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-rw-r--r--drivers/iio/dac/Kconfig33
-rw-r--r--drivers/iio/dac/Makefile3
-rw-r--r--drivers/iio/dac/ad5686-spi.c119
-rw-r--r--drivers/iio/dac/ad5686.c428
-rw-r--r--drivers/iio/dac/ad5686.h145
-rw-r--r--drivers/iio/dac/ad5696-i2c.c102
-rw-r--r--drivers/iio/dac/ltc2632.c89
-rw-r--r--drivers/iio/dac/ti-dac5571.c439
8 files changed, 1153 insertions, 205 deletions
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 76db0768e454..06e90debb9f5 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -131,16 +131,31 @@ config LTC2632
module will be called ltc2632.
config AD5686
- tristate "Analog Devices AD5686R/AD5685R/AD5684R DAC SPI driver"
+ tristate
+
+config AD5686_SPI
+ tristate "Analog Devices AD5686 and similar multi-channel DACs (SPI)"
depends on SPI
+ select AD5686
help
- Say yes here to build support for Analog Devices AD5686R, AD5685R,
- AD5684R, AD5791 Voltage Output Digital to
- Analog Converter.
+ Say yes here to build support for Analog Devices AD5672R, AD5676,
+ AD5676R, AD5684, AD5684R, AD5684R, AD5685R, AD5686, AD5686R.
+ Voltage Output Digital to Analog Converter.
To compile this driver as a module, choose M here: the
module will be called ad5686.
+config AD5696_I2C
+ tristate "Analog Devices AD5696 and similar multi-channel DACs (I2C)"
+ depends on I2C
+ select AD5686
+ help
+ Say yes here to build support for Analog Devices AD5671R, AD5675R,
+ AD5694, AD5694R, AD5695R, AD5696, AD5696R Voltage Output Digital to
+ Analog Converter.
+ To compile this driver as a module, choose M here: the module will be
+ called ad5696.
+
config AD5755
tristate "Analog Devices AD5755/AD5755-1/AD5757/AD5735/AD5737 DAC driver"
depends on SPI_MASTER
@@ -321,6 +336,16 @@ config TI_DAC082S085
If compiled as a module, it will be called ti-dac082s085.
+config TI_DAC5571
+ tristate "Texas Instruments 8/10/12/16-bit 1/2/4-channel DAC driver"
+ depends on I2C
+ help
+ Driver for the Texas Instruments
+ DAC5571, DAC6571, DAC7571, DAC5574, DAC6574, DAC7574, DAC5573,
+ DAC6573, DAC7573, DAC8571, DAC8574.
+
+ If compiled as a module, it will be called ti-dac5571.
+
config VF610_DAC
tristate "Vybrid vf610 DAC driver"
depends on OF
diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index 81e710ed7491..57aa230d34ab 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -20,6 +20,8 @@ obj-$(CONFIG_AD5761) += ad5761.o
obj-$(CONFIG_AD5764) += ad5764.o
obj-$(CONFIG_AD5791) += ad5791.o
obj-$(CONFIG_AD5686) += ad5686.o
+obj-$(CONFIG_AD5686_SPI) += ad5686-spi.o
+obj-$(CONFIG_AD5696_I2C) += ad5696-i2c.o
obj-$(CONFIG_AD7303) += ad7303.o
obj-$(CONFIG_AD8801) += ad8801.o
obj-$(CONFIG_CIO_DAC) += cio-dac.o
@@ -35,4 +37,5 @@ obj-$(CONFIG_MCP4922) += mcp4922.o
obj-$(CONFIG_STM32_DAC_CORE) += stm32-dac-core.o
obj-$(CONFIG_STM32_DAC) += stm32-dac.o
obj-$(CONFIG_TI_DAC082S085) += ti-dac082s085.o
+obj-$(CONFIG_TI_DAC5571) += ti-dac5571.o
obj-$(CONFIG_VF610_DAC) += vf610_dac.o
diff --git a/drivers/iio/dac/ad5686-spi.c b/drivers/iio/dac/ad5686-spi.c
new file mode 100644
index 000000000000..1df9143f55e9
--- /dev/null
+++ b/drivers/iio/dac/ad5686-spi.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AD5672R, AD5676, AD5676R, AD5681R, AD5682R, AD5683, AD5683R,
+ * AD5684, AD5684R, AD5685R, AD5686, AD5686R
+ * Digital to analog converters driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include "ad5686.h"
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+
+static int ad5686_spi_write(struct ad5686_state *st,
+ u8 cmd, u8 addr, u16 val)
+{
+ struct spi_device *spi = to_spi_device(st->dev);
+ u8 tx_len, *buf;
+
+ switch (st->chip_info->regmap_type) {
+ case AD5683_REGMAP:
+ st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
+ AD5683_DATA(val));
+ buf = &st->data[0].d8[1];
+ tx_len = 3;
+ break;
+ case AD5686_REGMAP:
+ st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
+ AD5686_ADDR(addr) |
+ val);
+ buf = &st->data[0].d8[1];
+ tx_len = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return spi_write(spi, buf, tx_len);
+}
+
+static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
+{
+ struct spi_transfer t[] = {
+ {
+ .tx_buf = &st->data[0].d8[1],
+ .len = 3,
+ .cs_change = 1,
+ }, {
+ .tx_buf = &st->data[1].d8[1],
+ .rx_buf = &st->data[2].d8[1],
+ .len = 3,
+ },
+ };
+ struct spi_device *spi = to_spi_device(st->dev);
+ u8 cmd = 0;
+ int ret;
+
+ if (st->chip_info->regmap_type == AD5686_REGMAP)
+ cmd = AD5686_CMD_READBACK_ENABLE;
+ else if (st->chip_info->regmap_type == AD5683_REGMAP)
+ cmd = AD5686_CMD_READBACK_ENABLE_V2;
+
+ st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
+ AD5686_ADDR(addr));
+ st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
+
+ ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));
+ if (ret < 0)
+ return ret;
+
+ return be32_to_cpu(st->data[2].d32);
+}
+
+static int ad5686_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+
