drivers/iio/dac/ti-dac082s085.c - SHIFTPHONES/mainline/linux - Gitiles

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * ti-dac082s085.c - Texas Instruments 8/10/12-bit 2/4-channel DAC driver
  *
  * Copyright (C) 2017 KUNBUS GmbH
  *
  * https://www.ti.com/lit/ds/symlink/dac082s085.pdf
  * https://www.ti.com/lit/ds/symlink/dac102s085.pdf
  * https://www.ti.com/lit/ds/symlink/dac122s085.pdf
  * https://www.ti.com/lit/ds/symlink/dac084s085.pdf
  * https://www.ti.com/lit/ds/symlink/dac104s085.pdf
  * https://www.ti.com/lit/ds/symlink/dac124s085.pdf
  */

 #include <linux/iio/iio.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

 enum { dual_8bit, dual_10bit, dual_12bit, quad_8bit, quad_10bit, quad_12bit };

 struct ti_dac_spec {
 	u8 num_channels;
 	u8 resolution;
 };

 static const struct ti_dac_spec ti_dac_spec[] = {
 	[dual_8bit]  = { .num_channels = 2, .resolution = 8  },
 	[dual_10bit] = { .num_channels = 2, .resolution = 10 },
 	[dual_12bit] = { .num_channels = 2, .resolution = 12 },
 	[quad_8bit]  = { .num_channels = 4, .resolution = 8  },
 	[quad_10bit] = { .num_channels = 4, .resolution = 10 },
 	[quad_12bit] = { .num_channels = 4, .resolution = 12 },
 };

 /**
  * struct ti_dac_chip - TI DAC chip
  * @lock: protects write sequences
  * @vref: regulator generating Vref
  * @mesg: SPI message to perform a write
  * @xfer: SPI transfer used by @mesg
  * @val: cached value of each output
  * @powerdown: whether the chip is powered down
  * @powerdown_mode: selected by the user
  * @resolution: resolution of the chip
  * @buf: buffer for @xfer
  */
 struct ti_dac_chip {
 	struct mutex lock;
 	struct regulator *vref;
 	struct spi_message mesg;
 	struct spi_transfer xfer;
 	u16 val[4];
 	bool powerdown;
 	u8 powerdown_mode;
 	u8 resolution;
 	u8 buf[2] ____cacheline_aligned;
 };

 #define WRITE_NOT_UPDATE(chan)	(0x00 | (chan) << 6)
 #define WRITE_AND_UPDATE(chan)	(0x10 | (chan) << 6)
 #define WRITE_ALL_UPDATE	 0x20
 #define POWERDOWN(mode) 	(0x30 | ((mode) + 1) << 6)

 static int ti_dac_cmd(struct ti_dac_chip *ti_dac, u8 cmd, u16 val)
 {
 	u8 shift = 12 - ti_dac->resolution;

 	ti_dac->buf[0] = cmd | (val >> (8 - shift));
 	ti_dac->buf[1] = (val << shift) & 0xff;
 	return spi_sync(ti_dac->mesg.spi, &ti_dac->mesg);
 }

 static const char * const ti_dac_powerdown_modes[] = {
 	"2.5kohm_to_gnd", "100kohm_to_gnd", "three_state",
 };

 static int ti_dac_get_powerdown_mode(struct iio_dev *indio_dev,
 				     const struct iio_chan_spec *chan)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

 	return ti_dac->powerdown_mode;
 }

 static int ti_dac_set_powerdown_mode(struct iio_dev *indio_dev,
 				     const struct iio_chan_spec *chan,
 				     unsigned int mode)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
 	int ret = 0;

 	if (ti_dac->powerdown_mode == mode)
 		return 0;

 	mutex_lock(&ti_dac->lock);
 	if (ti_dac->powerdown) {
 		ret = ti_dac_cmd(ti_dac, POWERDOWN(mode), 0);
 		if (ret)
 			goto out;
 	}
 	ti_dac->powerdown_mode = mode;

 out:
 	mutex_unlock(&ti_dac->lock);
 	return ret;
 }

 static const struct iio_enum ti_dac_powerdown_mode = {
 	.items = ti_dac_powerdown_modes,
 	.num_items = ARRAY_SIZE(ti_dac_powerdown_modes),
 	.get = ti_dac_get_powerdown_mode,
 	.set = ti_dac_set_powerdown_mode,
 };

 static ssize_t ti_dac_read_powerdown(struct iio_dev *indio_dev,
 				     uintptr_t private,
 				     const struct iio_chan_spec *chan,
 				     char *buf)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

