + if (ret) + dev_warn(&indio_dev->dev, "Failed to disable\n"); +} + +/** + * stm32h7_adc_read_selfcalib() - read calibration shadow regs, save result + * @adc: stm32 adc instance + */ +static int stm32h7_adc_read_selfcalib(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int i, ret; + u32 lincalrdyw_mask, val; + + /* Enable adc so LINCALRDYW1..6 bits are writable */ + ret = stm32h7_adc_enable(adc); + if (ret) + return ret; + + /* Read linearity calibration */ + lincalrdyw_mask = STM32H7_LINCALRDYW6; + for (i = STM32H7_LINCALFACT_NUM - 1; i >= 0; i--) { + /* Clear STM32H7_LINCALRDYW[6..1]: transfer calib to CALFACT2 */ + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, lincalrdyw_mask); + + /* Poll: wait calib data to be ready in CALFACT2 register */ + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & lincalrdyw_mask), + 100, STM32_ADC_TIMEOUT_US); + if (ret) { + dev_err(&indio_dev->dev, "Failed to read calfact\n"); + goto disable; + } + + val = stm32_adc_readl(adc, STM32H7_ADC_CALFACT2); + adc->cal.lincalfact[i] = (val & STM32H7_LINCALFACT_MASK); + adc->cal.lincalfact[i] >>= STM32H7_LINCALFACT_SHIFT; + + lincalrdyw_mask >>= 1; + } + + /* Read offset calibration */ + val = stm32_adc_readl(adc, STM32H7_ADC_CALFACT); + adc->cal.calfact_s = (val & STM32H7_CALFACT_S_MASK); + adc->cal.calfact_s >>= STM32H7_CALFACT_S_SHIFT; + adc->cal.calfact_d = (val & STM32H7_CALFACT_D_MASK); + adc->cal.calfact_d >>= STM32H7_CALFACT_D_SHIFT; + +disable: + stm32h7_adc_disable(adc); + + return ret; +} + +/** + * stm32h7_adc_restore_selfcalib() - Restore saved self-calibration result + * @adc: stm32 adc instance + * Note: ADC must be enabled, with no on-going conversions. + */ +static int stm32h7_adc_restore_selfcalib(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int i, ret; + u32 lincalrdyw_mask, val; + + val = (adc->cal.calfact_s << STM32H7_CALFACT_S_SHIFT) | + (adc->cal.calfact_d << STM32H7_CALFACT_D_SHIFT); + stm32_adc_writel(adc, STM32H7_ADC_CALFACT, val); + + lincalrdyw_mask = STM32H7_LINCALRDYW6; + for (i = STM32H7_LINCALFACT_NUM - 1; i >= 0; i--) { + /* + * Write saved calibration data to shadow registers: + * Write CALFACT2, and set LINCALRDYW[6..1] bit to trigger + * data write. Then poll to wait for complete transfer. + */ + val = adc->cal.lincalfact[i] << STM32H7_LINCALFACT_SHIFT; + stm32_adc_writel(adc, STM32H7_ADC_CALFACT2, val); + stm32_adc_set_bits(adc, STM32H7_ADC_CR, lincalrdyw_mask); + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + val & lincalrdyw_mask, + 100, STM32_ADC_TIMEOUT_US); + if (ret) { + dev_err(&indio_dev->dev, "Failed to write calfact\n"); + return ret; + } + + /* + * Read back calibration data, has two effects: + * - It ensures bits LINCALRDYW[6..1] are kept cleared + * for next time calibration needs to be restored. + * - BTW, bit clear triggers a read, then check data has been + * correctly written. + */ + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, lincalrdyw_mask); + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & lincalrdyw_mask), + 100, STM32_ADC_TIMEOUT_US); + if (ret) { + dev_err(&indio_dev->dev, "Failed to read calfact\n"); + return ret; + } + val = stm32_adc_readl(adc, STM32H7_ADC_CALFACT2); + if (val != adc->cal.lincalfact[i] << STM32H7_LINCALFACT_SHIFT) { + dev_err(&indio_dev->dev, "calfact not consistent\n"); + return -EIO; + } + + lincalrdyw_mask >>= 1; + } + + return 0; +} + +/** + * Fixed timeout value for ADC calibration. + * worst cases: + * - low clock frequency + * - maximum prescalers + * Calibration requires: + * - 131,072 ADC clock cycle for the linear calibration + * - 20 ADC clock cycle for the offset calibration + * + * Set to 100ms for now + */ +#define STM32H7_ADC_CALIB_TIMEOUT_US 100000 + +/** + * stm32h7_adc_selfcalib() - Procedure to calibrate ADC (from power down) + * @adc: stm32 adc instance + * Exit from power down, calibrate ADC, then return to power down. + */ +static int stm32h7_adc_selfcalib(struct stm32_adc *adc) +{ + struct iio_dev *indio_dev = iio_priv_to_dev(adc); + int ret; + u32 val; + + stm32h7_adc_exit_pwr_down(adc); + + /* + * Select calibration mode: + * - Offset calibration for single ended inputs + * - No linearity calibration (do it later, before reading it) + */ + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, STM32H7_ADCALDIF); + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, STM32H7_ADCALLIN); + + /* Start calibration, then wait for completion */ + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADCAL); + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & STM32H7_ADCAL), 100, + STM32H7_ADC_CALIB_TIMEOUT_US); + if (ret) { + dev_err(&indio_dev->dev, "calibration failed\n"); + goto pwr_dwn; + } + + /* + * Select calibration mode, then start calibration: + * - Offset calibration for differential input + * - Linearity calibration (needs to be done only once for single/diff) + * will run simultaneously with offset calibration. + */ + stm32_adc_set_bits(adc, STM32H7_ADC_CR, + STM32H7_ADCALDIF | STM32H7_ADCALLIN); + stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADCAL); + ret = stm32_adc_readl_poll_timeout(STM32H7_ADC_CR, val, + !(val & STM32H7_ADCAL), 100, + STM32H7_ADC_CALIB_TIMEOUT_US); + if (ret) { + dev_err(&indio_dev->dev, "calibration failed\n"); + goto pwr_dwn; + } + + stm32_adc_clr_bits(adc, STM32H7_ADC_CR, + STM32H7_ADCALDIF | STM32H7_ADCALLIN); + + /* Read calibration result for future reference */ + ret = stm32h7_adc_read_selfcalib(adc); + +pwr_dwn: + stm32h7_adc_enter_pwr_down(adc); + + return ret; +} + +/** + * stm32h7_adc_prepare() - Leave power down mode to enable ADC. + * @adc: stm32 adc instance + * Leave power down mode. + * Enable ADC. + * Restore calibration data. + * Pre-select channels that may be used in PCSEL (required by input MUX / IO). + */ +static int stm32h7_adc_prepare(struct stm32_adc *adc) +{ + int ret; + + stm32h7_adc_exit_pwr_down(adc); + + ret = stm32h7_adc_enable(adc); + if (ret) + goto pwr_dwn; + + ret = stm32h7_adc_restore_selfcalib(adc); + if (ret) + goto disable; + + stm32_adc_writel(adc, STM32H7_ADC_PCSEL, adc->pcsel); + + return 0; + +disable: + stm32h7_adc_disable(adc); +pwr_dwn: + stm32h7_adc_enter_pwr_down(adc); + + return ret; +} + +static void stm32h7_adc_unprepare(struct stm32_adc *adc) +{ + stm32h7_adc_disable(adc); + stm32h7_adc_enter_pwr_down(adc); +} + /** * stm32_adc_conf_scan_seq() - Build regular channels scan sequence * @indio_dev: IIO device @@ -371,6 +941,7 @@ static int stm32_adc_conf_scan_seq(struct iio_dev *indio_dev, const unsigned long *scan_mask) { struct stm32_adc *adc = iio_priv(indio_dev); + const struct stm32_adc_regs *sqr = adc->cfg->regs->sqr; const struct iio_chan_spec *chan; u32 val, bit; int i = 0; @@ -388,20 +959,20 @@ static int stm32_adc_conf_scan_seq(struct iio_dev *indio_dev, dev_dbg(&indio_dev->dev, "%s chan %d to SQ%d\n", __func__, chan->channel, i); - val = stm32_adc_readl(adc, stm32f4_sq[i].reg); - val &= ~stm32f4_sq[i].mask; - val |= chan->channel << stm32f4_sq[i].shift; - stm32_adc_writel(adc, stm32f4_sq[i].reg, val); + val = stm32_adc_readl(adc, sqr[i].reg); + val &= ~sqr[i].mask; + val |= chan->channel << sqr[i].shift; + stm32_adc_writel(adc, sqr[i].reg, val); } if (!i) return -EINVAL; /* Sequence len */ - val = stm32_adc_readl(adc, stm32f4_sq[0].reg); - val &= ~stm32f4_sq[0].mask; - val |= ((i - 1) << stm32f4_sq[0].shift); - stm32_adc_writel(adc, stm32f4_sq[0].reg, val); + val = stm32_adc_readl(adc, sqr[0].reg); + val &= ~sqr[0].mask; + val |= ((i - 1) << sqr[0].shift); + stm32_adc_writel(adc, sqr[0].reg, val); return 0; } @@ -412,19 +983,21 @@ static int stm32_adc_conf_scan_seq(struct iio_dev *indio_dev, * * Returns trigger extsel value, if trig matches, -EINVAL otherwise. */ -static int stm32_adc_get_trig_extsel(struct iio_trigger *trig) +static int stm32_adc_get_trig_extsel(struct iio_dev *indio_dev, + struct iio_trigger *trig) { + struct stm32_adc *adc = iio_priv(indio_dev); int i; /* lookup triggers registered by stm32 timer trigger driver */ - for (i = 0; stm32f4_adc_trigs[i].name; i++) { + for (i = 0; adc->cfg->trigs[i].name; i++) { /** * Checking both stm32 timer trigger type and trig name * should be safe against arbitrary trigger names. */ if (is_stm32_timer_trigger(trig) && - !strcmp(stm32f4_adc_trigs[i].name, trig->name)) { - return stm32f4_adc_trigs[i].extsel; + !strcmp(adc->cfg->trigs[i].name, trig->name)) { + return adc->cfg->trigs[i].extsel; } } @@ -449,7 +1022,7 @@ static int stm32_adc_set_trig(struct iio_dev *indio_dev, int ret; if (trig) { - ret = stm32_adc_get_trig_extsel(trig); + ret = stm32_adc_get_trig_extsel(indio_dev, trig); if (ret < 0) return ret; @@ -459,11 +1032,11 @@ static int stm32_adc_set_trig(struct iio_dev *indio_dev, } spin_lock_irqsave(&adc->lock, flags); - val = stm32_adc_readl(adc, STM32F4_ADC_CR2); - val &= ~(STM32F4_EXTEN_MASK | STM32F4_EXTSEL_MASK); - val |= exten << STM32F4_EXTEN_SHIFT; - val |= extsel << STM32F4_EXTSEL_SHIFT; - stm32_adc_writel(adc, STM32F4_ADC_CR2, val); + val = stm32_adc_readl(adc, adc->cfg->regs->exten.reg); + val &= ~(adc->cfg->regs->exten.mask | adc->cfg->regs->extsel.mask); + val |= exten << adc->cfg->regs->exten.shift; + val |= extsel << adc->cfg->regs->extsel.shift; + stm32_adc_writel(adc, adc->cfg->regs->exten.reg, val); spin_unlock_irqrestore(&adc->lock, flags); return 0; @@ -515,6 +1088,7 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev, int *res) { struct stm32_adc *adc = iio_priv(indio_dev); + const struct stm32_adc_regspec *regs = adc->cfg->regs; long timeout; u32 val; int ret; @@ -523,21 +1097,27 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev, adc->bufi = 0; + if (adc->cfg->prepare) { + ret = adc->cfg->prepare(adc); + if (ret) + return ret; + } + /* Program chan number in regular sequence (SQ1) */ - val = stm32_adc_readl(adc, stm32f4_sq[1].reg); - val &= ~stm32f4_sq[1].mask; - val |= chan->channel << stm32f4_sq[1].shift; - stm32_adc_writel(adc, stm32f4_sq[1].reg, val); + val = stm32_adc_readl(adc, regs->sqr[1].reg); + val &= ~regs->sqr[1].mask; + val |= chan->channel << regs->sqr[1].shift; + stm32_adc_writel(adc, regs->sqr[1].reg, val); /* Set regular sequence len (0 for 1 conversion) */ - stm32_adc_clr_bits(adc, stm32f4_sq[0].reg, stm32f4_sq[0].mask); + stm32_adc_clr_bits(adc, regs->sqr[0].reg, regs->sqr[0].mask); /* Trigger detection disabled (conversion can be launched in SW) */ - stm32_adc_clr_bits(adc, STM32F4_ADC_CR2, STM32F4_EXTEN_MASK); + stm32_adc_clr_bits(adc, regs->exten.reg, regs->exten.mask); stm32_adc_conv_irq_enable(adc); - stm32_adc_start_conv(adc, false); + adc->cfg->start_conv(adc, false); timeout = wait_for_completion_interruptible_timeout( &adc->completion, STM32_ADC_TIMEOUT); @@ -550,10 +1130,13 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev, ret = IIO_VAL_INT; } - stm32_adc_stop_conv(adc); + adc->cfg->stop_conv(adc); stm32_adc_conv_irq_disable(adc); + if (adc->cfg->unprepare) + adc->cfg->unprepare(adc); + return ret; } @@ -590,11 +1173,12 @@ static irqreturn_t stm32_adc_isr(int irq, void *data) { struct stm32_adc *adc = data; struct iio_dev *indio_dev = iio_priv_to_dev(adc); - u32 status = stm32_adc_readl(adc, STM32F4_ADC_SR); + const struct stm32_adc_regspec *regs = adc->cfg->regs; + u32 status = stm32_adc_readl(adc, regs->isr_eoc.reg); - if (status & STM32F4_EOC) { + if (status & regs->isr_eoc.mask) { /* Reading DR also clears EOC status flag */ - adc->buffer[adc->bufi] = stm32_adc_readw(adc, STM32F4_ADC_DR); + adc->buffer[adc->bufi] = stm32_adc_readw(adc, regs->dr); if (iio_buffer_enabled(indio_dev)) { adc->bufi++; if (adc->bufi >= adc->num_conv) { @@ -621,7 +1205,7 @@ static irqreturn_t stm32_adc_isr(int irq, void *data) static int stm32_adc_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig) { - return stm32_adc_get_trig_extsel(trig) < 0 ? -EINVAL : 0; + return stm32_adc_get_trig_extsel(indio_dev, trig) < 0 ? -EINVAL : 0; } static int stm32_adc_set_watermark(struct iio_dev *indio_dev, unsigned int val) @@ -777,10 +1361,16 @@ static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev) struct stm32_adc *adc = iio_priv(indio_dev); int ret; + if (adc->cfg->prepare) { + ret = adc->cfg->prepare(adc); + if (ret) + return ret; + } + ret = stm32_adc_set_trig(indio_dev, indio_dev->trig); if (ret) { dev_err(&indio_dev->dev, "Can't set trigger\n"); - return ret; + goto err_unprepare; } ret = stm32_adc_dma_start(indio_dev); @@ -799,7 +1389,7 @@ static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev) if (!adc->dma_chan) stm32_adc_conv_irq_enable(adc); - stm32_adc_start_conv(adc, !!adc->dma_chan); + adc->cfg->start_conv(adc, !!adc->dma_chan); return 0; @@ -808,6 +1398,9 @@ err_stop_dma: dmaengine_terminate_all(adc->dma_chan); err_clr_trig: stm32_adc_set_trig(indio_dev, NULL); +err_unprepare: + if (adc->cfg->unprepare) + adc->cfg->unprepare(adc); return ret; } @@ -817,7 +1410,7 @@ static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev) struct stm32_adc *adc = iio_priv(indio_dev); int ret; - stm32_adc_stop_conv(adc); + adc->cfg->stop_conv(adc); if (!adc->dma_chan) stm32_adc_conv_irq_disable(adc); @@ -831,6 +1424,9 @@ static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev) if (stm32_adc_set_trig(indio_dev, NULL)) dev_err(&indio_dev->dev, "Can't clear trigger\n"); + if (adc->cfg->unprepare) + adc->cfg->unprepare(adc); + return ret; } @@ -895,12 +1491,12 @@ static int stm32_adc_of_get_resolution(struct iio_dev *indio_dev) u32 res; if (of_property_read_u32(node, "assigned-resolution-bits", &res)) - res = stm32f4_adc_resolutions[0]; + res = adc->cfg->adc_info->resolutions[0]; - for (i = 0; i < ARRAY_SIZE(stm32f4_adc_resolutions); i++) - if (res == stm32f4_adc_resolutions[i]) + for (i = 0; i < adc->cfg->adc_info->num_res; i++) + if (res == adc->cfg->adc_info->resolutions[i]) break; - if (i >= ARRAY_SIZE(stm32f4_adc_resolutions)) { + if (i >= adc->cfg->adc_info->num_res) { dev_err(&indio_dev->dev, "Bad resolution: %u bits\n", res); return -EINVAL; } @@ -926,14 +1522,19 @@ static void stm32_adc_chan_init_one(struct iio_dev *indio_dev, chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); chan->scan_type.sign = 'u'; - chan->scan_type.realbits = stm32f4_adc_resolutions[adc->res]; + chan->scan_type.realbits = adc->cfg->adc_info->resolutions[adc->res]; chan->scan_type.storagebits = 16; chan->ext_info = stm32_adc_ext_info; + + /* pre-build selected channels mask */ + adc->pcsel |= BIT(chan->channel); } static int stm32_adc_chan_of_init(struct iio_dev *indio_dev) { struct device_node *node = indio_dev->dev.of_node; + struct stm32_adc *adc = iio_priv(indio_dev); + const struct stm32_adc_info *adc_info = adc->cfg->adc_info; struct property *prop; const __be32 *cur; struct iio_chan_spec *channels; @@ -942,7 +1543,7 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev) num_channels = of_property_count_u32_elems(node, "st,adc-channels"); if (num_channels < 0 || - num_channels >= ARRAY_SIZE(stm32f4_adc123_channels)) { + num_channels >= adc_info->max_channels) { dev_err(&indio_dev->dev, "Bad st,adc-channels?\n"); return num_channels < 0 ? num_channels : -EINVAL; } @@ -953,12 +1554,12 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev) return -ENOMEM; of_property_for_each_u32(node, "st,adc-channels", prop, cur, val) { - if (val >= ARRAY_SIZE(stm32f4_adc123_channels)) { + if (val >= adc_info->max_channels) { dev_err(&indio_dev->dev, "Invalid channel %d\n", val); return -EINVAL; } stm32_adc_chan_init_one(indio_dev, &channels[scan_index], - &stm32f4_adc123_channels[val], + &adc_info->channels[val], scan_index); scan_index++; } @@ -990,7 +1591,7 @@ static int stm32_adc_dma_request(struct iio_dev *indio_dev) /* Configure DMA channel to read data register */ memset(&config, 0, sizeof(config)); config.src_addr = (dma_addr_t)adc->common->phys_base; - config.src_addr += adc->offset + STM32F4_ADC_DR; + config.src_addr += adc->offset + adc->cfg->regs->dr; config.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; ret = dmaengine_slave_config(adc->dma_chan, &config); @@ -1011,6 +1612,7 @@ err_release: static int stm32_adc_probe(struct platform_device *pdev) { struct iio_dev *indio_dev; + struct device *dev = &pdev->dev; struct stm32_adc *adc; int ret; @@ -1025,6 +1627,8 @@ static int stm32_adc_probe(struct platform_device *pdev) adc->common = dev_get_drvdata(pdev->dev.parent); spin_lock_init(&adc->lock); init_completion(&adc->completion); + adc->cfg = (const struct stm32_adc_cfg *) + of_match_device(dev->driver->of_match_table, dev)->data; indio_dev->name = dev_name(&pdev->dev); indio_dev->dev.parent = &pdev->dev; @@ -1055,14 +1659,21 @@ static int stm32_adc_probe(struct platform_device *pdev) adc->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(adc->clk)) { - dev_err(&pdev->dev, "Can't get clock\n"); - return PTR_ERR(adc->clk); + ret = PTR_ERR(adc->clk); + if (ret == -ENOENT && !adc->cfg->clk_required) { + adc->clk = NULL; + } else { + dev_err(&pdev->dev, "Can't get clock\n"); + return ret; + } } - ret = clk_prepare_enable(adc->clk); - if (ret < 0) { - dev_err(&pdev->dev, "clk enable failed\n"); - return ret; + if (adc->clk) { + ret = clk_prepare_enable(adc->clk); + if (ret < 0) { + dev_err(&pdev->dev, "clk enable failed\n"); + return ret; + } } ret = stm32_adc_of_get_resolution(indio_dev); @@ -1070,6 +1681,12 @@ static int stm32_adc_probe(struct platform_device *pdev) goto err_clk_disable; stm32_adc_set_res(adc); + if (adc->cfg->selfcalib) { + ret = adc->cfg->selfcalib(adc); + if (ret) + goto err_clk_disable; + } + ret = stm32_adc_chan_of_init(indio_dev); if (ret < 0) goto err_clk_disable; @@ -1106,7 +1723,8 @@ err_dma_disable: dma_release_channel(adc->dma_chan); } err_clk_disable: - clk_disable_unprepare(adc->clk); + if (adc->clk) + clk_disable_unprepare(adc->clk); return ret; } @@ -1124,13 +1742,35 @@ static int stm32_adc_remove(struct platform_device *pdev) adc->rx_buf, adc->rx_dma_buf); dma_release_channel(adc->dma_chan); } - clk_disable_unprepare(adc->clk); + if (adc->clk) + clk_disable_unprepare(adc->clk); return 0; } +static const struct stm32_adc_cfg stm32f4_adc_cfg = { + .regs = &stm32f4_adc_regspec, + .adc_info = &stm32f4_adc_info, + .trigs = stm32f4_adc_trigs, + .clk_required = true, + .start_conv = stm32f4_adc_start_conv, + .stop_conv = stm32f4_adc_stop_conv, +}; + +static const struct stm32_adc_cfg stm32h7_adc_cfg = { + .regs = &stm32h7_adc_regspec, + .adc_info = &stm32h7_adc_info, + .trigs = stm32h7_adc_trigs, + .selfcalib = stm32h7_adc_selfcalib, + .start_conv = stm32h7_adc_start_conv, + .stop_conv = stm32h7_adc_stop_conv, + .prepare = stm32h7_adc_prepare, + .unprepare = stm32h7_adc_unprepare, +}; + static const struct of_device_id stm32_adc_of_match[] = { - { .compatible = "st,stm32f4-adc" }, + { .compatible = "st,stm32f4-adc", .data = (void *)&stm32f4_adc_cfg }, + { .compatible = "st,stm32h7-adc", .data = (void *)&stm32h7_adc_cfg }, {}, }; MODULE_DEVICE_TABLE(of, stm32_adc_of_match); diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c new file mode 100644 index 000000000000..a355121c11a4 --- /dev/null +++ b/drivers/iio/adc/ti-adc084s021.c @@ -0,0 +1,275 @@ +/** + * Copyright (C) 2017 Axis Communications AB + * + * Driver for Texas Instruments' ADC084S021 ADC chip. + * Datasheets can be found here: + * http://www.ti.com/lit/ds/symlink/adc084s021.pdf + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/err.h> +#include <linux/spi/spi.