+ return ad5686_probe(&spi->dev, id->driver_data, id->name,
+ ad5686_spi_write, ad5686_spi_read);
+}
+
+static int ad5686_spi_remove(struct spi_device *spi)
+{
+ return ad5686_remove(&spi->dev);
+}
+
+static const struct spi_device_id ad5686_spi_id[] = {
+ {"ad5672r", ID_AD5672R},
+ {"ad5676", ID_AD5676},
+ {"ad5676r", ID_AD5676R},
+ {"ad5681r", ID_AD5681R},
+ {"ad5682r", ID_AD5682R},
+ {"ad5683", ID_AD5683},
+ {"ad5683r", ID_AD5683R},
+ {"ad5684", ID_AD5684},
+ {"ad5684r", ID_AD5684R},
+ {"ad5685", ID_AD5685R}, /* Does not exist */
+ {"ad5685r", ID_AD5685R},
+ {"ad5686", ID_AD5686},
+ {"ad5686r", ID_AD5686R},
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad5686_spi_id);
+
+static struct spi_driver ad5686_spi_driver = {
+ .driver = {
+ .name = "ad5686",
+ },
+ .probe = ad5686_spi_probe,
+ .remove = ad5686_spi_remove,
+ .id_table = ad5686_spi_id,
+};
+
+module_spi_driver(ad5686_spi_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index 20254df7f9c7..e136f0fd38f0 100644
--- a/drivers/iio/dac/ad5686.c
+++ b/drivers/iio/dac/ad5686.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* AD5686R, AD5685R, AD5684R Digital to analog converters driver
*
* Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
*/
#include <linux/interrupt.h>
@@ -11,7 +10,6 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/kernel.h>
-#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/regulator/consumer.h>
@@ -19,116 +17,7 @@
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
-#define AD5686_DAC_CHANNELS 4
-
-#define AD5686_ADDR(x) ((x) << 16)
-#define AD5686_CMD(x) ((x) << 20)
-
-#define AD5686_ADDR_DAC(chan) (0x1 << (chan))
-#define AD5686_ADDR_ALL_DAC 0xF
-
-#define AD5686_CMD_NOOP 0x0
-#define AD5686_CMD_WRITE_INPUT_N 0x1
-#define AD5686_CMD_UPDATE_DAC_N 0x2
-#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3
-#define AD5686_CMD_POWERDOWN_DAC 0x4
-#define AD5686_CMD_LDAC_MASK 0x5
-#define AD5686_CMD_RESET 0x6
-#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7
-#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8
-#define AD5686_CMD_READBACK_ENABLE 0x9
-
-#define AD5686_LDAC_PWRDN_NONE 0x0
-#define AD5686_LDAC_PWRDN_1K 0x1
-#define AD5686_LDAC_PWRDN_100K 0x2
-#define AD5686_LDAC_PWRDN_3STATE 0x3
-
-/**
- * struct ad5686_chip_info - chip specific information
- * @int_vref_mv: AD5620/40/60: the internal reference voltage
- * @channel: channel specification
-*/
-
-struct ad5686_chip_info {
- u16 int_vref_mv;
- struct iio_chan_spec channel[AD5686_DAC_CHANNELS];
-};
-
-/**
- * struct ad5446_state - driver instance specific data
- * @spi: spi_device
- * @chip_info: chip model specific constants, available modes etc
- * @reg: supply regulator
- * @vref_mv: actual reference voltage used
- * @pwr_down_mask: power down mask
- * @pwr_down_mode: current power down mode
- * @data: spi transfer buffers
- */
-
-struct ad5686_state {
- struct spi_device *spi;
- const struct ad5686_chip_info *chip_info;
- struct regulator *reg;
- unsigned short vref_mv;
- unsigned pwr_down_mask;
- unsigned pwr_down_mode;
- /*
- * DMA (thus cache coherency maintenance) requires the
- * transfer buffers to live in their own cache lines.
- */
-
- union {
- __be32 d32;
- u8 d8[4];
- } data[3] ____cacheline_aligned;
-};
-
-/**
- * ad5686_supported_device_ids:
- */
-
-enum ad5686_supported_device_ids {
- ID_AD5684,
- ID_AD5685,
- ID_AD5686,
-};
-static int ad5686_spi_write(struct ad5686_state *st,
- u8 cmd, u8 addr, u16 val, u8 shift)
-{
- val <<= shift;
-
- st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
- AD5686_ADDR(addr) |
- val);
-
- return spi_write(st->spi, &st->data[0].d8[1], 3);
-}
-
-static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
-{
- struct spi_transfer t[] = {
- {
- .tx_buf = &st->data[0].d8[1],
- .len = 3,
- .cs_change = 1,
- }, {
- .tx_buf = &st->data[1].d8[1],
- .rx_buf = &st->data[2].d8[1],
- .len = 3,
- },
- };
- int ret;
-
- st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_READBACK_ENABLE) |
- AD5686_ADDR(addr));
- st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
-
- ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));
- if (ret < 0)
- return ret;
-
- return be32_to_cpu(st->data[2].d32);
-}
+#include "ad5686.h"
static const char * const ad5686_powerdown_modes[] = {
"1kohm_to_gnd",
@@ -137,7 +26,7 @@ static const char * const ad5686_powerdown_modes[] = {
};
static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan)
+ const struct iio_chan_spec *chan)
{
struct ad5686_state *st = iio_priv(indio_dev);
@@ -145,7 +34,8 @@ static int ad5686_get_powerdown_mode(struct iio_dev *indio_dev,
}
static int ad5686_set_powerdown_mode(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan, unsigned int mode)
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
{
struct ad5686_state *st = iio_priv(indio_dev);
