diff options
Diffstat (limited to 'drivers/iio/pressure/bmp280-core.c')
| -rw-r--r-- | drivers/iio/pressure/bmp280-core.c | 656 |
1 files changed, 562 insertions, 94 deletions
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c index 49081b729618..a8b97b9b0461 100644 --- a/drivers/iio/pressure/bmp280-core.c +++ b/drivers/iio/pressure/bmp280-core.c @@ -41,9 +41,12 @@ #include <linux/regmap.h> #include <linux/regulator/consumer.h> +#include <linux/iio/buffer.h> #include <linux/iio/iio.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include "bmp280.h" @@ -134,46 +137,169 @@ enum { BMP380_P11 = 20, }; +enum bmp280_scan { + BMP280_PRESS, + BMP280_TEMP, + BME280_HUMID, +}; + static const struct iio_chan_spec bmp280_channels[] = { { .type = IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + { + .type = IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, + }, + IIO_CHAN_SOFT_TIMESTAMP(2), +}; + +static const struct iio_chan_spec bme280_channels[] = { + { + .type = IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_HUMIDITYRELATIVE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .scan_index = 2, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, + IIO_CHAN_SOFT_TIMESTAMP(3), }; static const struct iio_chan_spec bmp380_channels[] = { { .type = IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, { .type = IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 32, + .storagebits = 32, + .endianness = IIO_CPU, + }, }, + IIO_CHAN_SOFT_TIMESTAMP(2), +}; + +static const struct iio_chan_spec bmp580_channels[] = { { - .type = IIO_HUMIDITYRELATIVE, + .type = IIO_PRESSURE, + /* PROCESSED maintained for ABI backwards compatibility */ + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), + .scan_index = 0, + .scan_type = { + .sign = 'u', + .realbits = 24, + .storagebits = 32, + .endianness = IIO_LE, + }, + }, + { + .type = IIO_TEMP, + /* PROCESSED maintained for ABI backwards compatibility */ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | + BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO), .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), + .scan_index = 1, + .scan_type = { + .sign = 's', + .realbits = 24, + .storagebits = 32, + .endianness = IIO_LE, + }, }, + IIO_CHAN_SOFT_TIMESTAMP(2), }; static int bmp280_read_calib(struct bmp280_data *data) @@ -289,7 +415,7 @@ static int bme280_read_humid_adc(struct bmp280_data *data, u16 *adc_humidity) int ret; ret = regmap_bulk_read(data->regmap, BME280_REG_HUMIDITY_MSB, - &data->be16, sizeof(data->be16)); + &data->be16, BME280_NUM_HUMIDITY_BYTES); if (ret) { dev_err(data->dev, "failed to read humidity\n"); return ret; @@ -335,7 +461,7 @@ static int bmp280_read_temp_adc(struct bmp280_data *data, u32 *adc_temp) int ret; ret = regmap_bulk_read(data->regmap, BMP280_REG_TEMP_MSB, - data->buf, sizeof(data->buf)); + data->buf, BMP280_NUM_TEMP_BYTES); if (ret) { dev_err(data->dev, "failed to read temperature\n"); return ret; @@ -396,7 +522,7 @@ static int bmp280_read_press_adc(struct bmp280_data *data, u32 *adc_press) int ret; ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB, - data->buf, sizeof(data->buf)); + data->buf, BMP280_NUM_PRESS_BYTES); if (ret) { dev_err(data->dev, "failed to read pressure\n"); return ret; @@ -445,10 +571,8 @@ static u32 bmp280_compensate_press(struct bmp280_data *data, return (u32)p; } -static int bmp280_read_temp(struct bmp280_data *data, - int *val, int *val2) +static int bmp280_read_temp(struct bmp280_data *data, s32 *comp_temp) { - s32 comp_temp; u32 adc_temp; int ret; @@ -456,16 +580,15 @@ static int bmp280_read_temp(struct bmp280_data *data, if (ret) return ret; - comp_temp = bmp280_compensate_temp(data, adc_temp); + *comp_temp = bmp280_compensate_temp(data, adc_temp); - *val = comp_temp * 10; - return IIO_VAL_INT; + return 0; } -static int bmp280_read_press(struct bmp280_data *data, - int *val, int *val2) +static int bmp280_read_press(struct bmp280_data *data, u32 *comp_press) { - u32 comp_press, adc_press, t_fine; + u32 adc_press; + s32 t_fine; int ret; ret = bmp280_get_t_fine(data, &t_fine); @@ -476,17 +599,13 @@ static int bmp280_read_press(struct bmp280_data *data, if (ret) return ret; - comp_press = bmp280_compensate_press(data, adc_press, t_fine); + *comp_press = bmp280_compensate_press(data, adc_press, t_fine); - *val = comp_press; - *val2 = 256000; - - return IIO_VAL_FRACTIONAL; + return 0; } -static int bme280_read_humid(struct bmp280_data *data, int *val, int *val2) +static int bme280_read_humid(struct bmp280_data *data, u32 *comp_humidity) { - u32 comp_humidity; u16 adc_humidity; s32 t_fine; int ret; @@ -499,11 +618,9 @@ static int bme280_read_humid(struct bmp280_data *data, int *val, int *val2) if (ret) return ret; - comp_humidity = bme280_compensate_humidity(data, adc_humidity, t_fine); + *comp_humidity = bme280_compensate_humidity(data, adc_humidity, t_fine); - *val = comp_humidity * 1000 / 1024; - - return IIO_VAL_INT; + return 0; } static int bmp280_read_raw_impl(struct iio_dev *indio_dev, @@ -511,6 +628,8 @@ static int bmp280_read_raw_impl(struct iio_dev *indio_dev, int *val, int *val2, long mask) { struct bmp280_data *data = iio_priv(indio_dev); + int chan_value; + int ret; guard(mutex)(&data->lock); @@ -518,11 +637,72 @@ static int bmp280_read_raw_impl(struct iio_dev *indio_dev, case IIO_CHAN_INFO_PROCESSED: switch (chan->type) { case IIO_HUMIDITYRELATIVE: - return data->chip_info->read_humid(data, val, val2); + ret = data->chip_info->read_humid(data, &chan_value); + if (ret) + return ret; + + *val = data->chip_info->humid_coeffs[0] * chan_value; + *val2 = data->chip_info->humid_coeffs[1]; + return data->chip_info->humid_coeffs_type; + case IIO_PRESSURE: + ret = data->chip_info->read_press(data, &chan_value); + if (ret) + return ret; + + *val = data->chip_info->press_coeffs[0] * chan_value; + *val2 = data->chip_info->press_coeffs[1]; + return data->chip_info->press_coeffs_type; + case IIO_TEMP: + ret = data->chip_info->read_temp(data, &chan_value); + if (ret) + return ret; + + *val = data->chip_info->temp_coeffs[0] * chan_value; + *val2 = data->chip_info->temp_coeffs[1]; + return data->chip_info->temp_coeffs_type; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + ret = data->chip_info->read_humid(data, &chan_value); + if (ret) + return ret; + + *val = chan_value; + return IIO_VAL_INT; + case IIO_PRESSURE: + ret = data->chip_info->read_press(data, &chan_value); + if (ret) + return ret; + + *val = chan_value; + return IIO_VAL_INT; + case IIO_TEMP: + ret = data->chip_info->read_temp(data, &chan_value); + if (ret) + return ret; + + *val = chan_value; + return IIO_VAL_INT; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_HUMIDITYRELATIVE: + *val = data->chip_info->humid_coeffs[0]; + *val2 = data->chip_info->humid_coeffs[1]; + return data->chip_info->humid_coeffs_type; case IIO_PRESSURE: - return data->chip_info->read_press(data, val, val2); + *val = data->chip_info->press_coeffs[0]; + *val2 = data->chip_info->press_coeffs[1]; + return data->chip_info->press_coeffs_type; case IIO_TEMP: - return data->chip_info->read_temp(data, val, val2); + *val = data->chip_info->temp_coeffs[0]; + *val2 = data->chip_info->temp_coeffs[1]; + return data->chip_info->temp_coeffs_type; default: return -EINVAL; } @@ -793,6 +973,16 @@ static const struct iio_info bmp280_info = { .write_raw = &bmp280_write_raw, }; +static const unsigned long bmp280_avail_scan_masks[] = { + BIT(BMP280_TEMP) | BIT(BMP280_PRESS), + 0 +}; + +static const unsigned long bme280_avail_scan_masks[] = { + BIT(BME280_HUMID) | BIT(BMP280_TEMP) | BIT(BMP280_PRESS), + 0 +}; + static int bmp280_chip_config(struct bmp280_data *data) { u8 osrs = FIELD_PREP(BMP280_OSRS_TEMP_MASK, data->oversampling_temp + 1) | @@ -820,8 +1010,57 @@ static int bmp280_chip_config(struct bmp280_data *data) return ret; } +static irqreturn_t bmp280_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bmp280_data *data = iio_priv(indio_dev); + s32 adc_temp, adc_press, t_fine; + int ret; + + guard(mutex)(&data->lock); + + /* Burst read data registers */ + ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB, + data->buf, BMP280_BURST_READ_BYTES); + if (ret) { + dev_err(data->dev, "failed to burst read sensor data\n"); + goto out; + } + + /* Temperature calculations */ + adc_temp = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[3])); + if (adc_temp == BMP280_TEMP_SKIPPED) { + dev_err(data->dev, "reading temperature skipped\n"); + goto out; + } + + data->sensor_data[1] = bmp280_compensate_temp(data, adc_temp); + + /* Pressure calculations */ + adc_press = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[0])); + if (adc_press == BMP280_PRESS_SKIPPED) { + dev_err(data->dev, "reading pressure skipped\n"); + goto out; + } + + t_fine = bmp280_calc_t_fine(data, adc_temp); + + data->sensor_data[0] = bmp280_compensate_press(data, adc_press, t_fine); + + iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data, + iio_get_time_ns(indio_dev)); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static const int bmp280_oversampling_avail[] = { 1, 2, 4, 8, 16 }; static const u8 bmp280_chip_ids[] = { BMP280_CHIP_ID }; +static const int bmp280_temp_coeffs[] = { 10, 1 }; +static const int bmp280_press_coeffs[] = { 1, 256000 }; const struct bmp280_chip_info bmp280_chip_info = { .id_reg = BMP280_REG_ID, @@ -830,7 +1069,8 @@ const struct bmp280_chip_info bmp280_chip_info = { .regmap_config = &bmp280_regmap_config, .start_up_time = 2000, .channels = bmp280_channels, - .num_channels = 2, + .num_channels = ARRAY_SIZE(bmp280_channels), + .avail_scan_masks = bmp280_avail_scan_masks, .oversampling_temp_avail = bmp280_oversampling_avail, .num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail), @@ -850,10 +1090,17 @@ const struct bmp280_chip_info bmp280_chip_info = { .num_oversampling_press_avail = ARRAY_SIZE(bmp280_oversampling_avail), .oversampling_press_default = BMP280_OSRS_PRESS_16X - 1, + .temp_coeffs = bmp280_temp_coeffs, + .temp_coeffs_type = IIO_VAL_FRACTIONAL, + .press_coeffs = bmp280_press_coeffs, + .press_coeffs_type = IIO_VAL_FRACTIONAL, + .chip_config = bmp280_chip_config, .read_temp = bmp280_read_temp, .read_press = bmp280_read_press, .read_calib = bmp280_read_calib, + + .trigger_handler = bmp280_trigger_handler, }; EXPORT_SYMBOL_NS(bmp280_chip_info, IIO_BMP280); @@ -876,16 +1123,74 @@ static int bme280_chip_config(struct bmp280_data *data) return bmp280_chip_config(data); } +static irqreturn_t bme280_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bmp280_data *data = iio_priv(indio_dev); + s32 adc_temp, adc_press, adc_humidity, t_fine; + int ret; + + guard(mutex)(&data->lock); + + /* Burst read data registers */ + ret = regmap_bulk_read(data->regmap, BMP280_REG_PRESS_MSB, + data->buf, BME280_BURST_READ_BYTES); + if (ret) { + dev_err(data->dev, "failed to burst read sensor data\n"); + goto out; + } + + /* Temperature calculations */ + adc_temp = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[3])); + if (adc_temp == BMP280_TEMP_SKIPPED) { + dev_err(data->dev, "reading temperature skipped\n"); + goto out; + } + + data->sensor_data[1] = bmp280_compensate_temp(data, adc_temp); + + /* Pressure calculations */ + adc_press = FIELD_GET(BMP280_MEAS_TRIM_MASK, get_unaligned_be24(&data->buf[0])); + if (adc_press == BMP280_PRESS_SKIPPED) { + dev_err(data->dev, "reading pressure skipped\n"); + goto out; + } + + t_fine = bmp280_calc_t_fine(data, adc_temp); + + data->sensor_data[0] = bmp280_compensate_press(data, adc_press, t_fine); + + /* Humidity calculations */ + adc_humidity = get_unaligned_be16(&data->buf[6]); + + if (adc_humidity == BMP280_HUMIDITY_SKIPPED) { + dev_err(data->dev, "reading humidity skipped\n"); + goto out; + } + data->sensor_data[2] = bme280_compensate_humidity(data, adc_humidity, t_fine); + + iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data, + iio_get_time_ns(indio_dev)); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static const u8 bme280_chip_ids[] = { BME280_CHIP_ID }; +static const int bme280_humid_coeffs[] = { 1000, 1024 }; const struct bmp280_chip_info bme280_chip_info = { .id_reg = BMP280_REG_ID, .chip_id = bme280_chip_ids, .num_chip_id = ARRAY_SIZE(bme280_chip_ids), - .regmap_config = &bmp280_regmap_config, + .regmap_config = &bme280_regmap_config, .start_up_time = 2000, - .channels = bmp280_channels, - .num_channels = 3, + .channels = bme280_channels, + .num_channels = ARRAY_SIZE(bme280_channels), + .avail_scan_masks = bme280_avail_scan_masks, .oversampling_temp_avail = bmp280_oversampling_avail, .num_oversampling_temp_avail = ARRAY_SIZE(bmp280_oversampling_avail), @@ -899,11 +1204,20 @@ const struct bmp280_chip_info bme280_chip_info = { .num_oversampling_humid_avail = ARRAY_SIZE(bmp280_oversampling_avail), .oversampling_humid_default = BME280_OSRS_HUMIDITY_16X - 1, + .temp_coeffs = bmp280_temp_coeffs, + .temp_coeffs_type = IIO_VAL_FRACTIONAL, + .press_coeffs = bmp280_press_coeffs, + .press_coeffs_type = IIO_VAL_FRACTIONAL, + .humid_coeffs = bme280_humid_coeffs, + .humid_coeffs_type = IIO_VAL_FRACTIONAL, + .chip_config = bme280_chip_config, .read_temp = bmp280_read_temp, .read_press = bmp280_read_press, .read_humid = bme280_read_humid, .read_calib = bme280_read_calib, + + .trigger_handler = bme280_trigger_handler, }; EXPORT_SYMBOL_NS(bme280_chip_info, IIO_BMP280); @@ -958,7 +1272,7 @@ static int bmp380_read_temp_adc(struct bmp280_data *data, u32 *adc_temp) int ret; ret = regmap_bulk_read(data->regmap, BMP380_REG_TEMP_XLSB, - data->buf, sizeof(data->buf)); + data->buf, BMP280_NUM_TEMP_BYTES); if (ret) { dev_err(data->dev, "failed to read temperature\n"); return ret; @@ -1027,7 +1341,7 @@ static int bmp380_read_press_adc(struct bmp280_data *data, u32 *adc_press) int ret; ret = regmap_bulk_read(data->regmap, BMP380_REG_PRESS_XLSB, - data->buf, sizeof(data->buf)); + data->buf, BMP280_NUM_PRESS_BYTES); if (ret) { dev_err(data->dev, "failed to read pressure\n"); return ret; @@ -1091,9 +1405,8 @@ static u32 bmp380_compensate_press(struct bmp280_data *data, return comp_press; } -static int bmp380_read_temp(struct bmp280_data *data, int *val, int *val2) +static int bmp380_read_temp(struct bmp280_data *data, s32 *comp_temp) { - s32 comp_temp; u32 adc_temp; int ret; @@ -1101,15 +1414,14 @@ static int bmp380_read_temp(struct bmp280_data *data, int *val, int *val2) if (ret) return ret; - comp_temp = bmp380_compensate_temp(data, adc_temp); + *comp_temp = bmp380_compensate_temp(data, adc_temp); - *val = comp_temp * 10; - return IIO_VAL_INT; + return 0; } -static int bmp380_read_press(struct bmp280_data *data, int *val, int *val2) +static int bmp380_read_press(struct bmp280_data *data, u32 *comp_press) { - u32 adc_press, comp_press, t_fine; + u32 adc_press, t_fine; int ret; ret = bmp380_get_t_fine(data, &t_fine); @@ -1120,12 +1432,9 @@ static int bmp380_read_press(struct bmp280_data *data, int *val, int *val2) if (ret) return ret; - comp_press = bmp380_compensate_press(data, adc_press, t_fine); - - *val = comp_press; - *val2 = 100000; + *comp_press = bmp380_compensate_press(data, adc_press, t_fine); - return IIO_VAL_FRACTIONAL; + return 0; } static int bmp380_read_calib(struct bmp280_data *data) @@ -1272,10 +1581,11 @@ static int bmp380_chip_config(struct bmp280_data *data) } /* * Waits for measurement before checking configuration error - * flag. Selected longest measure time indicated in - * section 3.9.1 in the datasheet. + * flag. Selected longest measurement time, calculated from + * formula in datasheet section 3.9.2 with an offset of ~+15% + * as it seen as well in table 3.9.1. */ - msleep(80); + msleep(150); /* Check config error flag */ ret = regmap_read(data->regmap, BMP380_REG_ERROR, &tmp); @@ -1293,9 +1603,58 @@ static int bmp380_chip_config(struct bmp280_data *data) return 0; } +static irqreturn_t bmp380_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bmp280_data *data = iio_priv(indio_dev); + s32 adc_temp, adc_press, t_fine; + int ret; + + guard(mutex)(&data->lock); + + /* Burst read data registers */ + ret = regmap_bulk_read(data->regmap, BMP380_REG_PRESS_XLSB, + data->buf, BMP280_BURST_READ_BYTES); + if (ret) { + dev_err(data->dev, "failed to burst read sensor data\n"); + goto out; + } + + /* Temperature calculations */ + adc_temp = get_unaligned_le24(&data->buf[3]); + if (adc_temp == BMP380_TEMP_SKIPPED) { + dev_err(data->dev, "reading temperature skipped\n"); + goto out; + } + + data->sensor_data[1] = bmp380_compensate_temp(data, adc_temp); + + /* Pressure calculations */ + adc_press = get_unaligned_le24(&data->buf[0]); + if (adc_press == BMP380_PRESS_SKIPPED) { + dev_err(data->dev, "reading pressure skipped\n"); + goto out; + } + + t_fine = bmp380_calc_t_fine(data, adc_temp); + + data->sensor_data[0] = bmp380_compensate_press(data, adc_press, t_fine); + + iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data, + iio_get_time_ns(indio_dev)); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static const int bmp380_oversampling_avail[] = { 1, 2, 4, 8, 16, 32 }; static const int bmp380_iir_filter_coeffs_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128}; static const u8 bmp380_chip_ids[] = { BMP380_CHIP_ID, BMP390_CHIP_ID }; +static const int bmp380_temp_coeffs[] = { 10, 1 }; +static const int bmp380_press_coeffs[] = { 1, 100000 }; const struct bmp280_chip_info bmp380_chip_info = { .id_reg = BMP380_REG_ID, @@ -1305,7 +1664,8 @@ const struct bmp280_chip_info bmp380_chip_info = { .spi_read_extra_byte = true, .start_up_time = 2000, .channels = bmp380_channels, - .num_channels = 2, + .num_channels = ARRAY_SIZE(bmp380_channels), + .avail_scan_masks = bmp280_avail_scan_masks, .oversampling_temp_avail = bmp380_oversampling_avail, .num_oversampling_temp_avail = ARRAY_SIZE(bmp380_oversampling_avail), @@ -1323,11 +1683,18 @@ const struct