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/regulator/consumer.h> + +#define ADC084S021_DRIVER_NAME "adc084s021" + +struct adc084s021 { + struct spi_device *spi; + struct spi_message message; + struct spi_transfer spi_trans; + struct regulator *reg; + struct mutex lock; + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache line. + */ + u16 tx_buf[4] ____cacheline_aligned; + __be16 rx_buf[5]; /* First 16-bits are trash */ +}; + +#define ADC084S021_VOLTAGE_CHANNEL(num) \ + { \ + .type = IIO_VOLTAGE, \ + .channel = (num), \ + .indexed = 1, \ + .scan_index = (num), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = 8, \ + .storagebits = 16, \ + .shift = 4, \ + .endianness = IIO_BE, \ + }, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ + } + +static const struct iio_chan_spec adc084s021_channels[] = { + ADC084S021_VOLTAGE_CHANNEL(0), + ADC084S021_VOLTAGE_CHANNEL(1), + ADC084S021_VOLTAGE_CHANNEL(2), + ADC084S021_VOLTAGE_CHANNEL(3), + IIO_CHAN_SOFT_TIMESTAMP(4), +}; + +/** + * Read an ADC channel and return its value. + * + * @adc: The ADC SPI data. + * @data: Buffer for converted data. + */ +static int adc084s021_adc_conversion(struct adc084s021 *adc, void *data) +{ + int n_words = (adc->spi_trans.len >> 1) - 1; /* Discard first word */ + int ret, i = 0; + u16 *p = data; + + /* Do the transfer */ + ret = spi_sync(adc->spi, &adc->message); + if (ret < 0) + return ret; + + for (; i < n_words; i++) + *(p + i) = adc->rx_buf[i + 1]; + + return ret; +} + +static int adc084s021_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int *val, + int *val2, long mask) +{ + struct adc084s021 *adc = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret < 0) + return ret; + + ret = regulator_enable(adc->reg); + if (ret) { + iio_device_release_direct_mode(indio_dev); + return ret; + } + + adc->tx_buf[0] = channel->channel << 3; + ret = adc084s021_adc_conversion(adc, val); + iio_device_release_direct_mode(indio_dev); + regulator_disable(adc->reg); + if (ret < 0) + return ret; + + *val = be16_to_cpu(*val); + *val = (*val >> channel->scan_type.shift) & 0xff; + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + ret = regulator_enable(adc->reg); + if (ret) + return ret; + + ret = regulator_get_voltage(adc->reg); + regulator_disable(adc->reg); + if (ret < 0) + return ret; + + *val = ret / 1000; + + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +/** + * Read enabled ADC channels and push data to the buffer. + * + * @irq: The interrupt number (not used). + * @pollfunc: Pointer to the poll func. + */ +static irqreturn_t adc084s021_buffer_trigger_handler(int irq, void *pollfunc) +{ + struct iio_poll_func *pf = pollfunc; + struct iio_dev *indio_dev = pf->indio_dev; + struct adc084s021 *adc = iio_priv(indio_dev); + __be16 data[8] = {0}; /* 4 * 16-bit words of data + 8 bytes timestamp */ + + mutex_lock(&adc->lock); + + if (adc084s021_adc_conversion(adc, &data) < 0) + dev_err(&adc->spi->dev, "Failed to read data\n"); + + iio_push_to_buffers_with_timestamp(indio_dev, data, + iio_get_time_ns(indio_dev)); + mutex_unlock(&adc->lock); + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int adc084s021_buffer_preenable(struct iio_dev *indio_dev) +{ + struct adc084s021 *adc = iio_priv(indio_dev); + int scan_index; + int i = 0; + + for_each_set_bit(scan_index, indio_dev->active_scan_mask, + indio_dev->masklength) { + const struct iio_chan_spec *channel = + &indio_dev->channels[scan_index]; + adc->tx_buf[i++] = channel->channel << 3; + } + adc->spi_trans.len = 2 + (i * sizeof(__be16)); /* Trash + channels */ + + return regulator_enable(adc->reg); +} + +static int adc084s021_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct adc084s021 *adc = iio_priv(indio_dev); + + adc->spi_trans.len = 4; /* Trash + single channel */ + + return regulator_disable(adc->reg); +} + +static const struct iio_info adc084s021_info = { + .read_raw = adc084s021_read_raw, + .driver_module = THIS_MODULE, +}; + +static const struct iio_buffer_setup_ops adc084s021_buffer_setup_ops = { + .preenable = adc084s021_buffer_preenable, + .postenable = iio_triggered_buffer_postenable, + .predisable = iio_triggered_buffer_predisable, + .postdisable = adc084s021_buffer_postdisable, +}; + +static int adc084s021_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct adc084s021 *adc; + int ret; + + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc)); + if (!indio_dev) { + dev_err(&spi->dev, "Failed to allocate IIO device\n"); + return -ENOMEM; + } + + adc = iio_priv(indio_dev); + adc->spi = spi; + + /* Connect the SPI device and the iio dev */ + spi_set_drvdata(spi, indio_dev); + + /* Initiate the Industrial I/O device */ + indio_dev->dev.parent = &spi->dev; + indio_dev->dev.of_node = spi->dev.of_node; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &adc084s021_info; + indio_dev->channels = adc084s021_channels; + indio_dev->num_channels = ARRAY_SIZE(adc084s021_channels); + + /* Create SPI transfer for channel reads */ + adc->spi_trans.tx_buf = adc->tx_buf; + adc->spi_trans.rx_buf = adc->rx_buf; + adc->spi_trans.len = 4; /* Trash + single channel */ + spi_message_init_with_transfers(&adc->message, &adc->spi_trans, 1); + + adc->reg = devm_regulator_get(&spi->dev, "vref"); + if (IS_ERR(adc->reg)) + return PTR_ERR(adc->reg); + + mutex_init(&adc->lock); + + /* Setup triggered buffer with pollfunction */ + ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL, + adc084s021_buffer_trigger_handler, + &adc084s021_buffer_setup_ops); + if (ret) { + dev_err(&spi->dev, "Failed to setup triggered buffer\n"); + return ret; + } + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static const struct of_device_id adc084s021_of_match[] = { + { .compatible = "ti,adc084s021", }, + {}, +}; +MODULE_DEVICE_TABLE(of, adc084s021_of_match); + +static const struct spi_device_id adc084s021_id[] = { + { ADC084S021_DRIVER_NAME, 0}, + {} +}; +MODULE_DEVICE_TABLE(spi, adc084s021_id); + +static struct spi_driver adc084s021_driver = { + .driver = { + .name = ADC084S021_DRIVER_NAME, + .of_match_table = of_match_ptr(adc084s021_of_match), + }, + .probe = adc084s021_probe, + .id_table = adc084s021_id, +}; +module_spi_driver(adc084s021_driver); + +MODULE_AUTHOR("Mårten Lindahl <martenli@axis.com>"); +MODULE_DESCRIPTION("Texas Instruments ADC084S021"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("1.0"); diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c new file mode 100644 index 000000000000..de4e5ac98c6e --- /dev/null +++ b/drivers/iio/adc/ti-adc108s102.c @@ -0,0 +1,348 @@ +/* + * TI ADC108S102 SPI ADC driver + * + * Copyright (c) 2013-2015 Intel Corporation. + * Copyright (c) 2017 Siemens AG + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * This IIO device driver is designed to work with the following + * analog to digital converters from Texas Instruments: + * ADC108S102 + * ADC128S102 + * The communication with ADC chip is via the SPI bus (mode 3). + */ + +#include <linux/acpi.h> +#include <linux/iio/iio.h> +#include <linux/iio/buffer.h> +#include <linux/iio/types.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +/* + * In case of ACPI, we use the hard-wired 5000 mV of the Galileo and IOT2000 + * boards as default for the reference pin VA. Device tree users encode that + * via the vref-supply regulator. + */ +#define ADC108S102_VA_MV_ACPI_DEFAULT 5000 + +/* + * Defining the ADC resolution being 12 bits, we can use the same driver for + * both ADC108S102 (10 bits resolution) and ADC128S102 (12 bits resolution) + * chips. The ADC108S102 effectively returns a 12-bit result with the 2 + * least-significant bits unset. + */ +#define ADC108S102_BITS 12 +#define ADC108S102_MAX_CHANNELS 8 + +/* + * 16-bit SPI command format: + * [15:14] Ignored + * [13:11] 3-bit channel address + * [10:0] Ignored + */ +#define ADC108S102_CMD(ch) ((u16)(ch) << 11) + +/* + * 16-bit SPI response format: + * [15:12] Zeros + * [11:0] 12-bit ADC sample (for ADC108S102, [1:0] will always be 0). + */ +#define ADC108S102_RES_DATA(res) ((u16)res & GENMASK(11, 0)) + +struct adc108s102_state { + struct spi_device *spi; + struct regulator *reg; + u32 va_millivolt; + /* SPI transfer used by triggered buffer handler*/ + struct spi_transfer ring_xfer; + /* SPI transfer used by direct scan */ + struct spi_transfer scan_single_xfer; + /* SPI message used by ring_xfer SPI transfer */ + struct spi_message ring_msg; + /* SPI message used by scan_single_xfer SPI transfer */ + struct spi_message scan_single_msg; + + /* + * SPI message buffers: + * tx_buf: |C0|C1|C2|C3|C4|C5|C6|C7|XX| + * rx_buf: |XX|R0|R1|R2|R3|R4|R5|R6|R7|tt|tt|tt|tt| + * + * tx_buf: 8 channel read commands, plus 1 dummy command + * rx_buf: 1 dummy response, 8 channel responses, plus 64-bit timestamp + */ + __be16 rx_buf[13] ____cacheline_aligned; + __be16 tx_buf[9] ____cacheline_aligned; +}; + +#define ADC108S102_V_CHAN(index) \ + { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = index, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE), \ + .address = index, \ + .scan_index = index, \ + .scan_type = { \ + .sign = 'u', \ + .realbits = ADC108S102_BITS, \ + .storagebits = 16, \ + .endianness = IIO_BE, \ + }, \ + } + +static const struct iio_chan_spec adc108s102_channels[] = { + ADC108S102_V_CHAN(0), + ADC108S102_V_CHAN(1), + ADC108S102_V_CHAN(2), + ADC108S102_V_CHAN(3), + ADC108S102_V_CHAN(4), + ADC108S102_V_CHAN(5), + ADC108S102_V_CHAN(6), + ADC108S102_V_CHAN(7), + IIO_CHAN_SOFT_TIMESTAMP(8), +}; + +static int adc108s102_update_scan_mode(struct iio_dev *indio_dev, + unsigned long const *active_scan_mask) +{ + struct adc108s102_state *st = iio_priv(indio_dev); + unsigned int bit, cmds; + + /* + * Fill in the first x shorts of tx_buf with the number of channels + * enabled for sampling by the triggered buffer. + */ + cmds = 0; + for_each_set_bit(bit, active_scan_mask, ADC108S102_MAX_CHANNELS) + st->tx_buf[cmds++] = cpu_to_be16(ADC108S102_CMD(bit)); + + /* One dummy command added, to clock in the last response */ + st->tx_buf[cmds++] = 0x00; + + /* build SPI ring message */ + st->ring_xfer.tx_buf = &st->tx_buf[0]; + st->ring_xfer.rx_buf = &st->rx_buf[0]; + st->ring_xfer.len = cmds * sizeof(st->tx_buf[0]); + + spi_message_init_with_transfers(&st->ring_msg, &st->ring_xfer, 1); + + return 0; +} + +static irqreturn_t adc108s102_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct adc108s102_state *st = iio_priv(indio_dev); + int ret; + + ret = spi_sync(st->spi, &st->ring_msg); + if (ret < 0) + goto out_notify; + + /* Skip the dummy response in the first slot */ + iio_push_to_buffers_with_timestamp(indio_dev, + (u8 *)&st->rx_buf[1], + iio_get_time_ns(indio_dev)); + +out_notify: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + +static int adc108s102_scan_direct(struct adc108s102_state *st, unsigned int ch) +{ + int ret; + + st->tx_buf[0] = cpu_to_be16(ADC108S102_CMD(ch)); + ret = spi_sync(st->spi, &st->scan_single_msg); + if (ret) + return ret; + + /* Skip the dummy response in the first slot */ + return be16_to_cpu(st->rx_buf[1]); +} + +static int adc108s102_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long m) +{ + struct adc108s102_state *st = iio_priv(indio_dev); + int ret; + + switch (m) { + case IIO_CHAN_INFO_RAW: + ret = iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + + ret = adc108s102_scan_direct(st, chan->address); + + iio_device_release_direct_mode(indio_dev); + + if (ret < 0) + return ret; + + *val = ADC108S102_RES_DATA(ret); + + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + if (chan->type != IIO_VOLTAGE) + break; + + *val = st->va_millivolt; + *val2 = chan->scan_type.realbits; + + return IIO_VAL_FRACTIONAL_LOG2; + default: + break; + } + + return -EINVAL; +} + +static const struct iio_info adc108s102_info = { + .read_raw = &adc108s102_read_raw, + .update_scan_mode = &adc108s102_update_scan_mode, + .driver_module = THIS_MODULE, +}; + +static int adc108s102_probe(struct spi_device *spi) +{ + struct adc108s102_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + if (ACPI_COMPANION(&spi->dev)) { + st->va_millivolt = ADC108S102_VA_MV_ACPI_DEFAULT; + } else { + st->reg = devm_regulator_get(&spi->dev, "vref"); + if (IS_ERR(st->reg)) + return PTR_ERR(st->reg); + + ret = regulator_enable(st->reg); + if (ret < 0) { + dev_err(&spi->dev, "Cannot enable vref regulator\n"); + return ret; + } + + ret = regulator_get_voltage(st->reg); + if (ret < 0) { + dev_err(&spi->dev, "vref get voltage failed\n"); + return ret; + } + + st->va_millivolt = ret / 1000; + } + + spi_set_drvdata(spi, indio_dev); + st->spi = spi; + + indio_dev->name = spi->modalias; + indio_dev->dev.parent = &spi->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = adc108s102_channels; + indio_dev->num_channels = ARRAY_SIZE(adc108s102_channels); + indio_dev->info = &adc108s102_info; + + /* Setup default message */ + st->scan_single_xfer.tx_buf = st->tx_buf; + st->scan_single_xfer.rx_buf = st->rx_buf; + st->scan_single_xfer.len = 2 * sizeof(st->tx_buf[0]); + + spi_message_init_with_transfers(&st->scan_single_msg, + &st->scan_single_xfer, 1); + + ret = iio_triggered_buffer_setup(indio_dev, NULL, + &adc108s102_trigger_handler, NULL); + if (ret) + goto error_disable_reg; + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&spi->dev, "Failed to register IIO device\n"); + goto error_cleanup_triggered_buffer; + } + return 0; + +error_cleanup_triggered_buffer: + iio_triggered_buffer_cleanup(indio_dev); + +error_disable_reg: + regulator_disable(st->reg); + + return ret; +} + +static int adc108s102_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct adc108s102_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); + + regulator_disable(st->reg); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id adc108s102_of_match[] = { + { .compatible = "ti,adc108s102" }, + { } +}; +MODULE_DEVICE_TABLE(of, adc108s102_of_match); +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id adc108s102_acpi_ids[] = { + { "INT3495", 0 }, + { } +}; +MODULE_DEVICE_TABLE(acpi, adc108s102_acpi_ids); +#endif + +static const struct spi_device_id adc108s102_id[] = { + { "adc108s102", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, adc108s102_id); + +static struct spi_driver adc108s102_driver = { + .driver = { + .name = "adc108s102", + .of_match_table = of_match_ptr(adc108s102_of_match), + .acpi_match_table = ACPI_PTR(adc108s102_acpi_ids), + }, + .probe = adc108s102_probe, + .remove = adc108s102_remove, + .id_table = adc108s102_id, +}; +module_spi_driver(adc108s102_driver); + +MODULE_AUTHOR("Bogdan Pricop <bogdan.pricop@emutex.com>"); +MODULE_DESCRIPTION("Texas Instruments ADC108S102 and ADC128S102 driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c index f76d979fb7e8..884b8e461b17 100644 --- a/drivers/iio/adc/ti-ads1015.c +++ b/drivers/iio/adc/ti-ads1015.c @@ -23,7 +23,7 @@ #include <linux/mutex.h> #include <linux/delay.h> -#include <linux/i2c/ads1015.h> +#include <linux/platform_data/ads1015.h> #include <linux/iio/iio.h> #include <linux/iio/types.h> diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c index 0c74869a540a..bd3d37fc2144 100644 --- a/drivers/iio/adc/twl4030-madc.c +++ b/drivers/iio/adc/twl4030-madc.c @@ -36,7 +36,6 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/i2c/twl.h> -#include <linux/i2c/twl4030-madc.h> #include <linux/module.h> #include <linux/stddef.h> #include <linux/mutex.h> @@ -49,9 +48,121 @@ #include <linux/iio/iio.h> +#define TWL4030_MADC_MAX_CHANNELS 16 + +#define TWL4030_MADC_CTRL1 0x00 +#define TWL4030_MADC_CTRL2 0x01 + +#define TWL4030_MADC_RTSELECT_LSB 0x02 +#define TWL4030_MADC_SW1SELECT_LSB 0x06 +#define TWL4030_MADC_SW2SELECT_LSB 0x0A + +#define TWL4030_MADC_RTAVERAGE_LSB 0x04 +#define TWL4030_MADC_SW1AVERAGE_LSB 0x08 +#define TWL4030_MADC_SW2AVERAGE_LSB 0x0C + +#define TWL4030_MADC_CTRL_SW1 0x12 +#define TWL4030_MADC_CTRL_SW2 0x13 + +#define TWL4030_MADC_RTCH0_LSB 0x17 +#define TWL4030_MADC_GPCH0_LSB 0x37 + +#define TWL4030_MADC_MADCON (1 << 0) /* MADC power on */ +#define TWL4030_MADC_BUSY (1 << 0) /* MADC busy */ +/* MADC conversion completion */ +#define TWL4030_MADC_EOC_SW (1 << 1) +/* MADC SWx start conversion */ +#define TWL4030_MADC_SW_START (1 << 5) +#define TWL4030_MADC_ADCIN0 (1 << 0) +#define TWL4030_MADC_ADCIN1 (1 << 1) +#define TWL4030_MADC_ADCIN2 (1 << 2) +#define TWL4030_MADC_ADCIN3 (1 << 3) +#define TWL4030_MADC_ADCIN4 (1 << 4) +#define TWL4030_MADC_ADCIN5 (1 << 5) +#define TWL4030_MADC_ADCIN6 (1 << 6) +#define TWL4030_MADC_ADCIN7 (1 << 7) +#define TWL4030_MADC_ADCIN8 (1 << 8) +#define TWL4030_MADC_ADCIN9 (1 << 9) +#define TWL4030_MADC_ADCIN10 (1 << 10) +#define TWL4030_MADC_ADCIN11 (1 << 11) +#define TWL4030_MADC_ADCIN12 (1 << 12) +#define TWL4030_MADC_ADCIN13 (1 << 13) +#define TWL4030_MADC_ADCIN14 (1 << 14) +#define TWL4030_MADC_ADCIN15 (1 << 15) + +/* Fixed channels */ +#define TWL4030_MADC_BTEMP TWL4030_MADC_ADCIN1 +#define TWL4030_MADC_VBUS TWL4030_MADC_ADCIN8 +#define TWL4030_MADC_VBKB TWL4030_MADC_ADCIN9 +#define TWL4030_MADC_ICHG TWL4030_MADC_ADCIN10 +#define TWL4030_MADC_VCHG TWL4030_MADC_ADCIN11 +#define TWL4030_MADC_VBAT TWL4030_MADC_ADCIN12 + +/* Step size and prescaler ratio */ +#define TEMP_STEP_SIZE 147 +#define TEMP_PSR_R 100 +#define CURR_STEP_SIZE 147 +#define CURR_PSR_R1 44 +#define CURR_PSR_R2 88 + +#define TWL4030_BCI_BCICTL1 0x23 +#define TWL4030_BCI_CGAIN 0x020 +#define TWL4030_BCI_MESBAT (1 << 1) +#define TWL4030_BCI_TYPEN (1 << 4) +#define TWL4030_BCI_ITHEN (1 << 3) + +#define REG_BCICTL2 0x024 +#define TWL4030_BCI_ITHSENS 0x007 + +/* Register and bits for GPBR1 register */ +#define TWL4030_REG_GPBR1 0x0c +#define TWL4030_GPBR1_MADC_HFCLK_EN (1 << 7) + #define TWL4030_USB_SEL_MADC_MCPC (1<<3) #define TWL4030_USB_CARKIT_ANA_CTRL 0xBB +struct twl4030_madc_conversion_method { + u8 sel; + u8 avg; + u8 rbase; + u8 ctrl; +}; + +/** + * struct twl4030_madc_request - madc request packet for channel conversion + * @channels: 16 bit bitmap for individual channels + * @do_avg: sample the input channel for 4 consecutive cycles + * @method: RT, SW1, SW2 + * @type: Polling or interrupt based method + * @active: Flag if request is active + * @result_pending: Flag from irq handler, that result is ready + * @raw: Return raw value, do not convert it + * @rbuf: Result buffer + */ +struct twl4030_madc_request { + unsigned long channels; + bool do_avg; + u16 method; + u16 type; + bool active; + bool result_pending; + bool raw; + int rbuf[TWL4030_MADC_MAX_CHANNELS]; +}; + +enum conversion_methods { + TWL4030_MADC_RT, + TWL4030_MADC_SW1, + TWL4030_MADC_SW2, + TWL4030_MADC_NUM_METHODS +}; + +enum sample_type { + TWL4030_MADC_WAIT, + TWL4030_MADC_IRQ_ONESHOT, + TWL4030_MADC_IRQ_REARM +}; + /** * struct twl4030_madc_data - a container for madc info * @dev: Pointer to device structure for madc @@ -72,6 +183,8 @@ struct twl4030_madc_data { u8 isr; }; +static int twl4030_madc_conversion(struct twl4030_madc_request *req); + static int twl4030_madc_read(struct iio_dev *iio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long mask) @@ -84,7 +197,6 @@ static int twl4030_madc_read(struct iio_dev *iio_dev, req.channels = BIT(chan->channel); req.active = false; - req.func_cb = NULL; req.type = TWL4030_MADC_WAIT; req.raw = !