@@ -163,21 +53,25 @@ static const struct iio_enum ad5686_powerdown_mode_enum = {
};
static ssize_t ad5686_read_dac_powerdown(struct iio_dev *indio_dev,
- uintptr_t private, const struct iio_chan_spec *chan, char *buf)
+ uintptr_t private, const struct iio_chan_spec *chan, char *buf)
{
struct ad5686_state *st = iio_priv(indio_dev);
return sprintf(buf, "%d\n", !!(st->pwr_down_mask &
- (0x3 << (chan->channel * 2))));
+ (0x3 << (chan->channel * 2))));
}
static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev,
- uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
- size_t len)
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf,
+ size_t len)
{
bool readin;
int ret;
struct ad5686_state *st = iio_priv(indio_dev);
+ unsigned int val, ref_bit_msk;
+ u8 shift;
ret = strtobool(buf, &readin);
if (ret)
@@ -188,8 +82,28 @@ static ssize_t ad5686_write_dac_powerdown(struct iio_dev *indio_dev,
else
st->pwr_down_mask &= ~(0x3 << (chan->channel * 2));
- ret = ad5686_spi_write(st, AD5686_CMD_POWERDOWN_DAC, 0,
- st->pwr_down_mask & st->pwr_down_mode, 0);
+ switch (st->chip_info->regmap_type) {
+ case AD5683_REGMAP:
+ shift = 13;
+ ref_bit_msk = AD5683_REF_BIT_MSK;
+ break;
+ case AD5686_REGMAP:
+ shift = 0;
+ ref_bit_msk = 0;
+ break;
+ case AD5693_REGMAP:
+ shift = 13;
+ ref_bit_msk = AD5693_REF_BIT_MSK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ val = ((st->pwr_down_mask & st->pwr_down_mode) << shift);
+ if (!st->use_internal_vref)
+ val |= ref_bit_msk;
+
+ ret = st->write(st, AD5686_CMD_POWERDOWN_DAC, 0, val);
return ret ? ret : len;
}
@@ -206,7 +120,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
switch (m) {
case IIO_CHAN_INFO_RAW:
mutex_lock(&indio_dev->mlock);
- ret = ad5686_spi_read(st, chan->address);
+ ret = st->read(st, chan->address);
mutex_unlock(&indio_dev->mlock);
if (ret < 0)
return ret;
@@ -221,10 +135,10 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
}
static int ad5686_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val,
- int val2,
- long mask)
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
{
struct ad5686_state *st = iio_priv(indio_dev);
int ret;
@@ -235,11 +149,10 @@ static int ad5686_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
mutex_lock(&indio_dev->mlock);
- ret = ad5686_spi_write(st,
- AD5686_CMD_WRITE_INPUT_N_UPDATE_N,
- chan->address,
- val,
- chan->scan_type.shift);
+ ret = st->write(st,
+ AD5686_CMD_WRITE_INPUT_N_UPDATE_N,
+ chan->address,
+ val << chan->scan_type.shift);
mutex_unlock(&indio_dev->mlock);
break;
default:
@@ -266,14 +179,14 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
{ },
};
-#define AD5868_CHANNEL(chan, bits, _shift) { \
+#define AD5868_CHANNEL(chan, addr, bits, _shift) { \
.type = IIO_VOLTAGE, \
.indexed = 1, \
.output = 1, \
.channel = chan, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\
- .address = AD5686_ADDR_DAC(chan), \
+ .address = addr, \
.scan_type = { \
.sign = 'u', \
.realbits = (bits), \
@@ -283,45 +196,191 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
.ext_info = ad5686_ext_info, \
}
+#define DECLARE_AD5693_CHANNELS(name, bits, _shift) \
+static struct iio_chan_spec name[] = { \
+ AD5868_CHANNEL(0, 0, bits, _shift), \
+}
+
+#define DECLARE_AD5686_CHANNELS(name, bits, _shift) \
+static struct iio_chan_spec name[] = { \
+ AD5868_CHANNEL(0, 1, bits, _shift), \
+ AD5868_CHANNEL(1, 2, bits, _shift), \
+ AD5868_CHANNEL(2, 4, bits, _shift), \
+ AD5868_CHANNEL(3, 8, bits, _shift), \
+}
+
+#define DECLARE_AD5676_CHANNELS(name, bits, _shift) \
+static struct iio_chan_spec name[] = { \
+ AD5868_CHANNEL(0, 0, bits, _shift), \
+ AD5868_CHANNEL(1, 1, bits, _shift), \
+ AD5868_CHANNEL(2, 2, bits, _shift), \
+ AD5868_CHANNEL(3, 3, bits, _shift), \
+ AD5868_CHANNEL(4, 4, bits, _shift), \
+ AD5868_CHANNEL(5, 5, bits, _shift), \
+ AD5868_CHANNEL(6, 6, bits, _shift), \
+ AD5868_CHANNEL(7, 7, bits, _shift), \
+}
+
+DECLARE_AD5676_CHANNELS(ad5672_channels, 12, 4);
+DECLARE_AD5676_CHANNELS(ad5676_channels, 16, 0);
+DECLARE_AD5686_CHANNELS(ad5684_channels, 12, 4);
+DECLARE_AD5686_CHANNELS(ad5685r_channels, 14, 2);
+DECLARE_AD5686_CHANNELS(ad5686_channels, 16, 0);
+DECLARE_AD5693_CHANNELS(ad5693_channels, 16, 0);
+DECLARE_AD5693_CHANNELS(ad5692r_channels, 14, 2);
+DECLARE_AD5693_CHANNELS(ad5691r_channels, 12, 4);
+
static const struct ad5686_chip_info ad5686_chip_info_tbl[] = {
+ [ID_AD5671R] = {
+ .channels = ad5672_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 8,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5672R] = {
+ .channels = ad5672_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 8,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5675R] = {
+ .channels = ad5676_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 8,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5676] = {
+ .channels = ad5676_channels,
+ .num_channels = 8,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5676R] = {
