drivers/iio/adc/ti-ads124s08.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /* TI ADS124S0X chip family driver
  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
  */

 #include <linux/err.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>

 #include <linux/gpio/consumer.h>
 #include <linux/spi/spi.h>

 #include <linux/iio/iio.h>
 #include <linux/iio/buffer.h>
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>
 #include <linux/iio/sysfs.h>

 /* Commands */
 #define ADS124S08_CMD_NOP	0x00
 #define ADS124S08_CMD_WAKEUP	0x02
 #define ADS124S08_CMD_PWRDWN	0x04
 #define ADS124S08_CMD_RESET	0x06
 #define ADS124S08_CMD_START	0x08
 #define ADS124S08_CMD_STOP	0x0a
 #define ADS124S08_CMD_SYOCAL	0x16
 #define ADS124S08_CMD_SYGCAL	0x17
 #define ADS124S08_CMD_SFOCAL	0x19
 #define ADS124S08_CMD_RDATA	0x12
 #define ADS124S08_CMD_RREG	0x20
 #define ADS124S08_CMD_WREG	0x40

 /* Registers */
 #define ADS124S08_ID_REG	0x00
 #define ADS124S08_STATUS	0x01
 #define ADS124S08_INPUT_MUX	0x02
 #define ADS124S08_PGA		0x03
 #define ADS124S08_DATA_RATE	0x04
 #define ADS124S08_REF		0x05
 #define ADS124S08_IDACMAG	0x06
 #define ADS124S08_IDACMUX	0x07
 #define ADS124S08_VBIAS		0x08
 #define ADS124S08_SYS		0x09
 #define ADS124S08_OFCAL0	0x0a
 #define ADS124S08_OFCAL1	0x0b
 #define ADS124S08_OFCAL2	0x0c
 #define ADS124S08_FSCAL0	0x0d
 #define ADS124S08_FSCAL1	0x0e
 #define ADS124S08_FSCAL2	0x0f
 #define ADS124S08_GPIODAT	0x10
 #define ADS124S08_GPIOCON	0x11

 /* ADS124S0x common channels */
 #define ADS124S08_AIN0		0x00
 #define ADS124S08_AIN1		0x01
 #define ADS124S08_AIN2		0x02
 #define ADS124S08_AIN3		0x03
 #define ADS124S08_AIN4		0x04
 #define ADS124S08_AIN5		0x05
 #define ADS124S08_AINCOM	0x0c
 /* ADS124S08 only channels */
 #define ADS124S08_AIN6		0x06
 #define ADS124S08_AIN7		0x07
 #define ADS124S08_AIN8		0x08
 #define ADS124S08_AIN9		0x09
 #define ADS124S08_AIN10		0x0a
 #define ADS124S08_AIN11		0x0b
 #define ADS124S08_MAX_CHANNELS	12

 #define ADS124S08_POS_MUX_SHIFT	0x04
 #define ADS124S08_INT_REF		0x09

 #define ADS124S08_START_REG_MASK	0x1f
 #define ADS124S08_NUM_BYTES_MASK	0x1f

 #define ADS124S08_START_CONV	0x01
 #define ADS124S08_STOP_CONV	0x00

 enum ads124s_id {
 	ADS124S08_ID,
 	ADS124S06_ID,
 };

 struct ads124s_chip_info {
 	const struct iio_chan_spec *channels;
 	unsigned int num_channels;
 };

 struct ads124s_private {
 	const struct ads124s_chip_info	*chip_info;
 	struct gpio_desc *reset_gpio;
 	struct spi_device *spi;
 	struct mutex lock;
 	u8 data[5] ____cacheline_aligned;
 };

 #define ADS124S08_CHAN(index)					\
 {								\
 	.type = IIO_VOLTAGE,					\
 	.indexed = 1,						\
 	.channel = index,					\
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
 	.scan_index = index,					\
 	.scan_type = {						\
 		.sign = 'u',					\
 		.realbits = 32,					\
 		.storagebits = 32,				\
 	},							\
 }

 static const struct iio_chan_spec ads124s06_channels[] = {
 	ADS124S08_CHAN(0),
 	ADS124S08_CHAN(1),
 	ADS124S08_CHAN(2),
 	ADS124S08_CHAN(3),
 	ADS124S08_CHAN(4),
 	ADS124S08_CHAN(5),
 };

 static const struct iio_chan_spec ads124s08_channels[] = {
 	ADS124S08_CHAN(0),
 	ADS124S08_CHAN(1),
 	ADS124S08_CHAN(2),
 	ADS124S08_CHAN(3),
 	ADS124S08_CHAN(4),
 	ADS124S08_CHAN(5),
 	ADS124S08_CHAN(6),
 	ADS124S08_CHAN(7),
 	ADS124S08_CHAN(8),
 	ADS124S08_CHAN(9),
 	ADS124S08_CHAN(10),
 	ADS124S08_CHAN(11),
 };