(mask == IIO_CHAN_INFO_PROCESSED); req.do_avg = (mask == IIO_CHAN_INFO_AVERAGE_RAW); @@ -341,37 +453,6 @@ static int twl4030_madc_read_channels(struct twl4030_madc_data *madc, } /* - * Enables irq. - * @madc - pointer to twl4030_madc_data struct - * @id - irq number to be enabled - * can take one of TWL4030_MADC_RT, TWL4030_MADC_SW1, TWL4030_MADC_SW2 - * corresponding to RT, SW1, SW2 conversion requests. - * If the i2c read fails it returns an error else returns 0. - */ -static int twl4030_madc_enable_irq(struct twl4030_madc_data *madc, u8 id) -{ - u8 val; - int ret; - - ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &val, madc->imr); - if (ret) { - dev_err(madc->dev, "unable to read imr register 0x%X\n", - madc->imr); - return ret; - } - - val &= ~(1 << id); - ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, val, madc->imr); - if (ret) { - dev_err(madc->dev, - "unable to write imr register 0x%X\n", madc->imr); - return ret; - } - - return 0; -} - -/* * Disables irq. * @madc - pointer to twl4030_madc_data struct * @id - irq number to be disabled @@ -440,11 +521,6 @@ static irqreturn_t twl4030_madc_threaded_irq_handler(int irq, void *_madc) /* Read results */ len = twl4030_madc_read_channels(madc, method->rbase, r->channels, r->rbuf, r->raw); - /* Return results to caller */ - if (r->func_cb != NULL) { - r->func_cb(len, r->channels, r->rbuf); - r->func_cb = NULL; - } /* Free request */ r->result_pending = 0; r->active = 0; @@ -466,11 +542,6 @@ err_i2c: /* Read results */ len = twl4030_madc_read_channels(madc, method->rbase, r->channels, r->rbuf, r->raw); - /* Return results to caller */ - if (r->func_cb != NULL) { - r->func_cb(len, r->channels, r->rbuf); - r->func_cb = NULL; - } /* Free request */ r->result_pending = 0; r->active = 0; @@ -480,23 +551,6 @@ err_i2c: return IRQ_HANDLED; } -static int twl4030_madc_set_irq(struct twl4030_madc_data *madc, - struct twl4030_madc_request *req) -{ - struct twl4030_madc_request *p; - int ret; - - p = &madc->requests[req->method]; - memcpy(p, req, sizeof(*req)); - ret = twl4030_madc_enable_irq(madc, req->method); - if (ret < 0) { - dev_err(madc->dev, "enable irq failed!!\n"); - return ret; - } - - return 0; -} - /* * Function which enables the madc conversion * by writing to the control register. @@ -568,7 +622,7 @@ static int twl4030_madc_wait_conversion_ready(struct twl4030_madc_data *madc, * be a negative error value in the corresponding array element. * returns 0 if succeeds else error value */ -int twl4030_madc_conversion(struct twl4030_madc_request *req) +static int twl4030_madc_conversion(struct twl4030_madc_request *req) { const struct twl4030_madc_conversion_method *method; int ret; @@ -605,17 +659,6 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req) goto out; } } - if (req->type == TWL4030_MADC_IRQ_ONESHOT && req->func_cb != NULL) { - ret = twl4030_madc_set_irq(twl4030_madc, req); - if (ret < 0) - goto out; - ret = twl4030_madc_start_conversion(twl4030_madc, req->method); - if (ret < 0) - goto out; - twl4030_madc->requests[req->method].active = 1; - ret = 0; - goto out; - } /* With RT method we should not be here anymore */ if (req->method == TWL4030_MADC_RT) { ret = -EINVAL; @@ -640,28 +683,6 @@ out: return ret; } -EXPORT_SYMBOL_GPL(twl4030_madc_conversion); - -int twl4030_get_madc_conversion(int channel_no) -{ - struct twl4030_madc_request req; - int temp = 0; - int ret; - - req.channels = (1 << channel_no); - req.method = TWL4030_MADC_SW2; - req.active = 0; - req.raw = 0; - req.func_cb = NULL; - ret = twl4030_madc_conversion(&req); - if (ret < 0) - return ret; - if (req.rbuf[channel_no] > 0) - temp = req.rbuf[channel_no]; - - return temp; -} -EXPORT_SYMBOL_GPL(twl4030_get_madc_conversion); /** * twl4030_madc_set_current_generator() - setup bias current diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c index 56cf5907a5f0..4a60497a1f19 100644 --- a/drivers/iio/adc/xilinx-xadc-core.c +++ b/drivers/iio/adc/xilinx-xadc-core.c @@ -1204,7 +1204,10 @@ static int xadc_probe(struct platform_device *pdev) ret = PTR_ERR(xadc->clk); goto err_free_samplerate_trigger; } - clk_prepare_enable(xadc->clk); + + ret = clk_prepare_enable(xadc->clk); + if (ret) + goto err_free_samplerate_trigger; ret = xadc->ops->setup(pdev, indio_dev, irq); if (ret) diff --git a/drivers/iio/common/hid-sensors/Kconfig b/drivers/iio/common/hid-sensors/Kconfig index 39188b72cd3b..80105378b0ba 100644 --- a/drivers/iio/common/hid-sensors/Kconfig +++ b/drivers/iio/common/hid-sensors/Kconfig @@ -16,7 +16,7 @@ config HID_SENSOR_IIO_COMMON config HID_SENSOR_IIO_TRIGGER tristate "Common module (trigger) for all HID Sensor IIO drivers" - depends on HID_SENSOR_HUB && HID_SENSOR_IIO_COMMON + depends on HID_SENSOR_HUB && HID_SENSOR_IIO_COMMON && IIO_BUFFER select IIO_TRIGGER help Say yes here to build trigger support for HID sensors. diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c index 1c0874cdf665..f5d4d786e193 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -69,6 +69,12 @@ static struct { {HID_USAGE_SENSOR_TIME_TIMESTAMP, HID_USAGE_SENSOR_UNITS_MILLISECOND, 1000000, 0}, + {HID_USAGE_SENSOR_DEVICE_ORIENTATION, 0, 1, 0}, + + {HID_USAGE_SENSOR_RELATIVE_ORIENTATION, 0, 1, 0}, + + {HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION, 0, 1, 0}, + {HID_USAGE_SENSOR_TEMPERATURE, 0, 1000, 0}, {HID_USAGE_SENSOR_TEMPERATURE, HID_USAGE_SENSOR_UNITS_DEGREES, 1000, 0}, @@ -230,7 +236,7 @@ int hid_sensor_write_samp_freq_value(struct hid_sensor_common *st, ret = sensor_hub_set_feature(st->hsdev, st->poll.report_id, st->poll.index, sizeof(value), &value); if (ret < 0 || value < 0) - ret = -EINVAL; + return -EINVAL; ret = sensor_hub_get_feature(st->hsdev, st->poll.report_id, @@ -283,7 +289,7 @@ int hid_sensor_write_raw_hyst_value(struct hid_sensor_common *st, st->sensitivity.index, sizeof(value), &value); if (ret < 0 || value < 0) - ret = -EINVAL; + return -EINVAL; ret = sensor_hub_get_feature(st->hsdev, st->sensitivity.report_id, @@ -404,6 +410,48 @@ int hid_sensor_get_reporting_interval(struct hid_sensor_hub_device *hsdev, } +static void hid_sensor_get_report_latency_info(struct hid_sensor_hub_device *hsdev, + u32 usage_id, + struct hid_sensor_common *st) +{ + sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, + usage_id, + HID_USAGE_SENSOR_PROP_REPORT_LATENCY, + &st->report_latency); + + hid_dbg(hsdev->hdev, "Report latency attributes: %x:%x\n", + st->report_latency.index, st->report_latency.report_id); +} + +int hid_sensor_get_report_latency(struct hid_sensor_common *st) +{ + int ret; + int value; + + ret = sensor_hub_get_feature(st->hsdev, st->report_latency.report_id, + st->report_latency.index, sizeof(value), + &value); + if (ret < 0) + return ret; + + return value; +} +EXPORT_SYMBOL(hid_sensor_get_report_latency); + +int hid_sensor_set_report_latency(struct hid_sensor_common *st, int latency_ms) +{ + return sensor_hub_set_feature(st->hsdev, st->report_latency.report_id, + st->report_latency.index, + sizeof(latency_ms), &latency_ms); +} +EXPORT_SYMBOL(hid_sensor_set_report_latency); + +bool hid_sensor_batch_mode_supported(struct hid_sensor_common *st) +{ + return st->report_latency.index > 0 && st->report_latency.report_id > 0; +} +EXPORT_SYMBOL(hid_sensor_batch_mode_supported); + int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, u32 usage_id, struct hid_sensor_common *st) @@ -445,6 +493,8 @@ int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev, } else st->timestamp_ns_scale = 1000000000; + hid_sensor_get_report_latency_info(hsdev, usage_id, st); + hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x %x:%x\n", st->poll.index, st->poll.report_id, st->report_state.index, st->report_state.report_id, diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c index 0b5dea050239..16ade0a0327b 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -26,9 +26,84 @@ #include <linux/hid-sensor-hub.h> #include <linux/iio/iio.h> #include <linux/iio/trigger.h> +#include <linux/iio/buffer.h> #include <linux/iio/sysfs.h> #include "hid-sensor-trigger.h" +static ssize_t _hid_sensor_set_report_latency(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int integer, fract, ret; + int latency; + + ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); + if (ret) + return ret; + + latency = integer * 1000 + fract / 1000; + ret = hid_sensor_set_report_latency(attrb, latency); + if (ret < 0) + return len; + + attrb->latency_ms = hid_sensor_get_report_latency(attrb); + + return len; +} + +static ssize_t _hid_sensor_get_report_latency(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int latency; + + latency = hid_sensor_get_report_latency(attrb); + if (latency < 0) + return latency; + + return sprintf(buf, "%d.%06u\n", latency / 1000, (latency % 1000) * 1000); +} + +static ssize_t _hid_sensor_get_fifo_state(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev); + int latency; + + latency = hid_sensor_get_report_latency(attrb); + if (latency < 0) + return latency; + + return sprintf(buf, "%d\n", !!latency); +} + +static IIO_DEVICE_ATTR(hwfifo_timeout, 0644, + _hid_sensor_get_report_latency, + _hid_sensor_set_report_latency, 0); +static IIO_DEVICE_ATTR(hwfifo_enabled, 0444, + _hid_sensor_get_fifo_state, NULL, 0); + +static const struct attribute *hid_sensor_fifo_attributes[] = { + &iio_dev_attr_hwfifo_timeout.dev_attr.attr, + &iio_dev_attr_hwfifo_enabled.dev_attr.attr, + NULL, +}; + +static void hid_sensor_setup_batch_mode(struct iio_dev *indio_dev, + struct hid_sensor_common *st) +{ + if (!hid_sensor_batch_mode_supported(st)) + return; + + iio_buffer_set_attrs(indio_dev->buffer, hid_sensor_fifo_attributes); +} + static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state) { int state_val; @@ -141,6 +216,9 @@ static void hid_sensor_set_power_work(struct work_struct *work) sizeof(attrb->raw_hystersis), &attrb->raw_hystersis); + if (attrb->latency_ms > 0) + hid_sensor_set_report_latency(attrb, attrb->latency_ms); + _hid_sensor_power_state(attrb, true); } @@ -192,6 +270,8 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name, attrb->trigger = trig; indio_dev->trig = iio_trigger_get(trig); + hid_sensor_setup_batch_mode(indio_dev, attrb); + ret = pm_runtime_set_active(&indio_dev->dev); if (ret) goto error_unreg_trigger; diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index df5abc46cd3f..25bed2d7d2b9 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -13,7 +13,8 @@ config AD5064 AD5045, AD5064, AD5064-1, AD5065, AD5625, AD5625R, AD5627, AD5627R, AD5628, AD5629R, AD5645R, AD5647R, AD5648, AD5665, AD5665R, AD5666, AD5667, AD5667R, AD5668, AD5669R, LTC2606, LTC2607, LTC2609, LTC2616, - LTC2617, LTC2619, LTC2626, LTC2627, LTC2629 Digital to Analog Converter. + LTC2617, LTC2619, LTC2626, LTC2627, LTC2629, LTC2631, LTC2633, LTC2635 + Digital to Analog Converter. To compile this driver as a module, choose M here: the module will be called ad5064. diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c index 6803e4a137cd..3f9399c27869 100644 --- a/drivers/iio/dac/ad5064.c +++ b/drivers/iio/dac/ad5064.c @@ -2,8 +2,8 @@ * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5625, AD5625R, * AD5627, AD5627R, AD5628, AD5629R, AD5645R, AD5647R, AD5648, AD5665, AD5665R, * AD5666, AD5667, AD5667R, AD5668, AD5669R, LTC2606, LTC2607, LTC2609, LTC2616, - * LTC2617, LTC2619, LTC2626, LTC2627, LTC2629 Digital to analog converters - * driver + * LTC2617, LTC2619, LTC2626, LTC2627, LTC2629, LTC2631, LTC2633, LTC2635 + * Digital to analog converters driver * * Copyright 2011 Analog Devices Inc. * @@ -168,6 +168,24 @@ enum ad5064_type { ID_LTC2626, ID_LTC2627, ID_LTC2629, + ID_LTC2631_L12, + ID_LTC2631_H12, + ID_LTC2631_L10, + ID_LTC2631_H10, + ID_LTC2631_L8, + ID_LTC2631_H8, + ID_LTC2633_L12, + ID_LTC2633_H12, + ID_LTC2633_L10, + ID_LTC2633_H10, + ID_LTC2633_L8, + ID_LTC2633_H8, + ID_LTC2635_L12, + ID_LTC2635_H12, + ID_LTC2635_L10, + ID_LTC2635_H10, + ID_LTC2635_L8, + ID_LTC2635_H8, }; static int ad5064_write(struct ad5064_state *st, unsigned int cmd, @@ -425,6 +443,19 @@ static DECLARE_AD5064_CHANNELS(ad5669_channels, 16, 0, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ltc2607_channels, 16, 0, ltc2617_ext_info); static DECLARE_AD5064_CHANNELS(ltc2617_channels, 14, 2, ltc2617_ext_info); static DECLARE_AD5064_CHANNELS(ltc2627_channels, 12, 4, ltc2617_ext_info); +#define ltc2631_12_channels ltc2627_channels +static DECLARE_AD5064_CHANNELS(ltc2631_10_channels, 10, 6, ltc2617_ext_info); +static DECLARE_AD5064_CHANNELS(ltc2631_8_channels, 8, 8, ltc2617_ext_info); + +#define LTC2631_INFO(vref, pchannels, nchannels) \ + { \ + .shared_vref = true, \ + .internal_vref = vref, \ + .channels = pchannels, \ + .num_channels = nchannels, \ + .regmap_type = AD5064_REGMAP_LTC, \ + } + static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { [ID_AD5024] = { @@ -724,6 +755,24 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = { .num_channels = 4, .regmap_type = AD5064_REGMAP_LTC, }, + [ID_LTC2631_L12] = LTC2631_INFO(2500000, ltc2631_12_channels, 1), + [ID_LTC2631_H12] = LTC2631_INFO(4096000, ltc2631_12_channels, 1), + [ID_LTC2631_L10] = LTC2631_INFO(2500000, ltc2631_10_channels, 1), + [ID_LTC2631_H10] = LTC2631_INFO(4096000, ltc2631_10_channels, 1), + [ID_LTC2631_L8] = LTC2631_INFO(2500000, ltc2631_8_channels, 1), + [ID_LTC2631_H8] = LTC2631_INFO(4096000, ltc2631_8_channels, 1), + [ID_LTC2633_L12] = LTC2631_INFO(2500000, ltc2631_12_channels, 2), + [ID_LTC2633_H12] = LTC2631_INFO(4096000, ltc2631_12_channels, 2), + [ID_LTC2633_L10] = LTC2631_INFO(2500000, ltc2631_10_channels, 2), + [ID_LTC2633_H10] = LTC2631_INFO(4096000, ltc2631_10_channels, 2), + [ID_LTC2633_L8] = LTC2631_INFO(2500000, ltc2631_8_channels, 2), + [ID_LTC2633_H8] = LTC2631_INFO(4096000, ltc2631_8_channels, 2), + [ID_LTC2635_L12] = LTC2631_INFO(2500000, ltc2631_12_channels, 4), + [ID_LTC2635_H12] = LTC2631_INFO(4096000, ltc2631_12_channels, 4), + [ID_LTC2635_L10] = LTC2631_INFO(2500000, ltc2631_10_channels, 4), + [ID_LTC2635_H10] = LTC2631_INFO(4096000, ltc2631_10_channels, 4), + [ID_LTC2635_L8] = LTC2631_INFO(2500000, ltc2631_8_channels, 4), + [ID_LTC2635_H8] = LTC2631_INFO(4096000, ltc2631_8_channels, 4), }; static inline unsigned int ad5064_num_vref(struct ad5064_state *st) @@ -982,6 +1031,24 @@ static const struct i2c_device_id ad5064_i2c_ids[] = { {"ltc2626", ID_LTC2626}, {"ltc2627", ID_LTC2627}, {"ltc2629", ID_LTC2629}, + {"ltc2631-l12", ID_LTC2631_L12}, + {"ltc2631-h12", ID_LTC2631_H12}, + {"ltc2631-l10", ID_LTC2631_L10}, + {"ltc2631-h10", ID_LTC2631_H10}, + {"ltc2631-l8", ID_LTC2631_L8}, + {"ltc2631-h8", ID_LTC2631_H8}, + {"ltc2633-l12", ID_LTC2633_L12}, + {"ltc2633-h12", ID_LTC2633_H12}, + {"ltc2633-l10", ID_LTC2633_L10}, + {"ltc2633-h10", ID_LTC2633_H10}, + {"ltc2633-l8", ID_LTC2633_L8}, + {"ltc2633-h8", ID_LTC2633_H8}, + {"ltc2635-l12", ID_LTC2635_L12}, + {"ltc2635-h12", ID_LTC2635_H12}, + {"ltc2635-l10", ID_LTC2635_L10}, + {"ltc2635-h10", ID_LTC2635_H10}, + {"ltc2635-l8", ID_LTC2635_L8}, + {"ltc2635-h8", ID_LTC2635_H8}, {} }; MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids); diff --git a/drivers/iio/humidity/hts221.h b/drivers/iio/humidity/hts221.h index c7154665512e..94510266e0a5 100644 --- a/drivers/iio/humidity/hts221.h +++ b/drivers/iio/humidity/hts221.h @@ -57,12 +57,15 @@ struct hts221_hw { struct hts221_sensor sensors[HTS221_SENSOR_MAX]; + bool enabled; u8 odr; const struct hts221_transfer_function *tf; struct hts221_transfer_buffer tb; }; +extern const struct dev_pm_ops hts221_pm_ops; + int hts221_config_drdy(struct hts221_hw *hw, bool enable); int hts221_probe(struct iio_dev *iio_dev); int hts221_power_on(struct hts221_hw *hw); diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c index 3f3ef4a1a474..a56da3999e00 100644 --- a/drivers/iio/humidity/hts221_core.c +++ b/drivers/iio/humidity/hts221_core.c @@ -13,6 +13,7 @@ #include <linux/device.h> #include <linux/iio/sysfs.h> #include <linux/delay.h> +#include <linux/pm.h> #include <asm/unaligned.h> #include "hts221.h" @@ -307,15 +308,30 @@ hts221_sysfs_temp_oversampling_avail(struct device *dev, int hts221_power_on(struct hts221_hw *hw) { - return hts221_update_odr(hw, hw->odr); + int err; + + err = hts221_update_odr(hw, hw->odr); + if (err < 0) + return err; + + hw->enabled = true; + + return 0; } int hts221_power_off(struct hts221_hw *hw) { - u8 data[] = {0x00, 0x00}; + __le16 data = 0; + int err; - return hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data), - data); + err = hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data), + (u8 *)&data); + if (err < 0) + return err; + + hw->enabled = false; + + return 0; } static int hts221_parse_temp_caldata(struct hts221_hw *hw) @@ -682,6 +698,36 @@ int hts221_probe(struct iio_dev *iio_dev) } EXPORT_SYMBOL(hts221_probe); +static int __maybe_unused hts221_suspend(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hts221_hw *hw = iio_priv(iio_dev); + __le16 data = 0; + int err; + + err = hw->tf->write(hw->dev, HTS221_REG_CNTRL1_ADDR, sizeof(data), + (u8 *)&data); + + return err < 0 ? err : 0; +} + +static int __maybe_unused hts221_resume(struct device *dev) +{ + struct iio_dev *iio_dev = dev_get_drvdata(dev); + struct hts221_hw *hw = iio_priv(iio_dev); + int err = 0; + + if (hw->enabled) + err = hts221_update_odr(hw, hw->odr); + + return err; +} + +const struct dev_pm_ops hts221_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(hts221_suspend, hts221_resume) +}; +EXPORT_SYMBOL(hts221_pm_ops); + MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>"); MODULE_DESCRIPTION("STMicroelectronics hts221 sensor driver"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/humidity/hts221_i2c.c b/drivers/iio/humidity/hts221_i2c.c index 8333c0296c0e..f38e4b7e0160 100644 --- a/drivers/iio/humidity/hts221_i2c.c +++ b/drivers/iio/humidity/hts221_i2c.c @@ -105,6 +105,7 @@ MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table); static struct i2c_driver hts221_driver = { .driver = { .name = "hts221_i2c", + .pm = &hts221_pm_ops, .of_match_table = of_match_ptr(hts221_i2c_of_match), .acpi_match_table = ACPI_PTR(hts221_acpi_match), }, diff --git a/drivers/iio/humidity/hts221_spi.c b/drivers/iio/humidity/hts221_spi.c index 70df5e7150c1..57cbc256771b 100644 --- a/drivers/iio/humidity/hts221_spi.c +++ b/drivers/iio/humidity/hts221_spi.c @@ -113,6 +113,7 @@ MODULE_DEVICE_TABLE(spi, hts221_spi_id_table); static struct spi_driver hts221_driver = { .driver = { .name = "hts221_spi", + .pm = &hts221_pm_ops, .of_match_table = of_match_ptr(hts221_spi_of_match), }, .probe = hts221_spi_probe, diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c index 88a7c5d4e4d2..44830bce13df 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c @@ -188,7 +188,6 @@ int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on) int result = 0; if (power_on) { - /* Already under indio-dev->mlock mutex */ if (!st->powerup_count) result = regmap_write(st->map, st->reg->pwr_mgmt_1, 0); if (!result) @@ -329,50 +328,37 @@ inv_mpu6050_read_raw(struct iio_dev *indio_dev, int result; ret = IIO_VAL_INT; - result = 0; - mutex_lock(&indio_dev->mlock); - if (!st->chip_config.enable) { - result = inv_mpu6050_set_power_itg(st, true); - if (result) - goto error_read_raw; - } - /* when enable is on, power is already on */ + mutex_lock(&st->lock); + result = iio_device_claim_direct_mode(indio_dev); + if (result) + goto error_read_raw_unlock; + result = inv_mpu6050_set_power_itg(st, true); + if (result) + goto error_read_raw_release; switch (chan->type) { case IIO_ANGL_VEL: - if (!st->chip_config.gyro_fifo_enable || - !st->chip_config.enable) { - result = inv_mpu6050_switch_engine(st, true, - INV_MPU6050_BIT_PWR_GYRO_STBY); - if (result) - goto error_read_raw; - } + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + goto error_read_raw_power_off; ret = inv_mpu6050_sensor_show(st, st->reg->raw_gyro, chan->channel2, val); - if (!st->chip_config.gyro_fifo_enable || - !st->chip_config.enable) { - result = inv_mpu6050_switch_engine(st, false, - INV_MPU6050_BIT_PWR_GYRO_STBY); - if (result) - goto error_read_raw; - } + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_GYRO_STBY); + if (result) + goto error_read_raw_power_off; break; case IIO_ACCEL: - if (!st->chip_config.accl_fifo_enable || - !st->chip_config.enable) { - result = inv_mpu6050_switch_engine(st, true, - INV_MPU6050_BIT_PWR_ACCL_STBY); - if (result) - goto error_read_raw; - } + result = inv_mpu6050_switch_engine(st, true, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + goto error_read_raw_power_off; ret = inv_mpu6050_sensor_show(st, st->reg->raw_accl, chan->channel2, val); - if (!st->chip_config.accl_fifo_enable || - !st->chip_config.enable) { - result = inv_mpu6050_switch_engine(st, false, - INV_MPU6050_BIT_PWR_ACCL_STBY); - if (result) - goto error_read_raw; - } + result = inv_mpu6050_switch_engine(st, false, + INV_MPU6050_BIT_PWR_ACCL_STBY); + if (result) + goto error_read_raw_power_off; break; case IIO_TEMP: /* wait for stablization */ @@ -384,10 +370,12 @@ inv_mpu6050_read_raw(struct iio_dev *indio_dev, ret = -EINVAL; break; } -error_read_raw: - if (!st->chip_config.enable) - result |= inv_mpu6050_set_power_itg(st, false); - mutex_unlock(&indio_dev->mlock); +error_read_raw_power_off: + result |= inv_mpu6050_set_power_itg(st, false); +error_read_raw_release: + iio_device_release_direct_mode(indio_dev); +error_read_raw_unlock: + mutex_unlock(&st->lock); if (result) return result; @@ -396,13 +384,17 @@ error_read_raw: case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_ANGL_VEL: + mutex_lock(&st->lock); *val = 0; *val2 = gyro_scale_6050[st->chip_config.fsr]; + mutex_unlock(&st->lock); return IIO_VAL_INT_PLUS_NANO; case IIO_ACCEL: + mutex_lock(&st->lock); *val = 0; *val2 = accel_scale[st->chip_config.accl_fs]; + mutex_unlock(&st->lock); return IIO_VAL_INT_PLUS_MICRO; case IIO_TEMP: @@ -425,12 +417,16 @@ error_read_raw: case IIO_CHAN_INFO_CALIBBIAS: switch (chan->type) { case IIO_ANGL_VEL: + mutex_lock(&st->lock); ret = inv_mpu6050_sensor_show(st, st->reg->gyro_offset, chan->channel2, val); + mutex_unlock(&st->lock); return IIO_VAL_INT; case IIO_ACCEL: + mutex_lock(&st->lock); ret = inv_mpu6050_sensor_show(st, st->reg->accl_offset, chan->channel2, val); + mutex_unlock(&st->lock); return IIO_VAL_INT; default: @@ -506,18 +502,17 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev, struct inv_mpu6050_state *st = iio_priv(indio_dev); int result; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); /* * we should only update scale when the chip is disabled, i.e. * not running */ - if (st->chip_config.enable) { - result = -EBUSY; - goto error_write_raw; - } + result = iio_device_claim_direct_mode(indio_dev); + if (result) + goto error_write_raw_unlock; result = inv_mpu6050_set_power_itg(st, true); if (result) - goto error_write_raw; + goto error_write_raw_release; switch (mask) { case IIO_CHAN_INFO_SCALE: @@ -553,9 +548,11 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev, break; } -error_write_raw: result |= inv_mpu6050_set_power_itg(st, false); - mutex_unlock(&indio_dev->mlock); +error_write_raw_release: + iio_device_release_direct_mode(indio_dev); +error_write_raw_unlock: + mutex_unlock(&st->lock); return result; } @@ -611,31 +608,35 @@ inv_mpu6050_fifo_rate_store(struct device *dev, struct device_attribute *attr, if (fifo_rate < INV_MPU6050_MIN_FIFO_RATE || fifo_rate > INV_MPU6050_MAX_FIFO_RATE) return -EINVAL; - if (fifo_rate == st->chip_config.fifo_rate) - return count; - mutex_lock(&indio_dev->mlock); - if (st->chip_config.enable) { - result = -EBUSY; - goto fifo_rate_fail; + mutex_lock(&st->lock); + if (fifo_rate == st->chip_config.fifo_rate) { + result = 0; + goto fifo_rate_fail_unlock; } + result = iio_device_claim_direct_mode(indio_dev); + if (result) + goto fifo_rate_fail_unlock; result = inv_mpu6050_set_power_itg(st, true); if (result) - goto fifo_rate_fail; + goto fifo_rate_fail_release; d = INV_MPU6050_ONE_K_HZ / fifo_rate - 1; result = regmap_write(st->map, st->reg->sample_rate_div, d); if (result) - goto fifo_rate_fail; + goto fifo_rate_fail_power_off; st->chip_config.fifo_rate = fifo_rate; result = inv_mpu6050_set_lpf(st, fifo_rate); if (result) - goto fifo_rate_fail; + goto fifo_rate_fail_power_off; -fifo_rate_fail: +fifo_rate_fail_power_off: result |= inv_mpu6050_set_power_itg(st, false); - mutex_unlock(&indio_dev->mlock); +fifo_rate_fail_release: + iio_device_release_direct_mode(indio_dev); +fifo_rate_fail_unlock: + mutex_unlock(&st->lock); if (result) return result; @@ -650,8 +651,13 @@ inv_fifo_rate_show(struct device *dev, struct device_attribute *attr, char *buf) { struct inv_mpu6050_state *st = iio_priv(dev_to_iio_dev(dev)); + unsigned fifo_rate; + + mutex_lock(&st->lock); + fifo_rate = st->chip_config.fifo_rate; + mutex_unlock(&st->lock); - return sprintf(buf, "%d\n", st->chip_config.fifo_rate); + return scnprintf(buf, PAGE_SIZE, "%u\n", fifo_rate); } /** @@ -678,7 +684,8 @@ static ssize_t inv_attr_show(struct device *dev, struct device_attribute *attr, case ATTR_ACCL_MATRIX: m = st->plat_data.orientation; - return sprintf(buf, "%d, %d, %d; %d, %d, %d; %d, %d, %d\n", + return scnprintf(buf, PAGE_SIZE, + "%d, %d, %d; %d, %d, %d; %d, %d, %d\n", m[0], m[1], m[2], m[3], m[4], m[5], m[6], m[7], m[8]); default: return -EINVAL; @@ -803,27 +810,42 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st) { int result; unsigned int regval; + int i; st->hw = &hw_info[st->chip_type]; st->reg = hw_info[st->chip_type].reg; - /* reset to make sure previous state are not there */ - result = regmap_write(st->map, st->reg->pwr_mgmt_1, - INV_MPU6050_BIT_H_RESET); - if (result) - return result; - msleep(INV_MPU6050_POWER_UP_TIME); - /* check chip self-identification */ result = regmap_read(st->map, INV_MPU6050_REG_WHOAMI, ®val); if (result) return result; if (regval != st->hw->whoami) { - dev_warn(regmap_get_device(st->map), - "whoami mismatch got %#02x expected %#02hhx for %s\n", + /* check whoami against all possible values */ + for (i = 0; i < INV_NUM_PARTS; ++i) { + if (regval == hw_info[i].whoami) { + dev_warn(regmap_get_device(st->map), + "whoami mismatch got %#02x (%s)" + "expected %#02hhx (%s)\n", + regval, hw_info[i].name, + st->hw->whoami, st->hw->name); + break; + } + } + if (i >= INV_NUM_PARTS) { + dev_err(regmap_get_device(st->map), + "invalid whoami %#02x expected %#02hhx (%s)\n", regval, st->hw->whoami, st->hw->name); + return -ENODEV; + } } + /* reset to make sure previous state are not there */ + result = regmap_write(st->map, st->reg->pwr_mgmt_1, + INV_MPU6050_BIT_H_RESET); + if (result) + return result; + msleep(INV_MPU6050_POWER_UP_TIME); + /* * toggle power state. After reset, the sleep bit could be on * or off depending on the OTP settings. Toggling power would @@ -869,6 +891,7 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name, return -ENODEV; } st = iio_priv(indio_dev); + mutex_init(&st->lock); st->chip_type = chip_type; st->powerup_count = 0; st->irq = irq; @@ -962,12 +985,26 @@ EXPORT_SYMBOL_GPL(inv_mpu_core_remove); static int inv_mpu_resume(struct device *dev) { - return inv_mpu6050_set_power_itg(iio_priv(dev_get_drvdata(dev)), true); + struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); + int result; + + mutex_lock(&st->lock); + result = inv_mpu6050_set_power_itg(st, true); + mutex_unlock(&st->lock); + + return result; } static int inv_mpu_suspend(struct device *dev) { - return inv_mpu6050_set_power_itg(iio_priv(dev_get_drvdata(dev)), false); + struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); + int result; + + mutex_lock(&st->lock); + result = inv_mpu6050_set_power_itg(st, false); + mutex_unlock(&st->lock); + + return result; } #endif /* CONFIG_PM_SLEEP */ diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c index 64b5f5b92200..fcd7a92b6cf8 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c @@ -32,7 +32,7 @@ static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id) int ret = 0; /* Use the same mutex which was used everywhere to protect power-op */ - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); if (!st->powerup_count) { ret = regmap_write(st->map, st->reg->pwr_mgmt_1, 0); if (ret) @@ -48,7 +48,7 @@ static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id) INV_MPU6050_BIT_BYPASS_EN); } write_error: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return ret; } @@ -58,14 +58,14 @@ static int inv_mpu6050_deselect_bypass(struct i2c_mux_core *muxc, u32 chan_id) struct iio_dev *indio_dev = i2c_mux_priv(muxc); struct inv_mpu6050_state *st = iio_priv(indio_dev); - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); /* It doesn't really mattter, if any of the calls fails */ regmap_write(st->map, st->reg->int_pin_cfg, INV_MPU6050_INT_PIN_CFG); st->powerup_count--; if (!st->powerup_count) regmap_write(st->map, st->reg->pwr_mgmt_1, INV_MPU6050_BIT_SLEEP); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); return 0; } diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h index 953a0c09d568..065794162d65 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h @@ -14,6 +14,7 @@ #include <linux/i2c-mux.h> #include <linux/kfifo.h> #include <linux/spinlock.h> +#include <linux/mutex.h> #include <linux/iio/iio.h> #include <linux/iio/buffer.h> #include <linux/regmap.h> @@ -82,7 +83,6 @@ enum inv_devices { * @fsr: Full scale range. * @lpf: Digital low pass filter frequency. * @accl_fs: accel full scale range. - * @enable: master enable state. * @accl_fifo_enable: enable accel data output * @gyro_fifo_enable: enable gyro data output * @fifo_rate: FIFO update rate. @@ -91,7 +91,6 @@ struct inv_mpu6050_chip_config { unsigned int fsr:2; unsigned int lpf:3; unsigned int accl_fs:2; - unsigned int enable:1; unsigned int accl_fifo_enable:1; unsigned int gyro_fifo_enable:1; u16 fifo_rate; @@ -114,6 +113,7 @@ struct inv_mpu6050_hw { /* * struct inv_mpu6050_state - Driver state variables. * @TIMESTAMP_FIFO_SIZE: fifo size for timestamp. + * @lock: Chip access lock. * @trig: IIO trigger. * @chip_config: Cached attribute information. * @reg: Map of important registers. @@ -128,6 +128,7 @@ struct inv_mpu6050_hw { */ struct inv_mpu6050_state { #define TIMESTAMP_FIFO_SIZE 16 + struct mutex lock; struct iio_trigger *trig; struct inv_mpu6050_chip_config chip_config; const struct inv_mpu6050_reg_map *reg; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 3a9f3eac91ab..ff81c6aa009d 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -128,7 +128,7 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) u16 fifo_count; s64 timestamp; - mutex_lock(&indio_dev->mlock); + mutex_lock(&st->lock); if (!(st->chip_config.accl_fifo_enable | st->chip_config.gyro_fifo_enable)) goto end_session; @@ -178,7 +178,7 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) } end_session: - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; @@ -186,7 +186,7 @@ end_session: flush_fifo: /* Flush HW and SW FIFOs. */ inv_reset_fifo(indio_dev); - mutex_unlock(&indio_dev->mlock); + mutex_unlock(&st->lock); iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED; diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c index e8818d4dd4b8..540070f0a230 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c @@ -90,7 +90,6 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) if (result) return result; } - st->chip_config.enable = enable; return 0; } @@ -103,7 +102,15 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable) static int inv_mpu_data_rdy_trigger_set_state(struct iio_trigger *trig, bool state) { - return inv_mpu6050_set_enable(iio_trigger_get_drvdata(trig), state); + struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); + struct inv_mpu6050_state *st = iio_priv(indio_dev); + int result; + + mutex_lock(&st->lock); + result = inv_mpu6050_set_enable(indio_dev, state); + mutex_unlock(&st->lock); + + return result; } static const struct iio_trigger_ops inv_mpu_trigger_ops = { diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h index 4839db7b9690..46352c7bff43 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx.h @@ -135,6 +135,8 @@ struct st_lsm6dsx_hw { #endif /* CONFIG_SPI_MASTER */ }; +extern const struct dev_pm_ops st_lsm6dsx_pm_ops; + int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, const char *name, const struct st_lsm6dsx_transfer_function *tf_ops); int st_lsm6dsx_sensor_enable(struct st_lsm6dsx_sensor *sensor); @@ -144,5 +146,8 @@ int st_lsm6dsx_write_with_mask(struct st_lsm6dsx_hw *hw, u8 addr, u8 mask, u8 val); int st_lsm6dsx_update_watermark(struct st_lsm6dsx_sensor *sensor, u16 watermark); +int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw); +int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, + enum st_lsm6dsx_fifo_mode fifo_mode); #endif /* ST_LSM6DSX_H */ diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index c8e5cfd0ef0b..2a72acc6e049 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -37,6 +37,8 @@ #define ST_LSM6DSX_REG_FIFO_THH_ADDR 0x07 #define ST_LSM6DSX_FIFO_TH_MASK GENMASK(11, 0) #define ST_LSM6DSX_REG_FIFO_DEC_GXL_ADDR 0x08 +#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12 +#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5) #define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a #define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0) #define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3) @@ -130,8 +132,8 @@ static int st_lsm6dsx_update_decimators(struct st_lsm6dsx_hw *hw) return 0; } -static int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, - enum st_lsm6dsx_fifo_mode fifo_mode) +int st_lsm6dsx_set_fifo_mode(struct st_lsm6dsx_hw *hw, + enum st_lsm6dsx_fifo_mode fifo_mode) { u8 data; int err; @@ -303,7 +305,7 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw) return read_len; } -static int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw) +int st_lsm6dsx_flush_fifo(struct st_lsm6dsx_hw *hw) { int err; @@ -417,6 +419,7 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) { struct iio_buffer *buffer; unsigned long irq_type; + bool irq_active_low; int i, err; irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq)); @@ -424,12 +427,23 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) switch (irq_type) { case IRQF_TRIGGER_HIGH: case IRQF_TRIGGER_RISING: + irq_active_low = false; + break; + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_FALLING: + irq_active_low = true; break; default: dev_info(hw->dev, "mode %lx unsupported\n", irq_type); return -EINVAL; } + err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_HLACTIVE_ADDR, + ST_LSM6DSX_REG_HLACTIVE_MASK, + irq_active_low); + if (err < 0) + return err; + err = devm_request_threaded_irq(hw->dev, hw->irq, st_lsm6dsx_handler_irq, st_lsm6dsx_handler_thread, diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c index 462a27b70453..b485540da89e 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c @@ -36,6 +36,7 @@ #include <linux/delay.