+ .channels = ad5676_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 8,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5681R] = {
+ .channels = ad5691r_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5683_REGMAP,
+ },
+ [ID_AD5682R] = {
+ .channels = ad5692r_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5683_REGMAP,
+ },
+ [ID_AD5683] = {
+ .channels = ad5693_channels,
+ .num_channels = 1,
+ .regmap_type = AD5683_REGMAP,
+ },
+ [ID_AD5683R] = {
+ .channels = ad5693_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5683_REGMAP,
+ },
[ID_AD5684] = {
- .channel[0] = AD5868_CHANNEL(0, 12, 4),
- .channel[1] = AD5868_CHANNEL(1, 12, 4),
- .channel[2] = AD5868_CHANNEL(2, 12, 4),
- .channel[3] = AD5868_CHANNEL(3, 12, 4),
+ .channels = ad5684_channels,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5684R] = {
+ .channels = ad5684_channels,
.int_vref_mv = 2500,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
},
- [ID_AD5685] = {
- .channel[0] = AD5868_CHANNEL(0, 14, 2),
- .channel[1] = AD5868_CHANNEL(1, 14, 2),
- .channel[2] = AD5868_CHANNEL(2, 14, 2),
- .channel[3] = AD5868_CHANNEL(3, 14, 2),
+ [ID_AD5685R] = {
+ .channels = ad5685r_channels,
.int_vref_mv = 2500,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
},
[ID_AD5686] = {
- .channel[0] = AD5868_CHANNEL(0, 16, 0),
- .channel[1] = AD5868_CHANNEL(1, 16, 0),
- .channel[2] = AD5868_CHANNEL(2, 16, 0),
- .channel[3] = AD5868_CHANNEL(3, 16, 0),
+ .channels = ad5686_channels,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5686R] = {
+ .channels = ad5686_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5691R] = {
+ .channels = ad5691r_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5693_REGMAP,
+ },
+ [ID_AD5692R] = {
+ .channels = ad5692r_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5693_REGMAP,
+ },
+ [ID_AD5693] = {
+ .channels = ad5693_channels,
+ .num_channels = 1,
+ .regmap_type = AD5693_REGMAP,
+ },
+ [ID_AD5693R] = {
+ .channels = ad5693_channels,
.int_vref_mv = 2500,
+ .num_channels = 1,
+ .regmap_type = AD5693_REGMAP,
+ },
+ [ID_AD5694] = {
+ .channels = ad5684_channels,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5694R] = {
+ .channels = ad5684_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5696] = {
+ .channels = ad5686_channels,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
+ },
+ [ID_AD5696R] = {
+ .channels = ad5686_channels,
+ .int_vref_mv = 2500,
+ .num_channels = 4,
+ .regmap_type = AD5686_REGMAP,
},
};
-
-static int ad5686_probe(struct spi_device *spi)
+int ad5686_probe(struct device *dev,
+ enum ad5686_supported_device_ids chip_type,
+ const char *name, ad5686_write_func write,
+ ad5686_read_func read)
{
struct ad5686_state *st;
struct iio_dev *indio_dev;
- int ret, voltage_uv = 0;
+ unsigned int val, ref_bit_msk;
+ u8 cmd;
+ int ret, i, voltage_uv = 0;
- indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
if (indio_dev == NULL)
return -ENOMEM;
st = iio_priv(indio_dev);
- spi_set_drvdata(spi, indio_dev);
+ dev_set_drvdata(dev, indio_dev);
+
+ st->dev = dev;
+ st->write = write;
+ st->read = read;
- st->reg = devm_regulator_get_optional(&spi->dev, "vcc");
+ st->reg = devm_regulator_get_optional(dev, "vcc");
if (!IS_ERR(st->reg)) {
ret = regulator_enable(st->reg);
if (ret)
@@ -334,28 +393,47 @@ static int ad5686_probe(struct spi_device *spi)
voltage_uv = ret;
}
- st->chip_info =
- &ad5686_chip_info_tbl[spi_get_device_id(spi)->driver_data];
+ st->chip_info = &ad5686_chip_info_tbl[chip_type];
if (voltage_uv)
st->vref_mv = voltage_uv / 1000;
else
st->vref_mv = st->chip_info->int_vref_mv;
- st->spi = spi;
-
/* Set all the power down mode for all channels to 1K pulldown */
- st->pwr_down_mode = 0x55;
+ for (i = 0; i < st->chip_info->num_channels; i++)
+ st->pwr_down_mode |= (0x01 << (i * 2));
- indio_dev->dev.parent = &spi->dev;
- indio_dev->name = spi_get_device_id(spi)->name;
+ indio_dev->dev.parent = dev;
+ indio_dev->name = name;
indio_dev->info = &ad5686_info;
indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->channels = st->chip_info->channel;
- indio_dev->num_channels = AD5686_DAC_CHANNELS;
+ indio_dev->channels = st->chip_info->channels;
+ indio_dev->num_channels = st->chip_info->num_channels;
+
+ switch (st->chip_info->regmap_type) {
+ case AD5683_REGMAP:
+ cmd = AD5686_CMD_CONTROL_REG;
+ ref_bit_msk = AD5683_REF_BIT_MSK;
+ st->use_internal_vref = !voltage_uv;
+ break;
+ case AD5686_REGMAP:
+ cmd = AD5686_CMD_INTERNAL_REFER_SETUP;
+ ref_bit_msk = 0;
+ break;
+ case AD5693_REGMAP:
+ cmd = AD5686_CMD_CONTROL_REG;
+ ref_bit_msk = AD5693_REF_BIT_MSK;
+ st->use_internal_vref = !voltage_uv;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_disable_reg;
+ }
+
+ val = (voltage_uv | ref_bit_msk);
- ret = ad5686_spi_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0,
- !!voltage_uv, 0);
+ ret = st->write(st, cmd, 0, !!val);