 	return sysfs_emit(buf, "%d\n", ti_dac->powerdown);
 }

 static ssize_t ti_dac_write_powerdown(struct iio_dev *indio_dev,
 				      uintptr_t private,
 				      const struct iio_chan_spec *chan,
 				      const char *buf, size_t len)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
 	bool powerdown;
 	int ret;

 	ret = strtobool(buf, &powerdown);
 	if (ret)
 		return ret;

 	if (ti_dac->powerdown == powerdown)
 		return len;

 	mutex_lock(&ti_dac->lock);
 	if (powerdown)
 		ret = ti_dac_cmd(ti_dac, POWERDOWN(ti_dac->powerdown_mode), 0);
 	else
 		ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(0), ti_dac->val[0]);
 	if (!ret)
 		ti_dac->powerdown = powerdown;
 	mutex_unlock(&ti_dac->lock);

 	return ret ? ret : len;
 }

 static const struct iio_chan_spec_ext_info ti_dac_ext_info[] = {
 	{
 		.name	   = "powerdown",
 		.read	   = ti_dac_read_powerdown,
 		.write	   = ti_dac_write_powerdown,
 		.shared	   = IIO_SHARED_BY_TYPE,
 	},
 	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
 	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
 	{ },
 };

 #define TI_DAC_CHANNEL(chan) {					\
 	.type = IIO_VOLTAGE,					\
 	.channel = (chan),					\
 	.address = (chan),					\
 	.indexed = true,					\
 	.output = true,						\
 	.datasheet_name = (const char[]){ 'A' + (chan), 0 },	\
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
 	.ext_info = ti_dac_ext_info,				\
 }

 static const struct iio_chan_spec ti_dac_channels[] = {
 	TI_DAC_CHANNEL(0),
 	TI_DAC_CHANNEL(1),
 	TI_DAC_CHANNEL(2),
 	TI_DAC_CHANNEL(3),
 };

 static int ti_dac_read_raw(struct iio_dev *indio_dev,
 			   struct iio_chan_spec const *chan,
 			   int *val, int *val2, long mask)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
 	int ret;

 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		*val = ti_dac->val[chan->channel];
 		ret = IIO_VAL_INT;
 		break;

 	case IIO_CHAN_INFO_SCALE:
 		ret = regulator_get_voltage(ti_dac->vref);
 		if (ret < 0)
 			return ret;

 		*val = ret / 1000;
 		*val2 = ti_dac->resolution;
 		ret = IIO_VAL_FRACTIONAL_LOG2;
 		break;

 	default:
 		ret = -EINVAL;
 	}

 	return ret;
 }

 static int ti_dac_write_raw(struct iio_dev *indio_dev,
 			    struct iio_chan_spec const *chan,
 			    int val, int val2, long mask)
 {
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
 	int ret;

 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		if (ti_dac->val[chan->channel] == val)
 			return 0;

 		if (val >= (1 << ti_dac->resolution) || val < 0)
 			return -EINVAL;

 		if (ti_dac->powerdown)
 			return -EBUSY;

 		mutex_lock(&ti_dac->lock);
 		ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(chan->channel), val);
 		if (!ret)
 			ti_dac->val[chan->channel] = val;
 		mutex_unlock(&ti_dac->lock);
 		break;

 	default:
 		ret = -EINVAL;
 	}

 	return ret;
 }

 static int ti_dac_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 ti_dac_info = {
 	.read_raw	   = ti_dac_read_raw,
 	.write_raw	   = ti_dac_write_raw,
 	.write_raw_get_fmt = ti_dac_write_raw_get_fmt,
 };

 static int ti_dac_probe(struct spi_device *spi)
 {
 	struct device *dev = &spi->dev;
 	const struct ti_dac_spec *spec;
 	struct ti_dac_chip *ti_dac;
 	struct iio_dev *indio_dev;
 	int ret;

 	indio_dev = devm_iio_device_alloc(dev, sizeof(*ti_dac));
 	if (!indio_dev)
 		return -ENOMEM;

 	indio_dev->info = &ti_dac_info;
 	indio_dev->name = spi->modalias;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ti_dac_channels;
 	spi_set_drvdata(spi, indio_dev);

 	ti_dac = iio_priv(indio_dev);
 	ti_dac->xfer.tx_buf = &ti_dac->buf;
 	ti_dac->xfer.len = sizeof(ti_dac->buf);
 	spi_message_init_with_transfers(&ti_dac->mesg, &ti_dac->xfer, 1);
 	ti_dac->mesg.spi = spi;

 	spec = &ti_dac_spec[spi_get_device_id(spi)->driver_data];
 	indio_dev->num_channels = spec->num_channels;
 	ti_dac->resolution = spec->resolution;

 	ti_dac->vref = devm_regulator_get(dev, "vref");
 	if (IS_ERR(ti_dac->vref))
 		return PTR_ERR(ti_dac->vref);

 	ret = regulator_enable(ti_dac->vref);
 	if (ret < 0)
 		return ret;

 	mutex_init(&ti_dac->lock);

 	ret = ti_dac_cmd(ti_dac, WRITE_ALL_UPDATE, 0);
 	if (ret) {
 		dev_err(dev, "failed to initialize outputs to 0\n");
 		goto err;
 	}