bmp280_chip_info bmp380_chip_info = { .num_iir_filter_coeffs_avail = ARRAY_SIZE(bmp380_iir_filter_coeffs_avail), .iir_filter_coeff_default = 2, + .temp_coeffs = bmp380_temp_coeffs, + .temp_coeffs_type = IIO_VAL_FRACTIONAL, + .press_coeffs = bmp380_press_coeffs, + .press_coeffs_type = IIO_VAL_FRACTIONAL, + .chip_config = bmp380_chip_config, .read_temp = bmp380_read_temp, .read_press = bmp380_read_press, .read_calib = bmp380_read_calib, .preinit = bmp380_preinit, + + .trigger_handler = bmp380_trigger_handler, }; EXPORT_SYMBOL_NS(bmp380_chip_info, IIO_BMP280); @@ -1443,58 +1810,48 @@ static int bmp580_nvm_operation(struct bmp280_data *data, bool is_write) * for what is expected on IIO ABI. */ -static int bmp580_read_temp(struct bmp280_data *data, int *val, int *val2) +static int bmp580_read_temp(struct bmp280_data *data, s32 *raw_temp) { - s32 raw_temp; + s32 value_temp; int ret; - ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, data->buf, - sizeof(data->buf)); + ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, + data->buf, BMP280_NUM_TEMP_BYTES); if (ret) { dev_err(data->dev, "failed to read temperature\n"); return ret; } - raw_temp = get_unaligned_le24(data->buf); - if (raw_temp == BMP580_TEMP_SKIPPED) { + value_temp = get_unaligned_le24(data->buf); + if (value_temp == BMP580_TEMP_SKIPPED) { dev_err(data->dev, "reading temperature skipped\n"); return -EIO; } + *raw_temp = sign_extend32(value_temp, 23); - /* - * Temperature is returned in Celsius degrees in fractional - * form down 2^16. We rescale by x1000 to return millidegrees - * Celsius to respect IIO ABI. - */ - raw_temp = sign_extend32(raw_temp, 23); - *val = ((s64)raw_temp * 1000) / (1 << 16); - return IIO_VAL_INT; + return 0; } -static int bmp580_read_press(struct bmp280_data *data, int *val, int *val2) +static int bmp580_read_press(struct bmp280_data *data, u32 *raw_press) { - u32 raw_press; + u32 value_press; int ret; - ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB, data->buf, - sizeof(data->buf)); + ret = regmap_bulk_read(data->regmap, BMP580_REG_PRESS_XLSB, + data->buf, BMP280_NUM_PRESS_BYTES); if (ret) { dev_err(data->dev, "failed to read pressure\n"); return ret; } - raw_press = get_unaligned_le24(data->buf); - if (raw_press == BMP580_PRESS_SKIPPED) { + value_press = get_unaligned_le24(data->buf); + if (value_press == BMP580_PRESS_SKIPPED) { dev_err(data->dev, "reading pressure skipped\n"); return -EIO; } - /* - * Pressure is returned in Pascals in fractional form down 2^16. - * We rescale /1000 to convert to kilopascal to respect IIO ABI. - */ - *val = raw_press; - *val2 = 64000; /* 2^6 * 1000 */ - return IIO_VAL_FRACTIONAL; + *raw_press = value_press; + + return 0; } static const int bmp580_odr_table[][2] = { @@ -1828,8 +2185,43 @@ static int bmp580_chip_config(struct bmp280_data *data) return 0; } +static irqreturn_t bmp580_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bmp280_data *data = iio_priv(indio_dev); + int ret; + + guard(mutex)(&data->lock); + + /* Burst read data registers */ + ret = regmap_bulk_read(data->regmap, BMP580_REG_TEMP_XLSB, + data->buf, BMP280_BURST_READ_BYTES); + if (ret) { + dev_err(data->dev, "failed to burst read sensor data\n"); + goto out; + } + + /* Temperature calculations */ + memcpy(&data->sensor_data[1], &data->buf[0], 3); + + /* Pressure calculations */ + memcpy(&data->sensor_data[0], &data->buf[3], 3); + + iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data, + iio_get_time_ns(indio_dev)); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static const int