if (ret)
goto error_disable_reg;
@@ -370,10 +448,11 @@ error_disable_reg:
regulator_disable(st->reg);
return ret;
}
+EXPORT_SYMBOL_GPL(ad5686_probe);
-static int ad5686_remove(struct spi_device *spi)
+int ad5686_remove(struct device *dev)
{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct ad5686_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
@@ -382,24 +461,7 @@ static int ad5686_remove(struct spi_device *spi)
return 0;
}
-
-static const struct spi_device_id ad5686_id[] = {
- {"ad5684", ID_AD5684},
- {"ad5685", ID_AD5685},
- {"ad5686", ID_AD5686},
- {}
-};
-MODULE_DEVICE_TABLE(spi, ad5686_id);
-
-static struct spi_driver ad5686_driver = {
- .driver = {
- .name = "ad5686",
- },
- .probe = ad5686_probe,
- .remove = ad5686_remove,
- .id_table = ad5686_id,
-};
-module_spi_driver(ad5686_driver);
+EXPORT_SYMBOL_GPL(ad5686_remove);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD5686/85/84 DAC");
diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h
new file mode 100644
index 000000000000..d05cda9f1edd
--- /dev/null
+++ b/drivers/iio/dac/ad5686.h
@@ -0,0 +1,145 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * This file is part of AD5686 DAC driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#ifndef __DRIVERS_IIO_DAC_AD5686_H__
+#define __DRIVERS_IIO_DAC_AD5686_H__
+
+#include <linux/types.h>
+#include <linux/cache.h>
+#include <linux/mutex.h>
+#include <linux/kernel.h>
+
+#define AD5683_DATA(x) ((x) << 4)
+#define AD5686_ADDR(x) ((x) << 16)
+#define AD5686_CMD(x) ((x) << 20)
+
+#define AD5686_ADDR_DAC(chan) (0x1 << (chan))
+#define AD5686_ADDR_ALL_DAC 0xF
+
+#define AD5686_CMD_NOOP 0x0
+#define AD5686_CMD_WRITE_INPUT_N 0x1
+#define AD5686_CMD_UPDATE_DAC_N 0x2
+#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3
+#define AD5686_CMD_POWERDOWN_DAC 0x4
+#define AD5686_CMD_LDAC_MASK 0x5
+#define AD5686_CMD_RESET 0x6
+#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7
+#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8
+#define AD5686_CMD_READBACK_ENABLE 0x9
+
+#define AD5686_LDAC_PWRDN_NONE 0x0
+#define AD5686_LDAC_PWRDN_1K 0x1
+#define AD5686_LDAC_PWRDN_100K 0x2
+#define AD5686_LDAC_PWRDN_3STATE 0x3
+
+#define AD5686_CMD_CONTROL_REG 0x4
+#define AD5686_CMD_READBACK_ENABLE_V2 0x5
+#define AD5683_REF_BIT_MSK BIT(12)
+#define AD5693_REF_BIT_MSK BIT(12)
+
+/**
+ * ad5686_supported_device_ids:
+ */
+enum ad5686_supported_device_ids {
+ ID_AD5671R,
+ ID_AD5672R,
+ ID_AD5675R,
+ ID_AD5676,
+ ID_AD5676R,
+ ID_AD5681R,
+ ID_AD5682R,
+ ID_AD5683,
+ ID_AD5683R,
+ ID_AD5684,
+ ID_AD5684R,
+ ID_AD5685R,
+ ID_AD5686,
+ ID_AD5686R,
+ ID_AD5691R,
+ ID_AD5692R,
+ ID_AD5693,
+ ID_AD5693R,
+ ID_AD5694,
+ ID_AD5694R,
+ ID_AD5695R,
+ ID_AD5696,
+ ID_AD5696R,
+};
+
+enum ad5686_regmap_type {
+ AD5683_REGMAP,
+ AD5686_REGMAP,
+ AD5693_REGMAP
+};
+
+struct ad5686_state;
+
+typedef int (*ad5686_write_func)(struct ad5686_state *st,
+ u8 cmd, u8 addr, u16 val);
+
+typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr);
+
+/**
+ * struct ad5686_chip_info - chip specific information
+ * @int_vref_mv: AD5620/40/60: the internal reference voltage
+ * @num_channels: number of channels
+ * @channel: channel specification
+ * @regmap_type: register map layout variant
+ */
+
+struct ad5686_chip_info {
+ u16 int_vref_mv;
+ unsigned int num_channels;
+ struct iio_chan_spec *channels;
+ enum ad5686_regmap_type regmap_type;
+};
+
+/**
+ * struct ad5446_state - driver instance specific data
+ * @spi: spi_device
+ * @chip_info: chip model specific constants, available modes etc
+ * @reg: supply regulator
+ * @vref_mv: actual reference voltage used
+ * @pwr_down_mask: power down mask
+ * @pwr_down_mode: current power down mode
+ * @use_internal_vref: set to true if the internal reference voltage is used
+ * @data: spi transfer buffers
+ */
+
+struct ad5686_state {
+ struct device *dev;
+ const struct ad5686_chip_info *chip_info;
+ struct regulator *reg;
+ unsigned short vref_mv;
+ unsigned int pwr_down_mask;
+ unsigned int pwr_down_mode;
+ ad5686_write_func write;
+ ad5686_read_func read;
+ bool use_internal_vref;
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+
+ union {
+ __be32 d32;
+ __be16 d16;
+ u8 d8[4];
+ } data[3] ____cacheline_aligned;
+};
+
+
+int ad5686_probe(struct device *dev,
+ enum ad5686_supported_device_ids chip_type,
+ const char *name, ad5686_write_func write,
+ ad5686_read_func read);
+
+int ad5686_remove(struct device *dev);
+
+
+#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */
diff --git a/drivers/iio/dac/ad5696-i2c.c b/drivers/iio/dac/ad5696-i2c.c
new file mode 100644
index 000000000000..d18735d7d938
--- /dev/null
+++ b/drivers/iio/dac/ad5696-i2c.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R,
+ * AD5694, AD5694R, AD5695R, AD5696, AD5696R
+ * Digital to analog converters driver
+ *
+ * Copyright 2018 Analog Devices Inc.