 	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto err;

 	return 0;

 err:
 	mutex_destroy(&ti_dac->lock);
 	regulator_disable(ti_dac->vref);
 	return ret;
 }

 static int ti_dac_remove(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

 	iio_device_unregister(indio_dev);
 	mutex_destroy(&ti_dac->lock);
 	regulator_disable(ti_dac->vref);

 	return 0;
 }

 static const struct of_device_id ti_dac_of_id[] = {
 	{ .compatible = "ti,dac082s085" },
 	{ .compatible = "ti,dac102s085" },
 	{ .compatible = "ti,dac122s085" },
 	{ .compatible = "ti,dac084s085" },
 	{ .compatible = "ti,dac104s085" },
 	{ .compatible = "ti,dac124s085" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ti_dac_of_id);

 static const struct spi_device_id ti_dac_spi_id[] = {
 	{ "dac082s085", dual_8bit  },
 	{ "dac102s085", dual_10bit },
 	{ "dac122s085", dual_12bit },
 	{ "dac084s085", quad_8bit  },
 	{ "dac104s085", quad_10bit },
 	{ "dac124s085", quad_12bit },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ti_dac_spi_id);

 static struct spi_driver ti_dac_driver = {
 	.driver = {
 		.name		= "ti-dac082s085",
 		.of_match_table	= ti_dac_of_id,
 	},
 	.probe	  = ti_dac_probe,
 	.remove   = ti_dac_remove,
 	.id_table = ti_dac_spi_id,
 };
 module_spi_driver(ti_dac_driver);

 MODULE_AUTHOR("Lukas Wunner <lukas@wunner.de>");
 MODULE_DESCRIPTION("Texas Instruments 8/10/12-bit 2/4-channel DAC driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* ti-dac082s085.c - Texas Instruments 8/10/12-bit 2/4-channel DAC driver
	*
	* Copyright (C) 2017 KUNBUS GmbH
	*
	* https://www.ti.com/lit/ds/symlink/dac082s085.pdf
	* https://www.ti.com/lit/ds/symlink/dac102s085.pdf
	* https://www.ti.com/lit/ds/symlink/dac122s085.pdf
	* https://www.ti.com/lit/ds/symlink/dac084s085.pdf
	* https://www.ti.com/lit/ds/symlink/dac104s085.pdf
	* https://www.ti.com/lit/ds/symlink/dac124s085.pdf
	*/

	#include <linux/iio/iio.h>
	#include <linux/module.h>
	#include <linux/mod_devicetable.h>
	#include <linux/regulator/consumer.h>
	#include <linux/spi/spi.h>

	enum { dual_8bit, dual_10bit, dual_12bit, quad_8bit, quad_10bit, quad_12bit };

	struct ti_dac_spec {
	u8 num_channels;
	u8 resolution;
	};

	static const struct ti_dac_spec ti_dac_spec[] = {
	[dual_8bit] = { .num_channels = 2, .resolution = 8 },
	[dual_10bit] = { .num_channels = 2, .resolution = 10 },
	[dual_12bit] = { .num_channels = 2, .resolution = 12 },
	[quad_8bit] = { .num_channels = 4, .resolution = 8 },
	[quad_10bit] = { .num_channels = 4, .resolution = 10 },
	[quad_12bit] = { .num_channels = 4, .resolution = 12 },
	};

	/**
	* struct ti_dac_chip - TI DAC chip
	* @lock: protects write sequences
	* @vref: regulator generating Vref
	* @mesg: SPI message to perform a write
	* @xfer: SPI transfer used by @mesg
	* @val: cached value of each output
	* @powerdown: whether the chip is powered down
	* @powerdown_mode: selected by the user
	* @resolution: resolution of the chip
	* @buf: buffer for @xfer
	*/
	struct ti_dac_chip {
	struct mutex lock;
	struct regulator *vref;
	struct spi_message mesg;
	struct spi_transfer xfer;
	u16 val[4];
	bool powerdown;
	u8 powerdown_mode;
	u8 resolution;
	u8 buf[2] ____cacheline_aligned;
	};