bmp580_oversampling_avail[] = { 1, 2, 4, 8, 16, 32, 64, 128 }; static const u8 bmp580_chip_ids[] = { BMP580_CHIP_ID, BMP580_CHIP_ID_ALT }; +/* Instead of { 1000, 16 } we do this, to avoid overflow issues */ +static const int bmp580_temp_coeffs[] = { 125, 13 }; +static const int bmp580_press_coeffs[] = { 1, 64000}; const struct bmp280_chip_info bmp580_chip_info = { .id_reg = BMP580_REG_CHIP_ID, @@ -1837,8 +2229,9 @@ const struct bmp280_chip_info bmp580_chip_info = { .num_chip_id = ARRAY_SIZE(bmp580_chip_ids), .regmap_config = &bmp580_regmap_config, .start_up_time = 2000, - .channels = bmp380_channels, - .num_channels = 2, + .channels = bmp580_channels, + .num_channels = ARRAY_SIZE(bmp580_channels), + .avail_scan_masks = bmp280_avail_scan_masks, .oversampling_temp_avail = bmp580_oversampling_avail, .num_oversampling_temp_avail = ARRAY_SIZE(bmp580_oversampling_avail), @@ -1856,16 +2249,23 @@ const struct bmp280_chip_info bmp580_chip_info = { .num_iir_filter_coeffs_avail = ARRAY_SIZE(bmp380_iir_filter_coeffs_avail), .iir_filter_coeff_default = 2, + .temp_coeffs = bmp580_temp_coeffs, + .temp_coeffs_type = IIO_VAL_FRACTIONAL_LOG2, + .press_coeffs = bmp580_press_coeffs, + .press_coeffs_type = IIO_VAL_FRACTIONAL, + .chip_config = bmp580_chip_config, .read_temp = bmp580_read_temp, .read_press = bmp580_read_press, .preinit = bmp580_preinit, + + .trigger_handler = bmp580_trigger_handler, }; EXPORT_SYMBOL_NS(bmp580_chip_info, IIO_BMP280); static int bmp180_wait_for_eoc(struct bmp280_data *data, u8 ctrl_meas) { - const int conversion_time_max[] = { 4500, 7500, 13500, 25500 }; + static const int conversion_time_max[] = { 4500, 7500, 13500, 25500 }; unsigned int delay_us; unsigned int ctrl; int ret; @@ -2011,9 +2411,8 @@ static s32 bmp180_compensate_temp(struct bmp280_data *data, u32 adc_temp) return (bmp180_calc_t_fine(data, adc_temp) + 8) / 16; } -static int bmp180_read_temp(struct bmp280_data *data, int *val, int *val2) +static int bmp180_read_temp(struct bmp280_data *data, s32 *comp_temp) { - s32 comp_temp; u32 adc_temp; int ret; @@ -2021,10 +2420,9 @@ static int bmp180_read_temp(struct bmp280_data *data, int *val, int *val2) if (ret) return ret; - comp_temp = bmp180_compensate_temp(data, adc_temp); + *comp_temp = bmp180_compensate_temp(data, adc_temp); - *val = comp_temp * 100; - return IIO_VAL_INT; + return 0; } static int bmp180_read_press_adc(struct bmp280_data *data, u32 *adc_press) @@ -2040,7 +2438,7 @@ static int bmp180_read_press_adc(struct bmp280_data *data, u32 *adc_press) return ret; ret = regmap_bulk_read(data->regmap, BMP180_REG_OUT_MSB, - data->buf, sizeof(data->buf)); + data->buf, BMP280_NUM_PRESS_BYTES); if (ret) { dev_err(data->dev, "failed to read pressure\n"); return ret; @@ -2087,9 +2485,9 @@ static u32 bmp180_compensate_press(struct bmp280_data *data, u32 adc_press, return p + ((x1 + x2 + 3791) >> 4); } -static int bmp180_read_press(struct bmp280_data *data, int *val, int *val2) +static int bmp180_read_press(struct bmp280_data *data, u32 *comp_press) { - u32 comp_press, adc_press; + u32 adc_press; s32 t_fine; int ret; @@ -2101,12 +2499,9 @@ static int bmp180_read_press(struct bmp280_data *data, int *val, int *val2) if (ret) return ret; - comp_press = bmp180_compensate_press(data, adc_press, t_fine); - - *val = comp_press; - *val2 = 1000; + *comp_press = bmp180_compensate_press(data, adc_press, t_fine); - return IIO_VAL_FRACTIONAL; + return 0; } static int bmp180_chip_config(struct bmp280_data *data) @@ -2114,9 +2509,41 @@ static int bmp180_chip_config(struct bmp280_data *data) return 