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/pm.h> #include <linux/platform_data/st_sensors_pdata.h> @@ -731,6 +732,57 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id, const char *name, } EXPORT_SYMBOL(st_lsm6dsx_probe); +static int __maybe_unused st_lsm6dsx_suspend(struct device *dev) +{ + struct st_lsm6dsx_hw *hw = dev_get_drvdata(dev); + struct st_lsm6dsx_sensor *sensor; + int i, err = 0; + + for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) { + sensor = iio_priv(hw->iio_devs[i]); + if (!(hw->enable_mask & BIT(sensor->id))) + continue; + + err = st_lsm6dsx_write_with_mask(hw, + st_lsm6dsx_odr_table[sensor->id].reg.addr, + st_lsm6dsx_odr_table[sensor->id].reg.mask, 0); + if (err < 0) + return err; + } + + if (hw->fifo_mode != ST_LSM6DSX_FIFO_BYPASS) + err = st_lsm6dsx_flush_fifo(hw); + + return err; +} + +static int __maybe_unused st_lsm6dsx_resume(struct device *dev) +{ + struct st_lsm6dsx_hw *hw = dev_get_drvdata(dev); + struct st_lsm6dsx_sensor *sensor; + int i, err = 0; + + for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) { + sensor = iio_priv(hw->iio_devs[i]); + if (!(hw->enable_mask & BIT(sensor->id))) + continue; + + err = st_lsm6dsx_set_odr(sensor, sensor->odr); + if (err < 0) + return err; + } + + if (hw->enable_mask) + err = st_lsm6dsx_set_fifo_mode(hw, ST_LSM6DSX_FIFO_CONT); + + return err; +} + +const struct dev_pm_ops st_lsm6dsx_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(st_lsm6dsx_suspend, st_lsm6dsx_resume) +}; +EXPORT_SYMBOL(st_lsm6dsx_pm_ops); + MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>"); MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx driver"); diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c index 09a51cfb9b5e..305fec712ab0 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i2c.c @@ -98,6 +98,7 @@ MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table); static struct i2c_driver st_lsm6dsx_driver = { .driver = { .name = "st_lsm6dsx_i2c", + .pm = &st_lsm6dsx_pm_ops, .of_match_table = of_match_ptr(st_lsm6dsx_i2c_of_match), }, .probe = st_lsm6dsx_i2c_probe, diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c index f765a5058488..95472f153ad2 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_spi.c @@ -115,6 +115,7 @@ MODULE_DEVICE_TABLE(spi, st_lsm6dsx_spi_id_table); static struct spi_driver st_lsm6dsx_driver = { .driver = { .name = "st_lsm6dsx_spi", + .pm = &st_lsm6dsx_pm_ops, .of_match_table = of_match_ptr(st_lsm6dsx_spi_of_match), }, .probe = st_lsm6dsx_spi_probe, diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 57c14da5708f..17ec4cee51dc 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -478,21 +478,16 @@ ssize_t iio_enum_write(struct iio_dev *indio_dev, size_t len) { const struct iio_enum *e = (const struct iio_enum *)priv; - unsigned int i; int ret; if (!e->set) return -EINVAL; - for (i = 0; i < e->num_items; i++) { - if (sysfs_streq(buf, e->items[i])) - break; - } - - if (i == e->num_items) - return -EINVAL; + ret = __sysfs_match_string(e->items, e->num_items, buf); + if (ret < 0) + return ret; - ret = e->set(indio_dev, chan, i); + ret = e->set(indio_dev, chan, ret); return ret ? ret : len; } EXPORT_SYMBOL_GPL(iio_enum_write); @@ -1089,7 +1084,7 @@ static int iio_device_add_info_mask_type(struct iio_dev *indio_dev, { int i, ret, attrcount = 0; - for_each_set_bit(i, infomask, sizeof(infomask)*8) { + for_each_set_bit(i, infomask, sizeof(*infomask)*8) { if (i >= ARRAY_SIZE(iio_chan_info_postfix)) return -EINVAL; ret = __iio_add_chan_devattr(iio_chan_info_postfix[i], @@ -1118,7 +1113,7 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev, int i, ret, attrcount = 0; char *avail_postfix; - for_each_set_bit(i, infomask, sizeof(infomask) * 8) { + for_each_set_bit(i, infomask, sizeof(*infomask) * 8) { avail_postfix = kasprintf(GFP_KERNEL, "%s_available", iio_chan_info_postfix[i]); @@ -1428,7 +1423,7 @@ static void iio_device_unregister_sysfs(struct iio_dev *indio_dev) static void iio_dev_release(struct device *device) { struct iio_dev *indio_dev = dev_to_iio_dev(device); - if (indio_dev->modes & (INDIO_BUFFER_TRIGGERED | INDIO_EVENT_TRIGGERED)) + if (indio_dev->modes & INDIO_ALL_TRIGGERED_MODES) iio_device_unregister_trigger_consumer(indio_dev); iio_device_unregister_eventset(indio_dev); iio_device_unregister_sysfs(indio_dev); @@ -1710,7 +1705,7 @@ int iio_device_register(struct iio_dev *indio_dev) "Failed to register event set\n"); goto error_free_sysfs; } - if (indio_dev->modes & (INDIO_BUFFER_TRIGGERED | INDIO_EVENT_TRIGGERED)) + if (indio_dev->modes & INDIO_ALL_TRIGGERED_MODES) iio_device_register_trigger_consumer(indio_dev); if ((indio_dev->modes & INDIO_ALL_BUFFER_MODES) && diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c index 7a13535dc3e9..da3d06b073bb 100644 --- a/drivers/iio/inkern.c +++ b/drivers/iio/inkern.c @@ -750,11 +750,9 @@ int iio_read_avail_channel_raw(struct iio_channel *chan, err_unlock: mutex_unlock(&chan->indio_dev->info_exist_lock); - if (ret >= 0 && type != IIO_VAL_INT) { + if (ret >= 0 && type != IIO_VAL_INT) /* raw values are assumed to be IIO_VAL_INT */ ret = -EINVAL; - goto err_unlock; - } return ret; } @@ -869,3 +867,63 @@ err_unlock: return ret; } EXPORT_SYMBOL_GPL(iio_write_channel_raw); + +unsigned int iio_get_channel_ext_info_count(struct iio_channel *chan) +{ + const struct iio_chan_spec_ext_info *ext_info; + unsigned int i = 0; + + if (!chan->channel->ext_info) + return i; + + for (ext_info = chan->channel->ext_info; ext_info->name; ext_info++) + ++i; + + return i; +} +EXPORT_SYMBOL_GPL(iio_get_channel_ext_info_count); + +static const struct iio_chan_spec_ext_info *iio_lookup_ext_info( + const struct iio_channel *chan, + const char *attr) +{ + const struct iio_chan_spec_ext_info *ext_info; + + if (!chan->channel->ext_info) + return NULL; + + for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) { + if (!strcmp(attr, ext_info->name)) + return ext_info; + } + + return NULL; +} + +ssize_t iio_read_channel_ext_info(struct iio_channel *chan, + const char *attr, char *buf) +{ + const struct iio_chan_spec_ext_info *ext_info; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->read(chan->indio_dev, ext_info->private, + chan->channel, buf); +} +EXPORT_SYMBOL_GPL(iio_read_channel_ext_info); + +ssize_t iio_write_channel_ext_info(struct iio_channel *chan, const char *attr, + const char *buf, size_t len) +{ + const struct iio_chan_spec_ext_info *ext_info; + + ext_info = iio_lookup_ext_info(chan, attr); + if (!ext_info) + return -EINVAL; + + return ext_info->write(chan->indio_dev, ext_info->private, + chan->channel, buf, len); +} +EXPORT_SYMBOL_GPL(iio_write_channel_ext_info); diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 33e755d8d825..2356ed9285df 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -172,6 +172,16 @@ config SENSORS_ISL29018 in lux, proximity infrared sensing and normal infrared sensing. Data from sensor is accessible via sysfs. +config SENSORS_ISL29028 + tristate "Intersil ISL29028 Concurrent Light and Proximity Sensor" + depends on I2C + select REGMAP_I2C + help + Provides driver for the Intersil's ISL29028 device. + This driver supports the sysfs interface to get the ALS, IR intensity, + Proximity value via iio. The ISL29028 provides the concurrent sensing + of ambient light and proximity. + config ISL29125 tristate "Intersil ISL29125 digital color light sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 681363c2b298..fa32fa459e2e 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o +obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o obj-$(CONFIG_ISL29125) += isl29125.o obj-$(CONFIG_JSA1212) += jsa1212.o obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c index 917dd8b43e72..61f5924b472d 100644 --- a/drivers/iio/light/isl29018.c +++ b/drivers/iio/light/isl29018.c @@ -807,6 +807,7 @@ static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume); #define ISL29018_PM_OPS NULL #endif +#ifdef CONFIG_ACPI static const struct acpi_device_id isl29018_acpi_match[] = { {"ISL29018", isl29018}, {"ISL29023", isl29023}, @@ -814,6 +815,7 @@ static const struct acpi_device_id isl29018_acpi_match[] = { {}, }; MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match); +#endif static const struct i2c_device_id isl29018_id[] = { {"isl29018", isl29018}, diff --git a/drivers/iio/light/isl29028.c b/drivers/iio/light/isl29028.c new file mode 100644 index 000000000000..3d09c1fc4dad --- /dev/null +++ b/drivers/iio/light/isl29028.c @@ -0,0 +1,729 @@ +/* + * IIO driver for the light sensor ISL29028. + * ISL29028 is Concurrent Ambient Light and Proximity Sensor + * + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * Datasheets: + * - http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29028.pdf + * - http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29030.pdf + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/regmap.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/pm_runtime.h> + +#define ISL29028_CONV_TIME_MS 100 + +#define ISL29028_REG_CONFIGURE 0x01 + +#define ISL29028_CONF_ALS_IR_MODE_ALS 0 +#define ISL29028_CONF_ALS_IR_MODE_IR BIT(0) +#define ISL29028_CONF_ALS_IR_MODE_MASK BIT(0) + +#define ISL29028_CONF_ALS_RANGE_LOW_LUX 0 +#define ISL29028_CONF_ALS_RANGE_HIGH_LUX BIT(1) +#define ISL29028_CONF_ALS_RANGE_MASK BIT(1) + +#define ISL29028_CONF_ALS_DIS 0 +#define ISL29028_CONF_ALS_EN BIT(2) +#define ISL29028_CONF_ALS_EN_MASK BIT(2) + +#define ISL29028_CONF_PROX_SLP_SH 4 +#define ISL29028_CONF_PROX_SLP_MASK (7 << ISL29028_CONF_PROX_SLP_SH) + +#define ISL29028_CONF_PROX_EN BIT(7) +#define ISL29028_CONF_PROX_EN_MASK BIT(7) + +#define ISL29028_REG_INTERRUPT 0x02 + +#define ISL29028_REG_PROX_DATA 0x08 +#define ISL29028_REG_ALSIR_L 0x09 +#define ISL29028_REG_ALSIR_U 0x0A + +#define ISL29028_REG_TEST1_MODE 0x0E +#define ISL29028_REG_TEST2_MODE 0x0F + +#define ISL29028_NUM_REGS (ISL29028_REG_TEST2_MODE + 1) + +#define ISL29028_POWER_OFF_DELAY_MS 2000 + +struct isl29028_prox_data { + int sampling_int; + int sampling_fract; + int sleep_time; +}; + +static const struct isl29028_prox_data isl29028_prox_data[] = { + { 1, 250000, 800 }, + { 2, 500000, 400 }, + { 5, 0, 200 }, + { 10, 0, 100 }, + { 13, 300000, 75 }, + { 20, 0, 50 }, + { 80, 0, 13 }, /* + * Note: Data sheet lists 12.5 ms sleep time. + * Round up a half millisecond for msleep(). + */ + { 100, 0, 0 } +}; + +enum isl29028_als_ir_mode { + ISL29028_MODE_NONE = 0, + ISL29028_MODE_ALS, + ISL29028_MODE_IR, +}; + +struct isl29028_chip { + struct mutex lock; + struct regmap *regmap; + int prox_sampling_int; + int prox_sampling_frac; + bool enable_prox; + int lux_scale; + enum isl29028_als_ir_mode als_ir_mode; +}; + +static int isl29028_find_prox_sleep_index(int sampling_int, int sampling_fract) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(isl29028_prox_data); ++i) { + if (isl29028_prox_data[i].sampling_int == sampling_int && + isl29028_prox_data[i].sampling_fract == sampling_fract) + return i; + } + + return -EINVAL; +} + +static int isl29028_set_proxim_sampling(struct isl29028_chip *chip, + int sampling_int, int sampling_fract) +{ + struct device *dev = regmap_get_device(chip->regmap); + int sleep_index, ret; + + sleep_index = isl29028_find_prox_sleep_index(sampling_int, + sampling_fract); + if (sleep_index < 0) + return sleep_index; + + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_PROX_SLP_MASK, + sleep_index << ISL29028_CONF_PROX_SLP_SH); + + if (ret < 0) { + dev_err(dev, "%s(): Error %d setting the proximity sampling\n", + __func__, ret); + return ret; + } + + chip->prox_sampling_int = sampling_int; + chip->prox_sampling_frac = sampling_fract; + + return ret; +} + +static int isl29028_enable_proximity(struct isl29028_chip *chip) +{ + int prox_index, ret; + + ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling_int, + chip->prox_sampling_frac); + if (ret < 0) + return ret; + + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_PROX_EN_MASK, + ISL29028_CONF_PROX_EN); + if (ret < 0) + return ret; + + /* Wait for conversion to be complete for first sample */ + prox_index = isl29028_find_prox_sleep_index(chip->prox_sampling_int, + chip->prox_sampling_frac); + if (prox_index < 0) + return prox_index; + + msleep(isl29028_prox_data[prox_index].sleep_time); + + return 0; +} + +static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale) +{ + struct device *dev = regmap_get_device(chip->regmap); + int val = (lux_scale == 2000) ? ISL29028_CONF_ALS_RANGE_HIGH_LUX : + ISL29028_CONF_ALS_RANGE_LOW_LUX; + int ret; + + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_RANGE_MASK, val); + if (ret < 0) { + dev_err(dev, "%s(): Error %d setting the ALS scale\n", __func__, + ret); + return ret; + } + + chip->lux_scale = lux_scale; + + return ret; +} + +static int isl29028_set_als_ir_mode(struct isl29028_chip *chip, + enum isl29028_als_ir_mode mode) +{ + int ret; + + if (chip->als_ir_mode == mode) + return 0; + + ret = isl29028_set_als_scale(chip, chip->lux_scale); + if (ret < 0) + return ret; + + switch (mode) { + case ISL29028_MODE_ALS: + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_IR_MODE_MASK, + ISL29028_CONF_ALS_IR_MODE_ALS); + if (ret < 0) + return ret; + + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_RANGE_MASK, + ISL29028_CONF_ALS_RANGE_HIGH_LUX); + break; + case ISL29028_MODE_IR: + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_IR_MODE_MASK, + ISL29028_CONF_ALS_IR_MODE_IR); + break; + case ISL29028_MODE_NONE: + return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_EN_MASK, + ISL29028_CONF_ALS_DIS); + } + + if (ret < 0) + return ret; + + /* Enable the ALS/IR */ + ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, + ISL29028_CONF_ALS_EN_MASK, + ISL29028_CONF_ALS_EN); + if (ret < 0) + return ret; + + /* Need to wait for conversion time if ALS/IR mode enabled */ + msleep(ISL29028_CONV_TIME_MS); + + chip->als_ir_mode = mode; + + return 0; +} + +static int isl29028_read_als_ir(struct isl29028_chip *chip, int *als_ir) +{ + struct device *dev = regmap_get_device(chip->regmap); + unsigned int lsb; + unsigned int msb; + int ret; + + ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_L, &lsb); + if (ret < 0) { + dev_err(dev, + "%s(): Error %d reading register ALSIR_L\n", + __func__, ret); + return ret; + } + + ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_U, &msb); + if (ret < 0) { + dev_err(dev, + "%s(): Error %d reading register ALSIR_U\n", + __func__, ret); + return ret; + } + + *als_ir = ((msb & 0xF) << 8) | (lsb & 0xFF); + + return 0; +} + +static int isl29028_read_proxim(struct isl29028_chip *chip, int *prox) +{ + struct device *dev = regmap_get_device(chip->regmap); + unsigned int data; + int ret; + + if (!chip->enable_prox) { + ret = isl29028_enable_proximity(chip); + if (ret < 0) + return ret; + + chip->enable_prox = true; + } + + ret = regmap_read(chip->regmap, ISL29028_REG_PROX_DATA, &data); + if (ret < 0) { + dev_err(dev, "%s(): Error %d reading register PROX_DATA\n", + __func__, ret); + return ret; + } + + *prox = data; + + return 0; +} + +static int isl29028_als_get(struct isl29028_chip *chip, int *als_data) +{ + struct device *dev = regmap_get_device(chip->regmap); + int ret; + int als_ir_data; + + ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_ALS); + if (ret < 0) { + dev_err(dev, "%s(): Error %d enabling ALS mode\n", __func__, + ret); + return ret; + } + + ret = isl29028_read_als_ir(chip, &als_ir_data); + if (ret < 0) + return ret; + + /* + * convert als data count to lux. + * if lux_scale = 125, lux = count * 0.031 + * if lux_scale = 2000, lux = count * 0.49 + */ + if (chip->lux_scale == 125) + als_ir_data = (als_ir_data * 31) / 1000; + else + als_ir_data = (als_ir_data * 49) / 100; + + *als_data = als_ir_data; + + return 0; +} + +static int isl29028_ir_get(struct isl29028_chip *chip, int *ir_data) +{ + struct device *dev = regmap_get_device(chip->regmap); + int ret; + + ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_IR); + if (ret < 0) { + dev_err(dev, "%s(): Error %d enabling IR mode\n", __func__, + ret); + return ret; + } + + return isl29028_read_als_ir(chip, ir_data); +} + +static int isl29028_set_pm_runtime_busy(struct isl29028_chip *chip, bool on) +{ + struct device *dev = regmap_get_device(chip->regmap); + int ret; + + if (on) { + ret = pm_runtime_get_sync(dev); + if (ret < 0) + pm_runtime_put_noidle(dev); + } else { + pm_runtime_mark_last_busy(dev); + ret = pm_runtime_put_autosuspend(dev); + } + + return ret; +} + +/* Channel IO */ +static int isl29028_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct isl29028_chip *chip = iio_priv(indio_dev); + struct device *dev = regmap_get_device(chip->regmap); + int ret; + + ret = isl29028_set_pm_runtime_busy(chip, true); + if (ret < 0) + return ret; + + mutex_lock(&chip->lock); + + ret = -EINVAL; + switch (chan->type) { + case IIO_PROXIMITY: + if (mask != IIO_CHAN_INFO_SAMP_FREQ) { + dev_err(dev, + "%s(): proximity: Mask value 0x%08lx is not supported\n", + __func__, mask); + break; + } + + if (val < 1 || val > 100) { + dev_err(dev, + "%s(): proximity: Sampling frequency %d is not in the range [1:100]\n", + __func__, val); + break; + } + + ret = isl29028_set_proxim_sampling(chip, val, val2); + break; + case IIO_LIGHT: + if (mask != IIO_CHAN_INFO_SCALE) { + dev_err(dev, + "%s(): light: Mask value 0x%08lx is not supported\n", + __func__, mask); + break; + } + + if (val != 125 && val != 2000) { + dev_err(dev, + "%s(): light: Lux scale %d is not in the set {125, 2000}\n", + __func__, val); + break; + } + + ret = isl29028_set_als_scale(chip, val); + break; + default: + dev_err(dev, "%s(): Unsupported channel type %x\n", + __func__, chan->type); + break; + } + + mutex_unlock(&chip->lock); + + if (ret < 0) + return ret; + + ret = isl29028_set_pm_runtime_busy(chip, false); + if (ret < 0) + return ret; + + return ret; +} + +static int isl29028_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct isl29028_chip *chip = iio_priv(indio_dev); + struct device *dev = regmap_get_device(chip->regmap); + int ret, pm_ret; + + ret = isl29028_set_pm_runtime_busy(chip, true); + if (ret < 0) + return ret; + + mutex_lock(&chip->lock); + + ret = -EINVAL; + switch (mask) { + case IIO_CHAN_INFO_RAW: + case IIO_CHAN_INFO_PROCESSED: + switch (chan->type) { + case IIO_LIGHT: + ret = isl29028_als_get(chip, val); + break; + case