	#define WRITE_NOT_UPDATE(chan) (0x00 \| (chan) << 6)
	#define WRITE_AND_UPDATE(chan) (0x10 \| (chan) << 6)
	#define WRITE_ALL_UPDATE 0x20
	#define POWERDOWN(mode) (0x30 \| ((mode) + 1) << 6)

	static int ti_dac_cmd(struct ti_dac_chip *ti_dac, u8 cmd, u16 val)
	{
	u8 shift = 12 - ti_dac->resolution;

	ti_dac->buf[0] = cmd \| (val >> (8 - shift));
	ti_dac->buf[1] = (val << shift) & 0xff;
	return spi_sync(ti_dac->mesg.spi, &ti_dac->mesg);
	}

	static const char * const ti_dac_powerdown_modes[] = {
	"2.5kohm_to_gnd", "100kohm_to_gnd", "three_state",
	};

	static int ti_dac_get_powerdown_mode(struct iio_dev *indio_dev,
	const struct iio_chan_spec *chan)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

	return ti_dac->powerdown_mode;
	}

	static int ti_dac_set_powerdown_mode(struct iio_dev *indio_dev,
	const struct iio_chan_spec *chan,
	unsigned int mode)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
	int ret = 0;

	if (ti_dac->powerdown_mode == mode)
	return 0;

	mutex_lock(&ti_dac->lock);
	if (ti_dac->powerdown) {
	ret = ti_dac_cmd(ti_dac, POWERDOWN(mode), 0);
	if (ret)
	goto out;
	}
	ti_dac->powerdown_mode = mode;

	out:
	mutex_unlock(&ti_dac->lock);
	return ret;
	}

	static const struct iio_enum ti_dac_powerdown_mode = {
	.items = ti_dac_powerdown_modes,
	.num_items = ARRAY_SIZE(ti_dac_powerdown_modes),
	.get = ti_dac_get_powerdown_mode,
	.set = ti_dac_set_powerdown_mode,
	};

	static ssize_t ti_dac_read_powerdown(struct iio_dev *indio_dev,
	uintptr_t private,
	const struct iio_chan_spec *chan,
	char *buf)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

	return sysfs_emit(buf, "%d\n", ti_dac->powerdown);
	}

	static ssize_t ti_dac_write_powerdown(struct iio_dev *indio_dev,
	uintptr_t private,
	const struct iio_chan_spec *chan,
	const char *buf, size_t len)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
	bool powerdown;
	int ret;

	ret = strtobool(buf, &powerdown);
	if (ret)
	return ret;

	if (ti_dac->powerdown == powerdown)
	return len;

	mutex_lock(&ti_dac->lock);
	if (powerdown)
	ret = ti_dac_cmd(ti_dac, POWERDOWN(ti_dac->powerdown_mode), 0);
	else
	ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(0), ti_dac->val[0]);
	if (!ret)
	ti_dac->powerdown = powerdown;
	mutex_unlock(&ti_dac->lock);

	return ret ? ret : len;
	}

	static const struct iio_chan_spec_ext_info ti_dac_ext_info[] = {
	{
	.name = "powerdown",
	.read = ti_dac_read_powerdown,
	.write = ti_dac_write_powerdown,
	.shared = IIO_SHARED_BY_TYPE,
	},
	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
	IIO_ENUM_AVAILABLE("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
	{ },
	};

	#define TI_DAC_CHANNEL(chan) { \
	.type = IIO_VOLTAGE, \
	.channel = (chan), \
	.address = (chan), \
	.indexed = true, \
	.output = true, \
	.datasheet_name = (const char[]){ 'A' + (chan), 0 }, \
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
	.ext_info = ti_dac_ext_info, \
	}

	static const struct iio_chan_spec ti_dac_channels[] = {
	TI_DAC_CHANNEL(0),
	TI_DAC_CHANNEL(1),
	TI_DAC_CHANNEL(2),
	TI_DAC_CHANNEL(3),
	};

	static int ti_dac_read_raw(struct iio_dev *indio_dev,
	struct iio_chan_spec const *chan,
	int val, int val2, long mask)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
	*val = ti_dac->val[chan->channel];
	ret = IIO_VAL_INT;
	break;

	case IIO_CHAN_INFO_SCALE:
	ret = regulator_get_voltage(ti_dac->vref);
	if (ret < 0)
	return ret;