0; } +static irqreturn_t bmp180_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct bmp280_data *data = iio_priv(indio_dev); + int ret, chan_value; + + guard(mutex)(&data->lock); + + ret = bmp180_read_temp(data, &chan_value); + if (ret) + goto out; + + data->sensor_data[1] = chan_value; + + ret = bmp180_read_press(data, &chan_value); + if (ret) + goto out; + + data->sensor_data[0] = chan_value; + + iio_push_to_buffers_with_timestamp(indio_dev, &data->sensor_data, + iio_get_time_ns(indio_dev)); + +out: + iio_trigger_notify_done(indio_dev->trig); + + return IRQ_HANDLED; +} + static const int bmp180_oversampling_temp_avail[] = { 1 }; static const int bmp180_oversampling_press_avail[] = { 1, 2, 4, 8 }; static const u8 bmp180_chip_ids[] = { BMP180_CHIP_ID }; +static const int bmp180_temp_coeffs[] = { 100, 1 }; +static const int bmp180_press_coeffs[] = { 1, 1000 }; const struct bmp280_chip_info bmp180_chip_info = { .id_reg = BMP280_REG_ID, @@ -2125,7 +2552,8 @@ const struct bmp280_chip_info bmp180_chip_info = { .regmap_config = &bmp180_regmap_config, .start_up_time = 2000, .channels = bmp280_channels, - .num_channels = 2, + .num_channels = ARRAY_SIZE(bmp280_channels), + .avail_scan_masks = bmp280_avail_scan_masks, .oversampling_temp_avail = bmp180_oversampling_temp_avail, .num_oversampling_temp_avail = @@ -2137,10 +2565,17 @@ const struct bmp280_chip_info bmp180_chip_info = { ARRAY_SIZE(bmp180_oversampling_press_avail), .oversampling_press_default = BMP180_MEAS_PRESS_8X, + .temp_coeffs = bmp180_temp_coeffs, + .temp_coeffs_type = IIO_VAL_FRACTIONAL, + .press_coeffs = bmp180_press_coeffs, + .press_coeffs_type = IIO_VAL_FRACTIONAL, + .chip_config = bmp180_chip_config, .read_temp = bmp180_read_temp, .read_press = bmp180_read_press, .read_calib = bmp180_read_calib, + + .trigger_handler = bmp180_trigger_handler, }; EXPORT_SYMBOL_NS(bmp180_chip_info, IIO_BMP280); @@ -2186,6 +2621,30 @@ static int bmp085_fetch_eoc_irq(struct device *dev, return 0; } +static int bmp280_buffer_preenable(struct iio_dev *indio_dev) +{ + struct bmp280_data *data = iio_priv(indio_dev); + + pm_runtime_get_sync(data->dev); + + return 0; +} + +static int bmp280_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct bmp280_data *data = iio_priv(indio_dev); + + pm_runtime_mark_last_busy(data->dev); + pm_runtime_put_autosuspend(data->dev); + + return 0; +} + +static const struct iio_buffer_setup_ops bmp280_buffer_setup_ops = { + .preenable = bmp280_buffer_preenable, + .postdisable = bmp280_buffer_postdisable, +}; + static void bmp280_pm_disable(void *data) { struct device *dev = data; @@ -2232,6 +2691,7 @@ int bmp280_common_probe(struct device *dev, /* Apply initial values from chip info structure */ indio_dev->channels = chip_info->channels; indio_dev->num_channels = chip_info->num_channels; + indio_dev->available_scan_masks = chip_info->avail_scan_masks; data->oversampling_press = chip_info->oversampling_press_default; data->oversampling_humid = chip_info->oversampling_humid_default; data->oversampling_temp = chip_info->oversampling_temp_default; @@ -2317,6 +2777,14 @@ int bmp280_common_probe(struct device *dev, "failed to read calibration coefficients\n"); } + ret = devm_iio_triggered_buffer_setup(data->dev, indio_dev, + iio_pollfunc_store_time, + data->chip_info->trigger_handler, + &bmp280_buffer_setup_ops); + if (ret) + return dev_err_probe(data->dev, ret, + "iio triggered buffer setup failed\n"); + /* * Attempt to grab an optional EOC IRQ - only the BMP085 has this * however as it happens, the BMP085 shares the chip ID of BMP180 |