IIO_INTENSITY: + ret = isl29028_ir_get(chip, val); + break; + case IIO_PROXIMITY: + ret = isl29028_read_proxim(chip, val); + break; + default: + break; + } + + if (ret < 0) + break; + + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SAMP_FREQ: + if (chan->type != IIO_PROXIMITY) + break; + + *val = chip->prox_sampling_int; + *val2 = chip->prox_sampling_frac; + ret = IIO_VAL_INT; + break; + case IIO_CHAN_INFO_SCALE: + if (chan->type != IIO_LIGHT) + break; + *val = chip->lux_scale; + ret = IIO_VAL_INT; + break; + default: + dev_err(dev, "%s(): mask value 0x%08lx is not supported\n", + __func__, mask); + break; + } + + mutex_unlock(&chip->lock); + + if (ret < 0) + return ret; + + /** + * Preserve the ret variable if the call to + * isl29028_set_pm_runtime_busy() is successful so the reading + * (if applicable) is returned to user space. + */ + pm_ret = isl29028_set_pm_runtime_busy(chip, false); + if (pm_ret < 0) + return pm_ret; + + return ret; +} + +static IIO_CONST_ATTR(in_proximity_sampling_frequency_available, + "1.25 2.5 5 10 13.3 20 80 100"); +static IIO_CONST_ATTR(in_illuminance_scale_available, "125 2000"); + +#define ISL29028_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr) +static struct attribute *isl29028_attributes[] = { + ISL29028_CONST_ATTR(in_proximity_sampling_frequency_available), + ISL29028_CONST_ATTR(in_illuminance_scale_available), + NULL, +}; + +static const struct attribute_group isl29108_group = { + .attrs = isl29028_attributes, +}; + +static const struct iio_chan_spec isl29028_channels[] = { + { + .type = IIO_LIGHT, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_SCALE), + }, { + .type = IIO_INTENSITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), + }, { + .type = IIO_PROXIMITY, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SAMP_FREQ), + } +}; + +static const struct iio_info isl29028_info = { + .attrs = &isl29108_group, + .driver_module = THIS_MODULE, + .read_raw = isl29028_read_raw, + .write_raw = isl29028_write_raw, +}; + +static int isl29028_clear_configure_reg(struct isl29028_chip *chip) +{ + struct device *dev = regmap_get_device(chip->regmap); + int ret; + + ret = regmap_write(chip->regmap, ISL29028_REG_CONFIGURE, 0x0); + if (ret < 0) + dev_err(dev, "%s(): Error %d clearing the CONFIGURE register\n", + __func__, ret); + + chip->als_ir_mode = ISL29028_MODE_NONE; + chip->enable_prox = false; + + return ret; +} + +static bool isl29028_is_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case ISL29028_REG_INTERRUPT: + case ISL29028_REG_PROX_DATA: + case ISL29028_REG_ALSIR_L: + case ISL29028_REG_ALSIR_U: + return true; + default: + return false; + } +} + +static const struct regmap_config isl29028_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .volatile_reg = isl29028_is_volatile_reg, + .max_register = ISL29028_NUM_REGS - 1, + .num_reg_defaults_raw = ISL29028_NUM_REGS, + .cache_type = REGCACHE_RBTREE, +}; + +static int isl29028_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct isl29028_chip *chip; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + chip = iio_priv(indio_dev); + + i2c_set_clientdata(client, indio_dev); + mutex_init(&chip->lock); + + chip->regmap = devm_regmap_init_i2c(client, &isl29028_regmap_config); + if (IS_ERR(chip->regmap)) { + ret = PTR_ERR(chip->regmap); + dev_err(&client->dev, "%s: Error %d initializing regmap\n", + __func__, ret); + return ret; + } + + chip->enable_prox = false; + chip->prox_sampling_int = 20; + chip->prox_sampling_frac = 0; + chip->lux_scale = 2000; + + ret = regmap_write(chip->regmap, ISL29028_REG_TEST1_MODE, 0x0); + if (ret < 0) { + dev_err(&client->dev, + "%s(): Error %d writing to TEST1_MODE register\n", + __func__, ret); + return ret; + } + + ret = regmap_write(chip->regmap, ISL29028_REG_TEST2_MODE, 0x0); + if (ret < 0) { + dev_err(&client->dev, + "%s(): Error %d writing to TEST2_MODE register\n", + __func__, ret); + return ret; + } + + ret = isl29028_clear_configure_reg(chip); + if (ret < 0) + return ret; + + indio_dev->info = &isl29028_info; + indio_dev->channels = isl29028_channels; + indio_dev->num_channels = ARRAY_SIZE(isl29028_channels); + indio_dev->name = id->name; + indio_dev->dev.parent = &client->dev; + indio_dev->modes = INDIO_DIRECT_MODE; + + pm_runtime_enable(&client->dev); + pm_runtime_set_autosuspend_delay(&client->dev, + ISL29028_POWER_OFF_DELAY_MS); + pm_runtime_use_autosuspend(&client->dev); + + ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); + if (ret < 0) { + dev_err(&client->dev, + "%s(): iio registration failed with error %d\n", + __func__, ret); + return ret; + } + + return 0; +} + +static int isl29028_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct isl29028_chip *chip = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + return isl29028_clear_configure_reg(chip); +} + +static int __maybe_unused isl29028_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct isl29028_chip *chip = iio_priv(indio_dev); + int ret; + + mutex_lock(&chip->lock); + + ret = isl29028_clear_configure_reg(chip); + + mutex_unlock(&chip->lock); + + return ret; +} + +static int __maybe_unused isl29028_resume(struct device *dev) +{ + /** + * The specific component (ALS/IR or proximity) will enable itself as + * needed the next time that the user requests a reading. This is done + * above in isl29028_set_als_ir_mode() and isl29028_enable_proximity(). + */ + return 0; +} + +static const struct dev_pm_ops isl29028_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(isl29028_suspend, isl29028_resume, NULL) +}; + +static const struct i2c_device_id isl29028_id[] = { + {"isl29028", 0}, + {"isl29030", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, isl29028_id); + +static const struct of_device_id isl29028_of_match[] = { + { .compatible = "isl,isl29028", }, /* for backward compat., don't use */ + { .compatible = "isil,isl29028", }, + { .compatible = "isil,isl29030", }, + { }, +}; +MODULE_DEVICE_TABLE(of, isl29028_of_match); + +static struct i2c_driver isl29028_driver = { + .driver = { + .name = "isl29028", + .pm = &isl29028_pm_ops, + .of_match_table = isl29028_of_match, + }, + .probe = isl29028_probe, + .remove = isl29028_remove, + .id_table = isl29028_id, +}; + +module_i2c_driver(isl29028_driver); + +MODULE_DESCRIPTION("ISL29028 Ambient Light and Proximity Sensor driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); diff --git a/drivers/iio/light/rpr0521.c b/drivers/iio/light/rpr0521.c index 7de0f397194b..9d0c2e859bb2 100644 --- a/drivers/iio/light/rpr0521.c +++ b/drivers/iio/light/rpr0521.c @@ -9,7 +9,7 @@ * * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38). * - * TODO: illuminance channel, PM support, buffer + * TODO: illuminance channel, buffer */ #include <linux/module.h> @@ -30,6 +30,7 @@ #define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */ #define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */ #define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */ +#define RPR0521_REG_PS_OFFSET_LSB 0x53 #define RPR0521_REG_ID 0x92 #define RPR0521_MODE_ALS_MASK BIT(7) @@ -77,9 +78,9 @@ static const struct rpr0521_gain rpr0521_pxs_gain[3] = { }; enum rpr0521_channel { + RPR0521_CHAN_PXS, RPR0521_CHAN_ALS_DATA0, RPR0521_CHAN_ALS_DATA1, - RPR0521_CHAN_PXS, }; struct rpr0521_reg_desc { @@ -88,6 +89,10 @@ struct rpr0521_reg_desc { }; static const struct rpr0521_reg_desc rpr0521_data_reg[] = { + [RPR0521_CHAN_PXS] = { + .address = RPR0521_REG_PXS_DATA, + .device_mask = RPR0521_MODE_PXS_MASK, + }, [RPR0521_CHAN_ALS_DATA0] = { .address = RPR0521_REG_ALS_DATA0, .device_mask = RPR0521_MODE_ALS_MASK, @@ -96,10 +101,6 @@ static const struct rpr0521_reg_desc rpr0521_data_reg[] = { .address = RPR0521_REG_ALS_DATA1, .device_mask = RPR0521_MODE_ALS_MASK, }, - [RPR0521_CHAN_PXS] = { - .address = RPR0521_REG_PXS_DATA, - .device_mask = RPR0521_MODE_PXS_MASK, - }, }; static const struct rpr0521_gain_info { @@ -109,6 +110,13 @@ static const struct rpr0521_gain_info { const struct rpr0521_gain *gain; int size; } rpr0521_gain[] = { + [RPR0521_CHAN_PXS] = { + .reg = RPR0521_REG_PXS_CTRL, + .mask = RPR0521_PXS_GAIN_MASK, + .shift = RPR0521_PXS_GAIN_SHIFT, + .gain = rpr0521_pxs_gain, + .size = ARRAY_SIZE(rpr0521_pxs_gain), + }, [RPR0521_CHAN_ALS_DATA0] = { .reg = RPR0521_REG_ALS_CTRL, .mask = RPR0521_ALS_DATA0_GAIN_MASK, @@ -123,13 +131,30 @@ static const struct rpr0521_gain_info { .gain = rpr0521_als_gain, .size = ARRAY_SIZE(rpr0521_als_gain), }, - [RPR0521_CHAN_PXS] = { - .reg = RPR0521_REG_PXS_CTRL, - .mask = RPR0521_PXS_GAIN_MASK, - .shift = RPR0521_PXS_GAIN_SHIFT, - .gain = rpr0521_pxs_gain, - .size = ARRAY_SIZE(rpr0521_pxs_gain), - }, +}; + +struct rpr0521_samp_freq { + int als_hz; + int als_uhz; + int pxs_hz; + int pxs_uhz; +}; + +static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = { +/* {ALS, PXS}, W==currently writable option */ + {0, 0, 0, 0}, /* W0000, 0=standby */ + {0, 0, 100, 0}, /* 0001 */ + {0, 0, 25, 0}, /* 0010 */ + {0, 0, 10, 0}, /* 0011 */ + {0, 0, 2, 500000}, /* 0100 */ + {10, 0, 20, 0}, /* 0101 */ + {10, 0, 10, 0}, /* W0110 */ + {10, 0, 2, 500000}, /* 0111 */ + {2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */ + {2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */ + {2, 500000, 0, 0}, /* 1010, high sensitivity mode */ + {2, 500000, 2, 500000}, /* W1011, high sensitivity mode */ + {20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */ }; struct rpr0521_data { @@ -142,9 +167,11 @@ struct rpr0521_data { bool als_dev_en; bool pxs_dev_en; - /* optimize runtime pm ops - enable device only if needed */ + /* optimize runtime pm ops - enable/disable device only if needed */ bool als_ps_need_en; bool pxs_ps_need_en; + bool als_need_dis; + bool pxs_need_dis; struct regmap *regmap; }; @@ -152,9 +179,16 @@ struct rpr0521_data { static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL); static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL); +/* + * Start with easy freq first, whole table of freq combinations is more + * complicated. + */ +static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10"); + static struct attribute *rpr0521_attributes[] = { &iio_const_attr_in_intensity_scale_available.dev_attr.attr, &iio_const_attr_in_proximity_scale_available.dev_attr.attr, + &iio_const_attr_sampling_frequency_available.dev_attr.attr, NULL, }; @@ -164,12 +198,21 @@ static const struct attribute_group rpr0521_attribute_group = { static const struct iio_chan_spec rpr0521_channels[] = { { + .type = IIO_PROXIMITY, + .address = RPR0521_CHAN_PXS, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), + }, + { .type = IIO_INTENSITY, .modified = 1, .address = RPR0521_CHAN_ALS_DATA0, .channel2 = IIO_MOD_LIGHT_BOTH, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), }, { .type = IIO_INTENSITY, @@ -178,13 +221,8 @@ static const struct iio_chan_spec rpr0521_channels[] = { .channel2 = IIO_MOD_LIGHT_IR, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), }, - { - .type = IIO_PROXIMITY, - .address = RPR0521_CHAN_PXS, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | - BIT(IIO_CHAN_INFO_SCALE), - } }; static int rpr0521_als_enable(struct rpr0521_data *data, u8 status) @@ -197,7 +235,10 @@ static int rpr0521_als_enable(struct rpr0521_data *data, u8 status) if (ret < 0) return ret; - data->als_dev_en = true; + if (status & RPR0521_MODE_ALS_MASK) + data->als_dev_en = true; + else + data->als_dev_en = false; return 0; } @@ -212,7 +253,10 @@ static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status) if (ret < 0) return ret; - data->pxs_dev_en = true; + if (status & RPR0521_MODE_PXS_MASK) + data->pxs_dev_en = true; + else + data->pxs_dev_en = false; return 0; } @@ -224,40 +268,32 @@ static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status) * @on: state to be set for devices in @device_mask * @device_mask: bitmask specifying for which device we need to update @on state * - * We rely on rpr0521_runtime_resume to enable our @device_mask devices, but - * if (for example) PXS was enabled (pxs_dev_en = true) by a previous call to - * rpr0521_runtime_resume and we want to enable ALS we MUST set ALS enable - * bit of RPR0521_REG_MODE_CTRL here because rpr0521_runtime_resume will not - * be called twice. + * Calls for this function must be balanced so that each ON should have matching + * OFF. Otherwise pm usage_count gets out of sync. */ static int rpr0521_set_power_state(struct rpr0521_data *data, bool on, u8 device_mask) { #ifdef CONFIG_PM int ret; - u8 update_mask = 0; if (device_mask & RPR0521_MODE_ALS_MASK) { - if (on && !data->als_ps_need_en && data->pxs_dev_en) - update_mask |= RPR0521_MODE_ALS_MASK; - else - data->als_ps_need_en = on; + data->als_ps_need_en = on; + data->als_need_dis = !on; } if (device_mask & RPR0521_MODE_PXS_MASK) { - if (on && !data->pxs_ps_need_en && data->als_dev_en) - update_mask |= RPR0521_MODE_PXS_MASK; - else - data->pxs_ps_need_en = on; - } - - if (update_mask) { - ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, - update_mask, update_mask); - if (ret < 0) - return ret; + data->pxs_ps_need_en = on; + data->pxs_need_dis = !on; } + /* + * On: _resume() is called only when we are suspended + * Off: _suspend() is called after delay if _resume() is not + * called before that. + * Note: If either measurement is re-enabled before _suspend(), + * both stay enabled until _suspend(). + */ if (on) { ret = pm_runtime_get_sync(&data->client->dev); } else { @@ -273,6 +309,23 @@ static int rpr0521_set_power_state(struct rpr0521_data *data, bool on, return ret; } + + if (on) { + /* If _resume() was not called, enable measurement now. */ + if (data->als_ps_need_en) { + ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); + if (ret) + return ret; + data->als_ps_need_en = false; + } + + if (data->pxs_ps_need_en) { + ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); + if (ret) + return ret; + data->pxs_ps_need_en = false; + } + } #endif return 0; } @@ -314,6 +367,106 @@ static int rpr0521_set_gain(struct rpr0521_data *data, int chan, idx << rpr0521_gain[chan].shift); } +static int rpr0521_read_samp_freq(struct rpr0521_data *data, + enum iio_chan_type chan_type, + int *val, int *val2) +{ + int reg, ret; + + ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®); + if (ret < 0) + return ret; + + reg &= RPR0521_MODE_MEAS_TIME_MASK; + if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i)) + return -EINVAL; + + switch (chan_type) { + case IIO_INTENSITY: + *val = rpr0521_samp_freq_i[reg].als_hz; + *val2 = rpr0521_samp_freq_i[reg].als_uhz; + return 0; + + case IIO_PROXIMITY: + *val = rpr0521_samp_freq_i[reg].pxs_hz; + *val2 = rpr0521_samp_freq_i[reg].pxs_uhz; + return 0; + + default: + return -EINVAL; + } +} + +static int rpr0521_write_samp_freq_common(struct rpr0521_data *data, + enum iio_chan_type chan_type, + int val, int val2) +{ + int i; + + /* + * Ignore channel + * both pxs and als are setup only to same freq because of simplicity + */ + switch (val) { + case 0: + i = 0; + break; + + case 2: + if (val2 != 500000) + return -EINVAL; + + i = 11; + break; + + case 10: + i = 6; + break; + + default: + return -EINVAL; + } + + return regmap_update_bits(data->regmap, + RPR0521_REG_MODE_CTRL, + RPR0521_MODE_MEAS_TIME_MASK, + i); +} + +static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset) +{ + int ret; + __le16 buffer; + + ret = regmap_bulk_read(data->regmap, + RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); + + if (ret < 0) { + dev_err(&data->client->dev, "Failed to read PS OFFSET register\n"); + return ret; + } + *offset = le16_to_cpu(buffer); + + return ret; +} + +static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset) +{ + int ret; + __le16 buffer; + + buffer = cpu_to_le16(offset & 0x3ff); + ret = regmap_raw_write(data->regmap, + RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); + + if (ret < 0) { + dev_err(&data->client->dev, "Failed to write PS OFFSET register\n"); + return ret; + } + + return ret; +} + static int rpr0521_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -339,7 +492,7 @@ static int rpr0521_read_raw(struct iio_dev *indio_dev, ret = regmap_bulk_read(data->regmap, rpr0521_data_reg[chan->address].address, - &raw_data, 2); + &raw_data, sizeof(raw_data)); if (ret < 0) { rpr0521_set_power_state(data, false, device_mask); mutex_unlock(&data->lock); @@ -354,6 +507,7 @@ static int rpr0521_read_raw(struct iio_dev *indio_dev, *val = le16_to_cpu(raw_data); return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: mutex_lock(&data->lock); ret = rpr0521_get_gain(data, chan->address, val, val2); @@ -362,6 +516,25 @@ static int rpr0521_read_raw(struct iio_dev *indio_dev, return ret; return IIO_VAL_INT_PLUS_MICRO; + + case IIO_CHAN_INFO_SAMP_FREQ: + mutex_lock(&data->lock); + ret = rpr0521_read_samp_freq(data, chan->type, val, val2); + mutex_unlock(&data->lock); + if (ret < 0) + return ret; + + return IIO_VAL_INT_PLUS_MICRO; + + case IIO_CHAN_INFO_OFFSET: + mutex_lock(&data->lock); + ret = rpr0521_read_ps_offset(data, val); + mutex_unlock(&data->lock); + if (ret < 0) + return ret; + + return IIO_VAL_INT; + default: return -EINVAL; } @@ -381,6 +554,22 @@ static int rpr0521_write_raw(struct iio_dev *indio_dev, mutex_unlock(&data->lock); return ret; + + case IIO_CHAN_INFO_SAMP_FREQ: + mutex_lock(&data->lock); + ret = rpr0521_write_samp_freq_common(data, chan->type, + val, val2); + mutex_unlock(&data->lock); + + return ret; + + case IIO_CHAN_INFO_OFFSET: + mutex_lock(&data->lock); + ret = rpr0521_write_ps_offset(data, val); + mutex_unlock(&data->lock); + + return ret; + default: return -EINVAL; } @@ -419,12 +608,14 @@ static int rpr0521_init(struct rpr0521_data *data) return ret; } +#ifndef CONFIG_PM ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); if (ret < 0) return ret; ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); if (ret < 0) return ret; +#endif return 0; } @@ -510,13 +701,26 @@ static int rpr0521_probe(struct i2c_client *client, ret = pm_runtime_set_active(&client->dev); if (ret < 0) - return ret; + goto err_poweroff; pm_runtime_enable(&client->dev); pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS); pm_runtime_use_autosuspend(&client->dev); - return iio_device_register(indio_dev); + ret = iio_device_register(indio_dev); + if (ret) + goto err_pm_disable; + + return 0; + +err_pm_disable: + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); +err_poweroff: + rpr0521_poweroff(data); + + return ret; } static int rpr0521_remove(struct i2c_client *client) @@ -541,9 +745,16 @@ static int rpr0521_runtime_suspend(struct device *dev) struct rpr0521_data *data = iio_priv(indio_dev); int ret; - /* disable channels and sets {als,pxs}_dev_en to false */ mutex_lock(&data->lock); + /* If measurements are enabled, enable them on resume */ + if (!data->als_need_dis) + data->als_ps_need_en = data->als_dev_en; + if (!data->pxs_need_dis) + data->pxs_ps_need_en = data->pxs_dev_en; + + /* disable channels and sets {als,pxs}_dev_en to false */ ret = rpr0521_poweroff(data); + regcache_mark_dirty(data->regmap); mutex_unlock(&data->lock); return ret; @@ -555,6 +766,7 @@ static int rpr0521_runtime_resume(struct device *dev) struct rpr0521_data *data = iio_priv(indio_dev); int ret; + regcache_sync(data->regmap); if (data->als_ps_need_en) { ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); if (ret < 0) @@ -568,6 +780,7 @@ static int rpr0521_runtime_resume(struct device *dev) return ret; data->pxs_ps_need_en = false; } + msleep(100); //wait for first measurement result return 0; } diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c index a78b6025c465..1679181d2bdd 100644 --- a/drivers/iio/light/tsl2583.c +++ b/drivers/iio/light/tsl2583.c @@ -3,7 +3,7 @@ * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583). * * Copyright (c) 2011, TAOS Corporation. - * Copyright (c) 2016 Brian Masney <masneyb@onstation.org> + * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -27,6 +27,7 @@ #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> +#include <linux/pm_runtime.h> /* Device Registers and Masks */ #define TSL2583_CNTRL 0x00 @@ -64,6 +65,8 @@ #define TSL2583_CHIP_ID 0x90 #define TSL2583_CHIP_ID_MASK 0xf0 +#define TSL2583_POWER_OFF_DELAY_MS 2000 + /* Per-device data */ struct tsl2583_als_info { u16 als_ch0; @@ -108,7 +111,6 @@ struct tsl2583_chip { struct tsl2583_settings als_settings; int als_time_scale; int als_saturation; - bool suspended; }; struct gainadj { @@ -460,8 +462,6 @@ static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev) if (ret < 0) return ret; - chip->suspended = false; - return ret; } @@ -513,11 +513,6 @@ static ssize_t in_illuminance_calibrate_store(struct device *dev, mutex_lock(&chip->als_mutex); - if (chip->suspended) { - ret = -EBUSY; - goto done; - } - ret = tsl2583_als_calibrate(indio_dev); if (ret < 0) goto done; @@ -645,20 +640,36 @@ static const struct iio_chan_spec tsl2583_channels[] = { }, }; +static int tsl2583_set_pm_runtime_busy(struct tsl2583_chip *chip, bool on) +{ + int ret; + + if (on) { + ret = pm_runtime_get_sync(&chip->client->dev); + if (ret < 0) + pm_runtime_put_noidle(&chip->client->dev); + } else { + pm_runtime_mark_last_busy(&chip->client->dev); + ret = pm_runtime_put_autosuspend(&chip->client->dev); + } + + return ret; +} + static int tsl2583_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct tsl2583_chip *chip = iio_priv(indio_dev); - int ret = -EINVAL; + int ret, pm_ret; - mutex_lock(&chip->als_mutex); + ret = tsl2583_set_pm_runtime_busy(chip, true); + if (ret < 0) + return ret; - if (chip->suspended) { - ret = -EBUSY; - goto read_done; - } + mutex_lock(&chip->als_mutex); + ret = -EINVAL; switch (mask) { case IIO_CHAN_INFO_RAW: if (chan->type == IIO_LIGHT) { @@ -719,6 +730,18 @@ static int tsl2583_read_raw(struct iio_dev *indio_dev, read_done: mutex_unlock(&chip->als_mutex); + if (ret < 0) + return ret; + + /* + * Preserve the ret variable if the call to + * tsl2583_set_pm_runtime_busy() is successful so the reading + * (if applicable) is returned to user space. + */ + pm_ret = tsl2583_set_pm_runtime_busy(chip, false); + if (pm_ret < 0) + return pm_ret; + return ret; } @@ -727,15 +750,15 @@ static int tsl2583_write_raw(struct iio_dev *indio_dev, int val, int val2, long mask) { struct tsl2583_chip *chip = iio_priv(indio_dev); - int ret = -EINVAL; + int ret; - mutex_lock(&chip->als_mutex); + ret = tsl2583_set_pm_runtime_busy(chip, true); + if (ret < 0) + return ret; - if (chip->suspended) { - ret = -EBUSY; - goto write_done; - } + mutex_lock(&chip->als_mutex); + ret = -EINVAL; switch (mask) { case IIO_CHAN_INFO_CALIBBIAS: if (chan->type == IIO_LIGHT) { @@ -767,9 +790,15 @@ static int tsl2583_write_raw(struct iio_dev *indio_dev, break; } -write_done: mutex_unlock(&chip->als_mutex); + if (ret < 0) + return ret; + + ret = tsl2583_set_pm_runtime_busy(chip, false); + if (ret < 0) + return ret; + return ret; } @@ -803,7 +832,6 @@ static int tsl2583_probe(struct i2c_client *clientp, i2c_set_clientdata(clientp, indio_dev); mutex_init(&chip->als_mutex); - chip->suspended = true; ret = i2c_smbus_read_byte_data(clientp, TSL2583_CMD_REG | TSL2583_CHIPID); @@ -826,6 +854,11 @@ static int tsl2583_probe(struct i2c_client *clientp, indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->name = chip->client->name; + pm_runtime_enable(&clientp->dev); + pm_runtime_set_autosuspend_delay(&clientp->dev, + TSL2583_POWER_OFF_DELAY_MS); + pm_runtime_use_autosuspend(&clientp->dev); + ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); if (ret) { dev_err(&clientp->dev, "%s: iio registration failed\n", @@ -836,16 +869,25 @@ static int tsl2583_probe(struct i2c_client *clientp, /* Load up the V2 defaults (these are hard coded defaults for now) */ tsl2583_defaults(chip); - /* Make sure the chip is on */ - ret = tsl2583_chip_init_and_power_on(indio_dev); - if (ret < 0) - return ret; - dev_info(&clientp->dev, "Light sensor found.\n"); return 0; } +static int tsl2583_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct tsl2583_chip *chip = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + + pm_runtime_disable(&client->dev); + pm_runtime_set_suspended(&client->dev); + pm_runtime_put_noidle(&client->dev); + + return tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF); +} + static int __maybe_unused tsl2583_suspend(struct device *dev) { struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); @@ -855,7 +897,6 @@ static int __maybe_unused tsl2583_suspend(struct device *dev) mutex_lock(&chip->als_mutex); ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF); - chip->suspended = true; mutex_unlock(&chip->als_mutex); @@ -877,7 +918,11 @@ static int __maybe_unused tsl2583_resume(struct device *dev) return ret; } -static SIMPLE_DEV_PM_OPS(tsl2583_pm_ops, tsl2583_suspend, tsl2583_resume); +static const struct dev_pm_ops tsl2583_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(tsl2583_suspend, tsl2583_resume, NULL) +}; static struct i2c_device_id tsl2583_idtable[] = { { "tsl2580", 0 }, @@ -904,6 +949,7 @@ static struct i2c_driver tsl2583_driver = { }, .id_table = tsl2583_idtable, .probe = tsl2583_probe, + .remove = tsl2583_remove, }; module_i2c_driver(tsl2583_driver); diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c index 6325e7dc8e03..f3cb4dc05391 100644 --- a/drivers/iio/magnetometer/st_magn_spi.c +++ b/drivers/iio/magnetometer/st_magn_spi.c @@ -48,8 +48,6 @@ static int st_magn_spi_remove(struct spi_device *spi) } static const struct spi_device_id st_magn_id_table[] = { - { LSM303DLHC_MAGN_DEV_NAME }, - { LSM303DLM_MAGN_DEV_NAME }, { LIS3MDL_MAGN_DEV_NAME }, { LSM303AGR_MAGN_DEV_NAME }, {}, diff --git a/drivers/iio/multiplexer/Kconfig b/drivers/iio/multiplexer/Kconfig new file mode 100644 index 000000000000..735a7b0e6fd8 --- /dev/null +++ b/drivers/iio/multiplexer/Kconfig @@ -0,0 +1,18 @@ +# +# Multiplexer drivers +# +# When adding new entries keep the list in alphabetical order + +menu "Multiplexers" + +config IIO_MUX + tristate "IIO multiplexer driver" + select MULTIPLEXER + depends on OF || COMPILE_TEST + help + Say yes here to build support for the IIO multiplexer. + + To compile this driver as a module, choose M here: the + module will be called iio-mux. + +endmenu diff --git a/drivers/iio/multiplexer/Makefile b/drivers/iio/multiplexer/Makefile new file mode 100644 index 000000000000..68be3c4abd07 --- /dev/null +++ b/drivers/iio/multiplexer/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for industrial I/O multiplexer drivers +# + +# When adding new entries keep the list in alphabetical order +obj-$(CONFIG_IIO_MUX) += iio-mux.o diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c new file mode 100644 index 000000000000..37ba007f8dca --- /dev/null +++ b/drivers/iio/multiplexer/iio-mux.c @@ -0,0 +1,459 @@ +/* + * IIO multiplexer driver + * + * Copyright (C) 2017 Axentia Technologies AB + * + * Author: Peter Rosin <peda@axentia.se> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/err.h> +#include <linux/iio/consumer.h> +#include <linux/iio/iio.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/mux/consumer.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +struct mux_ext_info_cache { + char *data; + ssize_t size; +}; + +struct mux_child { + struct mux_ext_info_cache *ext_info_cache; +}; + +struct mux { + int cached_state; + struct mux_control *control; + struct iio_channel *parent; + struct iio_dev *indio_dev; + struct iio_chan_spec *chan; + struct iio_chan_spec_ext_info *ext_info; + struct mux_child *child; +}; + +static int iio_mux_select(struct mux *mux, int idx) +{ + struct mux_child *child = &mux->child[idx]; + struct iio_chan_spec const *chan = &mux->chan[idx]; + int ret; + int i; + + ret = mux_control_select(mux->control, chan->channel); + if (ret < 0) { + mux->cached_state = -1; + return ret; + } + + if (mux->cached_state == chan->channel) + return 0; + + if (chan->ext_info) { + for (i = 0; chan->ext_info[i].name; ++i) { + const char *attr = chan->ext_info[i].name; + struct mux_ext_info_cache *cache; + + cache = &child->ext_info_cache[i]; + + if (cache->size < 0) + continue; + + ret = iio_write_channel_ext_info(mux->parent, attr, + cache->data, + cache->size); + + if (ret < 0) { + mux_control_deselect(mux->control); + mux->cached_state = -1; + return ret; + } + } + } + mux->cached_state = chan->channel; + + return 0; +} + +static void iio_mux_deselect(struct mux *mux) +{ + mux_control_deselect(mux->control); +} + +static int mux_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct mux *mux = iio_priv(indio_dev); + int idx = chan - mux->chan; + int ret; + + ret = iio_mux_select(mux, idx); + if (ret < 0) + return ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = iio_read_channel_raw(mux->parent, val); + break; + + case IIO_CHAN_INFO_SCALE: + ret = iio_read_channel_scale(mux->parent, val, val2); + break; + + default: + ret = -EINVAL; + } + + iio_mux_deselect(mux); + + return ret; +} + +static int mux_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct mux *mux = iio_priv(indio_dev); + int idx = chan - mux->chan; + int ret; + + ret = iio_mux_select(mux, idx); + if (ret < 0) + return ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + *type = IIO_VAL_INT; + ret = iio_read_avail_channel_raw(mux->parent, vals, length); + break; + + default: + ret = -EINVAL; + } + + iio_mux_deselect(mux); + + return ret; +} + +static int mux_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct mux *mux = iio_priv(indio_dev); + int idx = chan - mux->chan; + int ret; + + ret = iio_mux_select(mux, idx); + if (ret < 0) + return ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = iio_write_channel_raw(mux->parent, val); + break; + + default: + ret = -EINVAL; + } + + iio_mux_deselect(mux); + + return ret; +} + +static const struct iio_info mux_info = { + .read_raw = mux_read_raw, + .read_avail = mux_read_avail, + .write_raw = mux_write_raw, + .driver_module = THIS_MODULE, +}; + +static ssize_t mux_read_ext_info(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *chan, char *buf) +{ + struct mux *mux = iio_priv(indio_dev); + int idx = chan - mux->chan; + ssize_t ret; + + ret = iio_mux_select(mux, idx); + if (ret < 0) + return ret; + + ret = iio_read_channel_ext_info(mux->parent, + mux->ext_info[private].name, + buf); + + iio_mux_deselect(mux); + + return ret; +} + +static ssize_t mux_write_ext_info(struct iio_dev *indio_dev, uintptr_t private, + struct iio_chan_spec const *chan, + const char *buf, size_t len) +{ + struct device *dev = indio_dev->dev.parent; + struct mux *mux = iio_priv(indio_dev); + int idx = chan - mux->chan; + char *new; + ssize_t ret; + + if (len >= PAGE_SIZE) + return -EINVAL; + + ret = iio_mux_select(mux, idx); + if (ret < 0) + return ret; + + new = devm_kmemdup(dev, buf, len + 1, GFP_KERNEL); + if (!new) { + iio_mux_deselect(mux); + return -ENOMEM; + } + + new[len] = 0; + + ret = iio_write_channel_ext_info(mux->parent, + mux->ext_info[private].name, + buf, len); + if (ret < 0) { + iio_mux_deselect(mux); + devm_kfree(dev, new); + return ret; + } + + devm_kfree(dev, mux->child[idx].ext_info_cache[private].data); + mux->child[idx].ext_info_cache[private].data = new; + mux->child[idx].ext_info_cache[private].size = len; + + iio_mux_deselect(mux); + + return ret; +} + +static int mux_configure_channel(struct device *dev, struct mux *mux, + u32 state, const char *label, int idx) +{ + struct mux_child *child = &mux->child[idx]; + struct iio_chan_spec *chan = &mux->chan[idx]; + struct iio_chan_spec const *pchan = mux->parent->channel; + char *page = NULL; + int num_ext_info; + int i; + int ret; + + chan->indexed = 1; + chan->output = pchan->output; + chan->datasheet_name = label; + chan->ext_info = mux->ext_info; + + ret = iio_get_channel_type(mux->parent, &chan->type); + if (ret < 0) { + dev_err(dev, "failed to get parent channel type\n"); + return ret; + } + + if (iio_channel_has_info(pchan, IIO_CHAN_INFO_RAW)) + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_RAW); + if (iio_channel_has_info(pchan, IIO_CHAN_INFO_SCALE)) + chan->info_mask_separate |= BIT(IIO_CHAN_INFO_SCALE); + + if (iio_channel_has_available(pchan, IIO_CHAN_INFO_RAW)) + chan->info_mask_separate_available |= BIT(IIO_CHAN_INFO_RAW); + + if (state >= mux_control_states(mux->control)) { + dev_err(dev, "too many channels\n"); + return -EINVAL; + } + + chan->channel = state; + + num_ext_info = iio_get_channel_ext_info_count(mux->parent); + if (num_ext_info) { + page = devm_kzalloc(dev, PAGE_SIZE, GFP_KERNEL); + if (!page) + return -ENOMEM; + } + child->ext_info_cache = devm_kzalloc(dev, + sizeof(*child->ext_info_cache) * + num_ext_info, GFP_KERNEL); + for (i = 0; i < num_ext_info; ++i) { + child->ext_info_cache[i].size = -1; + + if (!pchan->ext_info[i].write) + continue; + if (!pchan->ext_info[i].read) + continue; + + ret = iio_read_channel_ext_info(mux->parent, + mux->ext_info[i].name, + page); + if (ret < 0) { + dev_err(dev, "failed to get ext_info '%s'\n", + pchan->ext_info[i].name); + return ret; + } + if (ret >= PAGE_SIZE) { + dev_err(dev, "too large ext_info '%s'\n", + pchan->ext_info[i].name); + return -EINVAL; + } + + child->ext_info_cache[i].data = devm_kmemdup(dev, page, ret + 1, + GFP_KERNEL); + child->ext_info_cache[i].data[ret] = 0; + child->ext_info_cache[i].size = ret; + } + + if (page) + devm_kfree(dev, page); + + return 0; +} + +/* + * Same as of_property_for_each_string(), but also keeps track of the + * index of each string. + */ +#define of_property_for_each_string_index(np, propname, prop, s, i) \ + for (prop = of_find_property(np, propname, NULL), \ + s = of_prop_next_string(prop, NULL), \ + i = 0; \ + s; \ + s = of_prop_next_string(prop, s), \ + i++) + +static int mux_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = pdev->dev.of_node; + struct iio_dev *indio_dev; + struct iio_channel *parent; + struct mux *mux; + struct property *prop; + const char *label; + u32 state; + int sizeof_ext_info; + int children; + int sizeof_priv; + int i; + int ret; + + if (!np) + return -ENODEV; + + parent = devm_iio_channel_get(dev, "parent"); + if (IS_ERR(parent)) { + if (PTR_ERR(parent) != -EPROBE_DEFER) + dev_err(dev, "failed to get parent channel\n"); + return PTR_ERR(parent); + } + + sizeof_ext_info = iio_get_channel_ext_info_count(parent); + if (sizeof_ext_info) { + sizeof_ext_info += 1; /* one extra entry for the sentinel */ + sizeof_ext_info *= sizeof(*mux->ext_info); + } + + children = 0; + of_property_for_each_string(np, "channels", prop, label) { + if (*label) + children++; + } + if (children <= 0) { + dev_err(dev, "not even a single child\n"); + return -EINVAL; + } + + sizeof_priv = sizeof(*mux); + sizeof_priv += sizeof(*mux->child) * children; + sizeof_priv += sizeof(*mux->chan) * children; + sizeof_priv += sizeof_ext_info; + + indio_dev = devm_iio_device_alloc(dev, sizeof_priv); + if (!indio_dev) + return -ENOMEM; + + mux = iio_priv(indio_dev); + mux->child = (struct mux_child *)(mux + 1); + mux->chan = (struct iio_chan_spec *)(mux->child + children); + + platform_set_drvdata(pdev, indio_dev); + + mux->parent = parent; + mux->cached_state = -1; + + indio_dev->name = dev_name(dev); + indio_dev->dev.parent = dev; + indio_dev->info = &mux_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = mux->chan; + indio_dev->num_channels = children; + if (sizeof_ext_info) { + mux->ext_info = devm_kmemdup(dev, + parent->channel->ext_info, + sizeof_ext_info, GFP_KERNEL); + if (!mux->ext_info) + return -ENOMEM; + + for (i = 0; mux->ext_info[i].name; ++i) { + if (parent->channel->ext_info[i].read) + mux->ext_info[i].read = mux_read_ext_info; + if (parent->channel->ext_info[i].write) + mux->ext_info[i].write = mux_write_ext_info; + mux->ext_info[i].private = i; + } + } + + mux->control = devm_mux_control_get(dev, NULL); + if (IS_ERR(mux->control)) { + if (PTR_ERR(mux->control) != -EPROBE_DEFER) + dev_err(dev, "failed to get control-mux\n"); + return PTR_ERR(mux->control); + } + + i = 0; + of_property_for_each_string_index(np, "channels", prop, label, state) { + if (!*label) + continue; + + ret = mux_configure_channel(dev, mux, state, label, i++); + if (ret < 0) + return ret; + } + + ret = devm_iio_device_register(dev, indio_dev); + if (ret) { + dev_err(dev, "failed to register iio device\n"); + return ret; + } + + return 0; +} + +static const struct of_device_id mux_match[] = { + { .compatible = "io-channel-mux" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mux_match); + +static struct platform_driver mux_driver = { + .probe = mux_probe, + .driver = { + .name = "iio-mux", + .of_match_table = mux_match, + }, +}; +module_platform_driver(mux_driver); + +MODULE_DESCRIPTION("IIO multiplexer driver"); +MODULE_AUTHOR("Peter Rosin <peda@axentia.se>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/orientation/hid-sensor-rotation.c b/drivers/iio/orientation/hid-sensor-rotation.c index a97e802ca523..e9fa86c87db5 100644 --- a/drivers/iio/orientation/hid-sensor-rotation.c +++ b/drivers/iio/orientation/hid-sensor-rotation.c @@ -31,6 +31,10 @@ struct dev_rot_state { struct hid_sensor_common common_attributes; struct hid_sensor_hub_attribute_info quaternion; u32 sampled_vals[4]; + int scale_pre_decml; + int scale_post_decml; + int scale_precision; + int value_offset; }; /* Channel definitions */ @@ -41,6 +45,8 @@ static const struct iio_chan_spec dev_rot_channels[] = { .channel2 = IIO_MOD_QUATERNION, .