+ */
+
+#include "ad5686.h"
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+
+static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+ struct i2c_msg msg[2] = {
+ {
+ .addr = i2c->addr,
+ .flags = i2c->flags,
+ .len = 3,
+ .buf = &st->data[0].d8[1],
+ },
+ {
+ .addr = i2c->addr,
+ .flags = i2c->flags | I2C_M_RD,
+ .len = 2,
+ .buf = (char *)&st->data[0].d16,
+ },
+ };
+ int ret;
+
+ st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
+ AD5686_ADDR(addr) |
+ 0x00);
+
+ ret = i2c_transfer(i2c->adapter, msg, 2);
+ if (ret < 0)
+ return ret;
+
+ return be16_to_cpu(st->data[0].d16);
+}
+
+static int ad5686_i2c_write(struct ad5686_state *st,
+ u8 cmd, u8 addr, u16 val)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+ int ret;
+
+ st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
+ | val);
+
+ ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
+ if (ret < 0)
+ return ret;
+
+ return (ret != 3) ? -EIO : 0;
+}
+
+static int ad5686_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ return ad5686_probe(&i2c->dev, id->driver_data, id->name,
+ ad5686_i2c_write, ad5686_i2c_read);
+}
+
+static int ad5686_i2c_remove(struct i2c_client *i2c)
+{
+ return ad5686_remove(&i2c->dev);
+}
+
+static const struct i2c_device_id ad5686_i2c_id[] = {
+ {"ad5671r", ID_AD5671R},
+ {"ad5675r", ID_AD5675R},
+ {"ad5691r", ID_AD5691R},
+ {"ad5692r", ID_AD5692R},
+ {"ad5693", ID_AD5693},
+ {"ad5693r", ID_AD5693R},
+ {"ad5694", ID_AD5694},
+ {"ad5694r", ID_AD5694R},
+ {"ad5695r", ID_AD5695R},
+ {"ad5696", ID_AD5696},
+ {"ad5696r", ID_AD5696R},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
+
+static struct i2c_driver ad5686_i2c_driver = {
+ .driver = {
+ .name = "ad5696",
+ },
+ .probe = ad5686_i2c_probe,
+ .remove = ad5686_i2c_remove,
+ .id_table = ad5686_i2c_id,
+};
+
+module_i2c_driver(ad5686_i2c_driver);
+
+MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ltc2632.c b/drivers/iio/dac/ltc2632.c
index af2ddd0dd341..cca278eaa138 100644
--- a/drivers/iio/dac/ltc2632.c
+++ b/drivers/iio/dac/ltc2632.c
@@ -2,6 +2,7 @@
* LTC2632 Digital to analog convertors spi driver
*
* Copyright 2017 Maxime Roussin-Bélanger
+ * expanded by Silvan Murer <silvan.murer@gmail.com>
*
* Licensed under the GPL-2.
*/
@@ -10,6 +11,7 @@
#include <linux/spi/spi.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
+#include <linux/regulator/consumer.h>
#define LTC2632_DAC_CHANNELS 2
@@ -28,7 +30,7 @@
/**
* struct ltc2632_chip_info - chip specific information
* @channels: channel spec for the DAC
- * @vref_mv: reference voltage
+ * @vref_mv: internal reference voltage
*/
struct ltc2632_chip_info {
const struct iio_chan_spec *channels;
@@ -39,10 +41,14 @@ struct ltc2632_chip_info {
* struct ltc2632_state - driver instance specific data
* @spi_dev: pointer to the spi_device struct
* @powerdown_cache_mask used to show current channel powerdown state
+ * @vref_mv used reference voltage (internal or external)
+ * @vref_reg regulator for the reference voltage
*/
struct ltc2632_state {
struct spi_device *spi_dev;
unsigned int powerdown_cache_mask;
+ int vref_mv;
+ struct regulator *vref_reg;
};
enum ltc2632_supported_device_ids {
@@ -90,7 +96,7 @@ static int ltc2632_read_raw(struct iio_dev *indio_dev,
switch (m) {
case IIO_CHAN_INFO_SCALE:
- *val = chip_info->vref_mv;
+ *val = st->vref_mv;
*val2 = chan->scan_type.realbits;
return IIO_VAL_FRACTIONAL_LOG2;
}
@@ -246,6 +252,45 @@ static int ltc2632_probe(struct spi_device *spi)
chip_info = (struct ltc2632_chip_info *)
spi_get_device_id(spi)->driver_data;
+ st->vref_reg = devm_regulator_get_optional(&spi->dev, "vref");
+ if (PTR_ERR(st->vref_reg) == -ENODEV) {
+ /* use internal reference voltage */
+ st->vref_reg = NULL;
+ st->vref_mv = chip_info->vref_mv;
+
+ ret = ltc2632_spi_write(spi, LTC2632_CMD_INTERNAL_REFER,
+ 0, 0, 0);
+ if (ret) {
+ dev_err(&spi->dev,
+ "Set internal reference command failed, %d\n",
+ ret);
+ return ret;
+ }
+ } else if (IS_ERR(st->vref_reg)) {
+ dev_err(&spi->dev,
+ "Error getting voltage reference regulator\n");
+ return PTR_ERR(st->vref_reg);
+ } else {
+ /* use external reference voltage */
+ ret = regulator_enable(st->vref_reg);
+ if (ret) {
+ dev_err(&spi->dev,
+ "enable reference regulator failed, %d\n",
+ ret);
+ return ret;
+ }
+ st->vref_mv = regulator_get_voltage(st->vref_reg) / 1000;
+
+ ret = ltc2632_spi_write(spi, LTC2632_CMD_EXTERNAL_REFER,
+ 0, 0, 0);
+ if (ret) {
+ dev_err(&spi->dev,
+ "Set external reference command failed, %d\n",
+ ret);
+ return ret;
+ }
+ }
+
indio_dev->dev.parent = &spi->dev;
indio_dev->name = dev_of_node(&spi->dev) ? dev_of_node(&spi->dev)->name
: spi_get_device_id(spi)->name;
@@ -254,14 +299,20 @@ static int ltc2632_probe(struct spi_device *spi)
indio_dev->channels = chip_info->channels;
indio_dev->num_channels = LTC2632_DAC_CHANNELS;
- ret = ltc2632_spi_write(spi, LTC2632_CMD_INTERNAL_REFER, 0, 0, 0);
- if (ret) {
- dev_err(&spi->dev,
- "Set internal reference command failed, %d\n", ret);
- return ret;
- }
+ return iio_device_register(indio_dev);
+}
- return devm_iio_device_register(&spi->dev, indio_dev);
+static int ltc2632_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct ltc2632_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ if (st->vref_reg)
+ regulator_disable(st->vref_reg);
+
+ return 0;
}
static const struct spi_device_id ltc2632_id[] = {