	*val = ret / 1000;
	*val2 = ti_dac->resolution;
	ret = IIO_VAL_FRACTIONAL_LOG2;
	break;

	default:
	ret = -EINVAL;
	}

	return ret;
	}

	static int ti_dac_write_raw(struct iio_dev *indio_dev,
	struct iio_chan_spec const *chan,
	int val, int val2, long mask)
	{
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
	int ret;

	switch (mask) {
	case IIO_CHAN_INFO_RAW:
	if (ti_dac->val[chan->channel] == val)
	return 0;

	if (val >= (1 << ti_dac->resolution) \|\| val < 0)
	return -EINVAL;

	if (ti_dac->powerdown)
	return -EBUSY;

	mutex_lock(&ti_dac->lock);
	ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(chan->channel), val);
	if (!ret)
	ti_dac->val[chan->channel] = val;
	mutex_unlock(&ti_dac->lock);
	break;

	default:
	ret = -EINVAL;
	}

	return ret;
	}

	static int ti_dac_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 ti_dac_info = {
	.read_raw = ti_dac_read_raw,
	.write_raw = ti_dac_write_raw,
	.write_raw_get_fmt = ti_dac_write_raw_get_fmt,
	};

	static int ti_dac_probe(struct spi_device *spi)
	{
	struct device *dev = &spi->dev;
	const struct ti_dac_spec *spec;
	struct ti_dac_chip *ti_dac;
	struct iio_dev *indio_dev;
	int ret;

	indio_dev = devm_iio_device_alloc(dev, sizeof(*ti_dac));
	if (!indio_dev)
	return -ENOMEM;

	indio_dev->info = &ti_dac_info;
	indio_dev->name = spi->modalias;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->channels = ti_dac_channels;
	spi_set_drvdata(spi, indio_dev);

	ti_dac = iio_priv(indio_dev);
	ti_dac->xfer.tx_buf = &ti_dac->buf;
	ti_dac->xfer.len = sizeof(ti_dac->buf);
	spi_message_init_with_transfers(&ti_dac->mesg, &ti_dac->xfer, 1);
	ti_dac->mesg.spi = spi;

	spec = &ti_dac_spec[spi_get_device_id(spi)->driver_data];
	indio_dev->num_channels = spec->num_channels;
	ti_dac->resolution = spec->resolution;

	ti_dac->vref = devm_regulator_get(dev, "vref");
	if (IS_ERR(ti_dac->vref))
	return PTR_ERR(ti_dac->vref);

	ret = regulator_enable(ti_dac->vref);
	if (ret < 0)
	return ret;

	mutex_init(&ti_dac->lock);

	ret = ti_dac_cmd(ti_dac, WRITE_ALL_UPDATE, 0);
	if (ret) {
	dev_err(dev, "failed to initialize outputs to 0\n");
	goto err;
	}

	ret = iio_device_register(indio_dev);
	if (ret)
	goto err;

	return 0;

	err:
	mutex_destroy(&ti_dac->lock);
	regulator_disable(ti_dac->vref);
	return ret;
	}

	static int ti_dac_remove(struct spi_device *spi)
	{
	struct iio_dev *indio_dev = spi_get_drvdata(spi);
	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);

	iio_device_unregister(indio_dev);
	mutex_destroy(&ti_dac->lock);
	regulator_disable(ti_dac->vref);

	return 0;
	}

	static const struct of_device_id ti_dac_of_id[] = {
	{ .compatible = "ti,dac082s085" },
	{ .compatible = "ti,dac102s085" },
	{ .compatible = "ti,dac122s085" },
	{ .compatible = "ti,dac084s085" },
	{ .compatible = "ti,dac104s085" },
	{ .compatible = "ti,dac124s085" },
	{ }
	};
	MODULE_DEVICE_TABLE(of, ti_dac_of_id);

	static const struct spi_device_id ti_dac_spi_id[] = {
	{ "dac082s085", dual_8bit },
	{ "dac102s085", dual_10bit },
	{ "dac122s085", dual_12bit },
	{ "dac084s085", quad_8bit },
	{ "dac104s085", quad_10bit },
	{ "dac124s085", quad_12bit },
	{ }
	};
	MODULE_DEVICE_TABLE(spi, ti_dac_spi_id);

	static struct spi_driver ti_dac_driver = {
	.driver = {
	.name = "ti-dac082s085",
	.of_match_table = ti_dac_of_id,
	},
	.probe = ti_dac_probe,
	.remove = ti_dac_remove,
	.id_table = ti_dac_spi_id,
	};
	module_spi_driver(ti_dac_driver);

	MODULE_AUTHOR("Lukas Wunner <lukas@wunner.de>");
	MODULE_DESCRIPTION("Texas Instruments 8/10/12-bit 2/4-channel DAC driver");
	MODULE_LICENSE("GPL v2");