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_HYSTERESIS) } }; @@ -80,6 +86,15 @@ static int dev_rot_read_raw(struct iio_dev *indio_dev, } else ret_type = -EINVAL; break; + case IIO_CHAN_INFO_SCALE: + vals[0] = rot_state->scale_pre_decml; + vals[1] = rot_state->scale_post_decml; + return rot_state->scale_precision; + + case IIO_CHAN_INFO_OFFSET: + *vals = rot_state->value_offset; + return IIO_VAL_INT; + case IIO_CHAN_INFO_SAMP_FREQ: ret_type = hid_sensor_read_samp_freq_value( &rot_state->common_attributes, &vals[0], &vals[1]); @@ -199,6 +214,11 @@ static int dev_rot_parse_report(struct platform_device *pdev, dev_dbg(&pdev->dev, "dev_rot: attrib size %d\n", st->quaternion.size); + st->scale_precision = hid_sensor_format_scale( + hsdev->usage, + &st->quaternion, + &st->scale_pre_decml, &st->scale_post_decml); + /* Set Sensitivity field ids, when there is no individual modifier */ if (st->common_attributes.sensitivity.index < 0) { sensor_hub_input_get_attribute_info(hsdev, @@ -218,7 +238,7 @@ static int dev_rot_parse_report(struct platform_device *pdev, static int hid_dev_rot_probe(struct platform_device *pdev) { int ret; - static char *name = "dev_rotation"; + static char *name; struct iio_dev *indio_dev; struct dev_rot_state *rot_state; struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data; @@ -234,8 +254,21 @@ static int hid_dev_rot_probe(struct platform_device *pdev) rot_state->common_attributes.hsdev = hsdev; rot_state->common_attributes.pdev = pdev; - ret = hid_sensor_parse_common_attributes(hsdev, - HID_USAGE_SENSOR_DEVICE_ORIENTATION, + switch (hsdev->usage) { + case HID_USAGE_SENSOR_DEVICE_ORIENTATION: + name = "dev_rotation"; + break; + case HID_USAGE_SENSOR_RELATIVE_ORIENTATION: + name = "relative_orientation"; + break; + case HID_USAGE_SENSOR_GEOMAGNETIC_ORIENTATION: + name = "geomagnetic_orientation"; + break; + default: + return -EINVAL; + } + + ret = hid_sensor_parse_common_attributes(hsdev, hsdev->usage, &rot_state->common_attributes); if (ret) { dev_err(&pdev->dev, "failed to setup common attributes\n"); @@ -252,8 +285,7 @@ static int hid_dev_rot_probe(struct platform_device *pdev) ret = dev_rot_parse_report(pdev, hsdev, (struct iio_chan_spec *)indio_dev->channels, - HID_USAGE_SENSOR_DEVICE_ORIENTATION, - rot_state); + hsdev->usage, rot_state); if (ret) { dev_err(&pdev->dev, "failed to setup attributes\n"); return ret; @@ -288,8 +320,7 @@ static int hid_dev_rot_probe(struct platform_device *pdev) rot_state->callbacks.send_event = dev_rot_proc_event; rot_state->callbacks.capture_sample = dev_rot_capture_sample; rot_state->callbacks.pdev = pdev; - ret = sensor_hub_register_callback(hsdev, - HID_USAGE_SENSOR_DEVICE_ORIENTATION, + ret = sensor_hub_register_callback(hsdev, hsdev->usage, &rot_state->callbacks); if (ret) { dev_err(&pdev->dev, "callback reg failed\n"); @@ -314,7 +345,7 @@ static int hid_dev_rot_remove(struct platform_device *pdev) struct iio_dev *indio_dev = platform_get_drvdata(pdev); struct dev_rot_state *rot_state = iio_priv(indio_dev); - sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_DEVICE_ORIENTATION); + sensor_hub_remove_callback(hsdev, hsdev->usage); iio_device_unregister(indio_dev); hid_sensor_remove_trigger(&rot_state->common_attributes); iio_triggered_buffer_cleanup(indio_dev); @@ -327,6 +358,14 @@ static const struct platform_device_id hid_dev_rot_ids[] = { /* Format: HID-SENSOR-usage_id_in_hex_lowercase */ .name = "HID-SENSOR-20008a", }, + { + /* Relative orientation(AG) sensor */ + .name = "HID-SENSOR-20008e", + }, + { + /* Geomagnetic orientation(AM) sensor */ + .name = "HID-SENSOR-2000c1", + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, hid_dev_rot_ids); diff --git a/drivers/iio/pressure/Kconfig b/drivers/iio/pressure/Kconfig index 5d16b252ab6b..eaa7cfcb4c2a 100644 --- a/drivers/iio/pressure/Kconfig +++ b/drivers/iio/pressure/Kconfig @@ -23,7 +23,7 @@ config BMP280 select BMP280_SPI if (SPI_MASTER) help Say yes here to build support for Bosch Sensortec BMP180 and BMP280 - pressure and temperature sensors. Also supports the BE280 with + pressure and temperature sensors. Also supports the BME280 with an additional humidity sensor channel. To compile this driver as a module, choose M here: the core module diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c index fd0edca0e656..aa61ec15c139 100644 --- a/drivers/iio/pressure/st_pressure_core.c +++ b/drivers/iio/pressure/st_pressure_core.c @@ -568,6 +568,8 @@ static const struct iio_trigger_ops st_press_trigger_ops = { int st_press_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *press_data = iio_priv(indio_dev); + struct st_sensors_platform_data *pdata = + (struct st_sensors_platform_data *)press_data->dev->platform_data; int irq = press_data->get_irq_data_ready(indio_dev); int err; @@ -603,10 +605,8 @@ int st_press_common_probe(struct iio_dev *indio_dev) press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz; /* Some devices don't support a data ready pin. */ - if (!press_data->dev->platform_data && - press_data->sensor_settings->drdy_irq.addr) - press_data->dev->platform_data = - (struct st_sensors_platform_data *)&default_press_pdata; + if (!pdata && press_data->sensor_settings->drdy_irq.addr) + pdata = (struct st_sensors_platform_data *)&default_press_pdata; err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data); if (err < 0) diff --git a/drivers/iio/pressure/zpa2326.c b/drivers/iio/pressure/zpa2326.c index e58a0ad07477..c92a95f9f52c 100644 --- a/drivers/iio/pressure/zpa2326.c +++ b/drivers/iio/pressure/zpa2326.c @@ -867,12 +867,13 @@ static int zpa2326_wait_oneshot_completion(const struct iio_dev *indio_dev, { int ret; unsigned int val; + long timeout; zpa2326_dbg(indio_dev, "waiting for one shot completion interrupt"); - ret = wait_for_completion_interruptible_timeout( + timeout = wait_for_completion_interruptible_timeout( &private->data_ready, ZPA2326_CONVERSION_JIFFIES); - if (ret > 0) + if (timeout > 0) /* * Interrupt handler completed before timeout: return operation * status. @@ -882,13 +883,16 @@ static int zpa2326_wait_oneshot_completion(const struct iio_dev *indio_dev, /* Clear all interrupts just to be sure. */ regmap_read(private->regmap, ZPA2326_INT_SOURCE_REG, &val); - if (!ret) + if (!timeout) { /* Timed out. */ + zpa2326_warn(indio_dev, "no one shot interrupt occurred (%ld)", + timeout); ret = -ETIME; - - if (ret != -ERESTARTSYS) - zpa2326_warn(indio_dev, "no one shot interrupt occurred (%d)", - ret); + } else if (timeout < 0) { + zpa2326_warn(indio_dev, + "wait for one shot interrupt cancelled"); + ret = -ERESTARTSYS; + } return ret; } diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c index aa4df0dcc8c9..0eeff29b61be 100644 --- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -176,13 +176,13 @@ static int as3935_read_raw(struct iio_dev *indio_dev, if (ret) return ret; - if (m == IIO_CHAN_INFO_RAW) - return IIO_VAL_INT; - /* storm out of range */ if (*val == AS3935_DATA_MASK) return -EINVAL; + if (m == IIO_CHAN_INFO_RAW) + return IIO_VAL_INT; + if (m == IIO_CHAN_INFO_PROCESSED) *val *= 1000; break; diff --git a/drivers/iio/proximity/sx9500.c b/drivers/iio/proximity/sx9500.c index 9ea147f1a50d..f42b3a1c75ff 100644 --- a/drivers/iio/proximity/sx9500.c +++ b/drivers/iio/proximity/sx9500.c @@ -878,8 +878,7 @@ static void sx9500_gpio_probe(struct i2c_client *client, dev = &client->dev; - data->gpiod_rst = devm_gpiod_get_index(dev, SX9500_GPIO_RESET, - 0, GPIOD_OUT_HIGH); + data->gpiod_rst = devm_gpiod_get(dev, SX9500_GPIO_RESET, GPIOD_OUT_HIGH); if (IS_ERR(data->gpiod_rst)) { dev_warn(dev, "gpio get reset pin failed\n"); data->gpiod_rst = NULL; diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/temperature/maxim_thermocouple.c index 557214202eff..d70e2e53d6a7 100644 --- a/drivers/iio/temperature/maxim_thermocouple.c +++ b/drivers/iio/temperature/maxim_thermocouple.c @@ -267,6 +267,7 @@ static int maxim_thermocouple_remove(struct spi_device *spi) static const struct spi_device_id maxim_thermocouple_id[] = { {"max6675", MAX6675}, {"max31855", MAX31855}, + {"max31856", MAX31855}, {}, }; MODULE_DEVICE_TABLE(spi, maxim_thermocouple_id); diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c index 25248d644e7c..d22bc56dd9fc 100644 --- a/drivers/iio/trigger/stm32-timer-trigger.c +++ b/drivers/iio/trigger/stm32-timer-trigger.c @@ -14,19 +14,19 @@ #include <linux/module.h> #include <linux/platform_device.h> -#define MAX_TRIGGERS 6 +#define MAX_TRIGGERS 7 #define MAX_VALIDS 5 /* List the triggers created by each timer */ static const void *triggers_table[][MAX_TRIGGERS] = { - { TIM1_TRGO, TIM1_CH1, TIM1_CH2, TIM1_CH3, TIM1_CH4,}, + { TIM1_TRGO, TIM1_TRGO2, TIM1_CH1, TIM1_CH2, TIM1_CH3, TIM1_CH4,}, { TIM2_TRGO, TIM2_CH1, TIM2_CH2, TIM2_CH3, TIM2_CH4,}, { TIM3_TRGO, TIM3_CH1, TIM3_CH2, TIM3_CH3, TIM3_CH4,}, { TIM4_TRGO, TIM4_CH1, TIM4_CH2, TIM4_CH3, TIM4_CH4,}, { TIM5_TRGO, TIM5_CH1, TIM5_CH2, TIM5_CH3, TIM5_CH4,}, { TIM6_TRGO,}, { TIM7_TRGO,}, - { TIM8_TRGO, TIM8_CH1, TIM8_CH2, TIM8_CH3, TIM8_CH4,}, + { TIM8_TRGO, TIM8_TRGO2, TIM8_CH1, TIM8_CH2, TIM8_CH3, TIM8_CH4,}, { TIM9_TRGO, TIM9_CH1, TIM9_CH2,}, { }, /* timer 10 */ { }, /* timer 11 */ @@ -56,9 +56,16 @@ struct stm32_timer_trigger { u32 max_arr; const void *triggers; const void *valids; + bool has_trgo2; }; +static bool stm32_timer_is_trgo2_name(const char *name) +{ + return !!strstr(name, "trgo2"); +} + static int stm32_timer_start(struct stm32_timer_trigger *priv, + struct iio_trigger *trig, unsigned int frequency) { unsigned long long prd, div; @@ -102,7 +109,12 @@ static int stm32_timer_start(struct stm32_timer_trigger *priv, regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, TIM_CR1_ARPE); /* Force master mode to update mode */ - regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS, 0x20); + if (stm32_timer_is_trgo2_name(trig->name)) + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, + 0x2 << TIM_CR2_MMS2_SHIFT); + else + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS, + 0x2 << TIM_CR2_MMS_SHIFT); /* Make sure that registers are updated */ regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG); @@ -150,7 +162,7 @@ static ssize_t stm32_tt_store_frequency(struct device *dev, if (freq == 0) { stm32_timer_stop(priv); } else { - ret = stm32_timer_start(priv, freq); + ret = stm32_timer_start(priv, trig, freq); if (ret) return ret; } @@ -183,6 +195,9 @@ static IIO_DEV_ATTR_SAMP_FREQ(0660, stm32_tt_read_frequency, stm32_tt_store_frequency); +#define MASTER_MODE_MAX 7 +#define MASTER_MODE2_MAX 15 + static char *master_mode_table[] = { "reset", "enable", @@ -191,7 +206,16 @@ static char *master_mode_table[] = { "OC1REF", "OC2REF", "OC3REF", - "OC4REF" + "OC4REF", + /* Master mode selection 2 only */ + "OC5REF", + "OC6REF", + "compare_pulse_OC4REF", + "compare_pulse_OC6REF", + "compare_pulse_OC4REF_r_or_OC6REF_r", + "compare_pulse_OC4REF_r_or_OC6REF_f", + "compare_pulse_OC5REF_r_or_OC6REF_r", + "compare_pulse_OC5REF_r_or_OC6REF_f", }; static ssize_t stm32_tt_show_master_mode(struct device *dev, @@ -199,10 +223,15 @@ static ssize_t stm32_tt_show_master_mode(struct device *dev, char *buf) { struct stm32_timer_trigger *priv = dev_get_drvdata(dev); + struct iio_trigger *trig = to_iio_trigger(dev); u32 cr2; regmap_read(priv->regmap, TIM_CR2, &cr2); - cr2 = (cr2 & TIM_CR2_MMS) >> TIM_CR2_MMS_SHIFT; + + if (stm32_timer_is_trgo2_name(trig->name)) + cr2 = (cr2 & TIM_CR2_MMS2) >> TIM_CR2_MMS2_SHIFT; + else + cr2 = (cr2 & TIM_CR2_MMS) >> TIM_CR2_MMS_SHIFT; return snprintf(buf, PAGE_SIZE, "%s\n", master_mode_table[cr2]); } @@ -212,13 +241,25 @@ static ssize_t stm32_tt_store_master_mode(struct device *dev, const char *buf, size_t len) { struct stm32_timer_trigger *priv = dev_get_drvdata(dev); + struct iio_trigger *trig = to_iio_trigger(dev); + u32 mask, shift, master_mode_max; int i; - for (i = 0; i < ARRAY_SIZE(master_mode_table); i++) { + if (stm32_timer_is_trgo2_name(trig->name)) { + mask = TIM_CR2_MMS2; + shift = TIM_CR2_MMS2_SHIFT; + master_mode_max = MASTER_MODE2_MAX; + } else { + mask = TIM_CR2_MMS; + shift = TIM_CR2_MMS_SHIFT; + master_mode_max = MASTER_MODE_MAX; + } + + for (i = 0; i <= master_mode_max; i++) { if (!strncmp(master_mode_table[i], buf, strlen(master_mode_table[i]))) { - regmap_update_bits(priv->regmap, TIM_CR2, - TIM_CR2_MMS, i << TIM_CR2_MMS_SHIFT); + regmap_update_bits(priv->regmap, TIM_CR2, mask, + i << shift); /* Make sure that registers are updated */ regmap_update_bits(priv->regmap, TIM_EGR, TIM_EGR_UG, TIM_EGR_UG); @@ -229,8 +270,31 @@ static ssize_t stm32_tt_store_master_mode(struct device *dev, return -EINVAL; } -static IIO_CONST_ATTR(master_mode_available, - "reset enable update compare_pulse OC1REF OC2REF OC3REF OC4REF"); +static ssize_t stm32_tt_show_master_mode_avail(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_trigger *trig = to_iio_trigger(dev); + unsigned int i, master_mode_max; + size_t len = 0; + + if (stm32_timer_is_trgo2_name(trig->name)) + master_mode_max = MASTER_MODE2_MAX; + else + master_mode_max = MASTER_MODE_MAX; + + for (i = 0; i <= master_mode_max; i++) + len += scnprintf(buf + len, PAGE_SIZE - len, + "%s ", master_mode_table[i]); + + /* replace trailing space by newline */ + buf[len - 1] = '\n'; + + return len; +} + +static IIO_DEVICE_ATTR(master_mode_available, 0444, + stm32_tt_show_master_mode_avail, NULL, 0); static IIO_DEVICE_ATTR(master_mode, 0660, stm32_tt_show_master_mode, @@ -240,7 +304,7 @@ static IIO_DEVICE_ATTR(master_mode, 0660, static struct attribute *stm32_trigger_attrs[] = { &iio_dev_attr_sampling_frequency.dev_attr.attr, &iio_dev_attr_master_mode.dev_attr.attr, - &iio_const_attr_master_mode_available.dev_attr.attr, + &iio_dev_attr_master_mode_available.dev_attr.attr, NULL, }; @@ -264,6 +328,12 @@ static int stm32_setup_iio_triggers(struct stm32_timer_trigger *priv) while (cur && *cur) { struct iio_trigger *trig; + bool cur_is_trgo2 = stm32_timer_is_trgo2_name(*cur); + + if (cur_is_trgo2 && !priv->has_trgo2) { + cur++; + continue; + } trig = devm_iio_trigger_alloc(priv->dev, "%s", *cur); if (!trig) @@ -277,7 +347,7 @@ static int stm32_setup_iio_triggers(struct stm32_timer_trigger *priv) * should only be available on trgo trigger which * is always the first in the list. */ - if (cur == priv->triggers) + if (cur == priv->triggers || cur_is_trgo2) trig->dev.groups = stm32_trigger_attr_groups; iio_trigger_set_drvdata(trig, priv); @@ -347,12 +417,70 @@ static int stm32_counter_write_raw(struct iio_dev *indio_dev, return -EINVAL; } +static int stm32_counter_validate_trigger(struct iio_dev *indio_dev, + struct iio_trigger *trig) +{ + struct stm32_timer_trigger *priv = iio_priv(indio_dev); + const char * const *cur = priv->valids; + unsigned int i = 0; + + if (!is_stm32_timer_trigger(trig)) + return -EINVAL; + + while (cur && *cur) { + if (!strncmp(trig->name, *cur, strlen(trig->name))) { + regmap_update_bits(priv->regmap, + TIM_SMCR, TIM_SMCR_TS, + i << TIM_SMCR_TS_SHIFT); + return 0; + } + cur++; + i++; + } + + return -EINVAL; +} + static const struct iio_info stm32_trigger_info = { .driver_module = THIS_MODULE, + .validate_trigger = stm32_counter_validate_trigger, .read_raw = stm32_counter_read_raw, .write_raw = stm32_counter_write_raw }; +static const char *const stm32_trigger_modes[] = { + "trigger", +}; + +static int stm32_set_trigger_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + unsigned int mode) +{ + struct stm32_timer_trigger *priv = iio_priv(indio_dev); + + regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, TIM_SMCR_SMS); + + return 0; +} + +static int stm32_get_trigger_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct stm32_timer_trigger *priv = iio_priv(indio_dev); + u32 smcr; + + regmap_read(priv->regmap, TIM_SMCR, &smcr); + + return smcr == TIM_SMCR_SMS ? 0 : -EINVAL; +} + +static const struct iio_enum stm32_trigger_mode_enum = { + .items = stm32_trigger_modes, + .num_items = ARRAY_SIZE(stm32_trigger_modes), + .set = stm32_set_trigger_mode, + .get = stm32_get_trigger_mode +}; + static const char *const stm32_enable_modes[] = { "always", "gated", @@ -536,6 +664,8 @@ static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = { IIO_ENUM_AVAILABLE("quadrature_mode", &stm32_quadrature_mode_enum), IIO_ENUM("enable_mode", IIO_SEPARATE, &stm32_enable_mode_enum), IIO_ENUM_AVAILABLE("enable_mode", &stm32_enable_mode_enum), + IIO_ENUM("trigger_mode", IIO_SEPARATE, &stm32_trigger_mode_enum), + IIO_ENUM_AVAILABLE("trigger_mode", &stm32_trigger_mode_enum), {} }; @@ -560,6 +690,7 @@ static struct stm32_timer_trigger *stm32_setup_counter_device(struct device *dev indio_dev->name = dev_name(dev); indio_dev->dev.parent = dev; indio_dev->info = &stm32_trigger_info; + indio_dev->modes = INDIO_HARDWARE_TRIGGERED; indio_dev->num_channels = 1; indio_dev->channels = &stm32_trigger_channel; indio_dev->dev.of_node = dev->of_node; @@ -584,6 +715,20 @@ bool is_stm32_timer_trigger(struct iio_trigger *trig) } EXPORT_SYMBOL(is_stm32_timer_trigger); +static void stm32_timer_detect_trgo2(struct stm32_timer_trigger *priv) +{ + u32 val; + + /* + * Master mode selection 2 bits can only be written and read back when + * timer supports it. + */ + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, TIM_CR2_MMS2); + regmap_read(priv->regmap, TIM_CR2, &val); + regmap_update_bits(priv->regmap, TIM_CR2, TIM_CR2_MMS2, 0); + priv->has_trgo2 = !!val; +} + static int stm32_timer_trigger_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -614,6 +759,7 @@ static int stm32_timer_trigger_probe(struct platform_device *pdev) priv->max_arr = ddata->max_arr; priv->triggers = triggers_table[index]; priv->valids = valids_table[index]; + stm32_timer_detect_trgo2(priv); ret = stm32_setup_iio_triggers(priv); if (ret) |