@@ -275,15 +326,6 @@ static const struct spi_device_id ltc2632_id[] = {
};
MODULE_DEVICE_TABLE(spi, ltc2632_id);
-static struct spi_driver ltc2632_driver = {
- .driver = {
- .name = "ltc2632",
- },
- .probe = ltc2632_probe,
- .id_table = ltc2632_id,
-};
-module_spi_driver(ltc2632_driver);
-
static const struct of_device_id ltc2632_of_match[] = {
{
.compatible = "lltc,ltc2632-l12",
@@ -308,6 +350,17 @@ static const struct of_device_id ltc2632_of_match[] = {
};
MODULE_DEVICE_TABLE(of, ltc2632_of_match);
+static struct spi_driver ltc2632_driver = {
+ .driver = {
+ .name = "ltc2632",
+ .of_match_table = of_match_ptr(ltc2632_of_match),
+ },
+ .probe = ltc2632_probe,
+ .remove = ltc2632_remove,
+ .id_table = ltc2632_id,
+};
+module_spi_driver(ltc2632_driver);
+
MODULE_AUTHOR("Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>");
MODULE_DESCRIPTION("LTC2632 DAC SPI driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ti-dac5571.c b/drivers/iio/dac/ti-dac5571.c
new file mode 100644
index 000000000000..dd21eebed6a8
--- /dev/null
+++ b/drivers/iio/dac/ti-dac5571.c
@@ -0,0 +1,439 @@
+/*
+ * ti-dac5571.c - Texas Instruments 8/10/12-bit 1/4-channel DAC driver
+ *
+ * Copyright (C) 2018 Prevas A/S
+ *
+ * http://www.ti.com/lit/ds/symlink/dac5571.pdf
+ * http://www.ti.com/lit/ds/symlink/dac6571.pdf
+ * http://www.ti.com/lit/ds/symlink/dac7571.pdf
+ * http://www.ti.com/lit/ds/symlink/dac5574.pdf
+ * http://www.ti.com/lit/ds/symlink/dac6574.pdf
+ * http://www.ti.com/lit/ds/symlink/dac7574.pdf
+ * http://www.ti.com/lit/ds/symlink/dac5573.pdf
+ * http://www.ti.com/lit/ds/symlink/dac6573.pdf
+ * http://www.ti.com/lit/ds/symlink/dac7573.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/iio/iio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+enum chip_id {
+ single_8bit, single_10bit, single_12bit,
+ quad_8bit, quad_10bit, quad_12bit
+};
+
+struct dac5571_spec {
+ u8 num_channels;
+ u8 resolution;
+};
+
+static const struct dac5571_spec dac5571_spec[] = {
+ [single_8bit] = {.num_channels = 1, .resolution = 8},
+ [single_10bit] = {.num_channels = 1, .resolution = 10},
+ [single_12bit] = {.num_channels = 1, .resolution = 12},
+ [quad_8bit] = {.num_channels = 4, .resolution = 8},
+ [quad_10bit] = {.num_channels = 4, .resolution = 10},
+ [quad_12bit] = {.num_channels = 4, .resolution = 12},
+};
+
+struct dac5571_data {
+ struct i2c_client *client;
+ int id;
+ struct mutex lock;
+ struct regulator *vref;
+ u16 val[4];
+ bool powerdown;
+ u8 powerdown_mode;
+ struct dac5571_spec const *spec;
+ int (*dac5571_cmd)(struct dac5571_data *data, int channel, u16 val);
+ int (*dac5571_pwrdwn)(struct dac5571_data *data, int channel, u8 pwrdwn);
+ u8 buf[3] ____cacheline_aligned;
+};
+
+#define DAC5571_POWERDOWN(mode) ((mode) + 1)
+#define DAC5571_POWERDOWN_FLAG BIT(0)
+#define DAC5571_CHANNEL_SELECT 1
+#define DAC5571_LOADMODE_DIRECT BIT(4)
+#define DAC5571_SINGLE_PWRDWN_BITS 4
+#define DAC5571_QUAD_PWRDWN_BITS 6
+
+static int dac5571_cmd_single(struct dac5571_data *data, int channel, u16 val)
+{
+ unsigned int shift;
+
+ shift = 12 - data->spec->resolution;
+ data->buf[1] = val << shift;
+ data->buf[0] = val >> (8 - shift);
+
+ if (i2c_master_send(data->client, data->buf, 2) != 2)
+ return -EIO;
+
+ return 0;
+}
+
+static int dac5571_cmd_quad(struct dac5571_data *data, int channel, u16 val)
+{
+ unsigned int shift;
+
+ shift = 16 - data->spec->resolution;
+ data->buf[2] = val << shift;
+ data->buf[1] = (val >> (8 - shift));
+ data->buf[0] = (channel << DAC5571_CHANNEL_SELECT) |
+ DAC5571_LOADMODE_DIRECT;
+
+ if (i2c_master_send(data->client, data->buf, 3) != 3)
+ return -EIO;
+
+ return 0;
+}
+
+static int dac5571_pwrdwn_single(struct dac5571_data *data, int channel, u8 pwrdwn)
+{
+ unsigned int shift;
+
+ shift = 12 - data->spec->resolution;
+ data->buf[1] = 0;
+ data->buf[0] = pwrdwn << DAC5571_SINGLE_PWRDWN_BITS;
+
+ if (i2c_master_send(data->client, data->buf, 2) != 2)
+ return -EIO;
+
+ return 0;
+}
+
+static int dac5571_pwrdwn_quad(struct dac5571_data *data, int channel, u8 pwrdwn)
+{
+ unsigned int shift;
+
+ shift = 16 - data->spec->resolution;
+ data->buf[2] = 0;
+ data->buf[1] = pwrdwn << DAC5571_QUAD_PWRDWN_BITS;
+ data->buf[0] = (channel << DAC5571_CHANNEL_SELECT) |
+ DAC5571_LOADMODE_DIRECT | DAC5571_POWERDOWN_FLAG;
+
+ if (i2c_master_send(data->client, data->buf, 3) != 3)
+ return -EIO;
+
+ return 0;
+}
+
+static const char *const dac5571_powerdown_modes[] = {
+ "1kohm_to_gnd", "100kohm_to_gnd", "three_state",
+};
+
+static int dac5571_get_powerdown_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+
+ return data->powerdown_mode;
+}
+
+static int dac5571_set_powerdown_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+ int ret = 0;
+
+ if (data->powerdown_mode == mode)
+ return 0;
+
+ mutex_lock(&data->lock);
+ if (data->powerdown) {
+ ret = data->dac5571_pwrdwn(data, chan->channel,
+ DAC5571_POWERDOWN(mode));
+ if (ret)
+ goto out;
+ }
+ data->powerdown_mode = mode;
+
+ out:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static const struct iio_enum dac5571_powerdown_mode = {
+ .items = dac5571_powerdown_modes,
+ .num_items = ARRAY_SIZE(dac5571_powerdown_modes),
+ .get = dac5571_get_powerdown_mode,
+ .set = dac5571_set_powerdown_mode,
+};
+
+static ssize_t dac5571_read_powerdown(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ char *buf)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+
+ return sprintf(buf, "%d\n", data->powerdown);
+}
+
+static ssize_t dac5571_write_powerdown(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+ bool powerdown;
+ int ret;
+
+ ret = strtobool(buf, &powerdown);
+ if (ret)
+ return ret;
+
+ if (data->powerdown == powerdown)
+ return len;
+
+ mutex_lock(&data->lock);
+ if (powerdown)
+ ret = data->dac5571_pwrdwn(data, chan->channel,
+ DAC5571_POWERDOWN(data->powerdown_mode));
+ else
+ ret = data->dac5571_cmd(data, chan->channel, data->val[0]);
+ if (ret)
+ goto out;
+
+ data->powerdown = powerdown;
+
+ out:
+ mutex_unlock(&data->lock);
+
+ return ret ? ret : len;
+}
+
+
+static const struct iio_chan_spec_ext_info dac5571_ext_info[] = {
+ {
+ .name = "powerdown",
+ .read = dac5571_read_powerdown,
+ .write = dac5571_write_powerdown,
+ .shared = IIO_SHARED_BY_TYPE,
+ },
+ IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &dac5571_powerdown_mode),
+ IIO_ENUM_AVAILABLE("powerdown_mode", &dac5571_powerdown_mode),
+ {},
+};
+
+#define dac5571_CHANNEL(chan, name) { \
+ .type = IIO_VOLTAGE, \
+ .channel = (chan), \
+ .address = (chan), \
+ .indexed = true, \
+ .output = true, \
+ .datasheet_name = name, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .ext_info = dac5571_ext_info, \
+}
+
+static const struct iio_chan_spec dac5571_channels[] = {
+ dac5571_CHANNEL(0, "A"),
+ dac5571_CHANNEL(1, "B"),
+ dac5571_CHANNEL(2, "C"),
+ dac5571_CHANNEL(3, "D"),
+};
+
+static int dac5571_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ *val = data->val[chan->channel];
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ ret = regulator_get_voltage(data->vref);
+ if (ret < 0)
+ return ret;
+
+ *val = ret / 1000;
+ *val2 = data->spec->resolution;
+ return IIO_VAL_FRACTIONAL_LOG2;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int dac5571_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct dac5571_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (data->val[chan->channel] == val)
+ return 0;
+
+ if (val >= (1 << data->spec->resolution) || val < 0)
+ return -EINVAL;
+
+ if (data->powerdown)
+ return -EBUSY;
+
+ mutex_lock(&data->lock);
+ ret = data->dac5571_cmd(data, chan->channel, val);
+ if (ret == 0)
+ data->val[chan->channel] = val;
+ mutex_unlock(&data->lock);
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int dac5571_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ return IIO_VAL_INT;
+}
+
+static const struct iio_info dac5571_info = {
+ .read_raw = dac5571_read_raw,
+ .write_raw = dac5571_write_raw,
+ .write_raw_get_fmt = dac5571_write_raw_get_fmt,
+};
+
+static int dac5571_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ const struct dac5571_spec *spec;
+ struct dac5571_data *data;
+ struct iio_dev *indio_dev;
+ int ret, i;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = dev;
+ indio_dev->dev.of_node = client->dev.of_node;
+ indio_dev->info = &dac5571_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = dac5571_channels;
+
+ spec = &dac5571_spec[id->driver_data];
+ indio_dev->num_channels = spec->num_channels;
+ data->spec = spec;
+
+ data->vref = devm_regulator_get(dev, "vref");
+ if (IS_ERR(data->vref))
+ return PTR_ERR(data->vref);
+
+ ret = regulator_enable(data->vref);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->lock);
+
+ switch (spec->num_channels) {
+ case 1:
+ data->dac5571_cmd = dac5571_cmd_single;
+ data->dac5571_pwrdwn = dac5571_pwrdwn_single;
+ break;
+ case 4:
+ data->dac5571_cmd = dac5571_cmd_quad;
+ data->dac5571_pwrdwn = dac5571_pwrdwn_quad;
+ break;
+ default:
+ goto err;
+ }
+
+ for (i = 0; i < spec->num_channels; i++) {
+ ret = data->dac5571_cmd(data, i, 0);
+ if (ret) {
+ dev_err(dev, "failed to initialize channel %d to 0\n", i);
+ goto err;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto err;
+
+ return 0;
+
+ err:
+ regulator_disable(data->vref);
+ return ret;
+}
+
+static int dac5571_remove(struct i2c_client *i2c)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(i2c);
+ struct dac5571_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ regulator_disable(data->vref);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id dac5571_of_id[] = {
+ {.compatible = "ti,dac5571"},
+ {.compatible = "ti,dac6571"},
+ {.compatible = "ti,dac7571"},
+ {.compatible = "ti,dac5574"},
+ {.compatible = "ti,dac6574"},
+ {.compatible = "ti,dac7574"},
+ {.compatible = "ti,dac5573"},
+ {.compatible = "ti,dac6573"},
+ {.compatible = "ti,dac7573"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, dac5571_of_id);
+#endif
+
+static const struct i2c_device_id dac5571_id[] = {
+ {"dac5571", single_8bit},
+ {"dac6571", single_10bit},
+ {"dac7571", single_12bit},
+ {"dac5574", quad_8bit},
+ {"dac6574", quad_10bit},
+ {"dac7574", quad_12bit},
+ {"dac5573", quad_8bit},
+ {"dac6573", quad_10bit},
+ {"dac7573", quad_12bit},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, dac5571_id);
+
+static struct i2c_driver dac5571_driver = {
+ .driver = {
+ .name = "ti-dac5571",
+ },
+ .probe = dac5571_probe,
+ .remove = dac5571_remove,
+ .id_table = dac5571_id,
+};
+module_i2c_driver(dac5571_driver);
+
+MODULE_AUTHOR("Sean Nyekjaer <sean.nyekjaer@prevas.dk>");
+MODULE_DESCRIPTION("Texas Instruments 8/10/12-bit 1/4-channel DAC driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-02 10:05:59 +0300