 static const struct ads124s_chip_info ads124s_chip_info_tbl[] = {
 	[ADS124S08_ID] = {
 		.channels = ads124s08_channels,
 		.num_channels = ARRAY_SIZE(ads124s08_channels),
 	},
 	[ADS124S06_ID] = {
 		.channels = ads124s06_channels,
 		.num_channels = ARRAY_SIZE(ads124s06_channels),
 	},
 };

 static int ads124s_write_cmd(struct iio_dev *indio_dev, u8 command)
 {
 	struct ads124s_private *priv = iio_priv(indio_dev);

 	priv->data[0] = command;

 	return spi_write(priv->spi, &priv->data[0], 1);
 }

 static int ads124s_write_reg(struct iio_dev *indio_dev, u8 reg, u8 data)
 {
 	struct ads124s_private *priv = iio_priv(indio_dev);

 	priv->data[0] = ADS124S08_CMD_WREG | reg;
 	priv->data[1] = 0x0;
 	priv->data[2] = data;

 	return spi_write(priv->spi, &priv->data[0], 3);
 }

 static int ads124s_reset(struct iio_dev *indio_dev)
 {
 	struct ads124s_private *priv = iio_priv(indio_dev);

 	if (priv->reset_gpio) {
 		gpiod_set_value(priv->reset_gpio, 0);
 		udelay(200);
 		gpiod_set_value(priv->reset_gpio, 1);
 	} else {
 		return ads124s_write_cmd(indio_dev, ADS124S08_CMD_RESET);
 	}

 	return 0;
 };

 static int ads124s_read(struct iio_dev *indio_dev, unsigned int chan)
 {
 	struct ads124s_private *priv = iio_priv(indio_dev);
 	int ret;
 	u32 tmp;
 	struct spi_transfer t[] = {
 		{
 			.tx_buf = &priv->data[0],
 			.len = 4,
 			.cs_change = 1,
 		}, {
 			.tx_buf = &priv->data[1],
 			.rx_buf = &priv->data[1],
 			.len = 4,
 		},
 	};

 	priv->data[0] = ADS124S08_CMD_RDATA;
 	memset(&priv->data[1], ADS124S08_CMD_NOP, sizeof(priv->data) - 1);

 	ret = spi_sync_transfer(priv->spi, t, ARRAY_SIZE(t));
 	if (ret < 0)
 		return ret;

 	tmp = priv->data[2] << 16 | priv->data[3] << 8 | priv->data[4];

 	return tmp;
 }

 static int ads124s_read_raw(struct iio_dev *indio_dev,
 			    struct iio_chan_spec const *chan,
 			    int *val, int *val2, long m)
 {
 	struct ads124s_private *priv = iio_priv(indio_dev);
 	int ret;

 	mutex_lock(&priv->lock);
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
 		ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
 					chan->channel);
 		if (ret) {
 			dev_err(&priv->spi->dev, "Set ADC CH failed\n");
 			goto out;
 		}

 		ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
 		if (ret) {
 			dev_err(&priv->spi->dev, "Start conversions failed\n");
 			goto out;
 		}

 		ret = ads124s_read(indio_dev, chan->channel);
 		if (ret < 0) {
 			dev_err(&priv->spi->dev, "Read ADC failed\n");
 			goto out;
 		}

 		*val = ret;

 		ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
 		if (ret) {
 			dev_err(&priv->spi->dev, "Stop conversions failed\n");
 			goto out;
 		}

 		ret = IIO_VAL_INT;
 		break;
 	default:
 		ret = -EINVAL;
 		break;
 	}
 out:
 	mutex_unlock(&priv->lock);
 	return ret;
 }

 static const struct iio_info ads124s_info = {
 	.read_raw = &ads124s_read_raw,
 };

 static irqreturn_t ads124s_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct ads124s_private *priv = iio_priv(indio_dev);
 	u32 buffer[ADS124S08_MAX_CHANNELS + sizeof(s64)/sizeof(u16)];
 	int scan_index, j = 0;
 	int ret;

 	for_each_set_bit(scan_index, indio_dev->active_scan_mask,
 			 indio_dev->masklength) {
 		ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
 					scan_index);
 		if (ret)
 			dev_err(&priv->spi->dev, "Set ADC CH failed\n");

 		ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
 		if (ret)
 			dev_err(&priv->spi->dev, "Start ADC conversions failed\n");

 		buffer[j] = ads124s_read(indio_dev, scan_index);
 		ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
 		if (ret)
 			dev_err(&priv->spi->dev, "Stop ADC conversions failed\n");

 		j++;
 	}

 	iio_push_to_buffers_with_timestamp(indio_dev, buffer,
 			pf->timestamp);

 	iio_trigger_notify_done(indio_dev->trig);

 	return IRQ_HANDLED;
 }

 static int ads124s_probe(struct spi_device *spi)
 {
 	struct ads124s_private *ads124s_priv;
 	struct iio_dev *indio_dev;
 	const struct spi_device_id *spi_id = spi_get_device_id(spi);
 	int ret;

 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*ads124s_priv));
 	if (indio_dev == NULL)
 		return -ENOMEM;

 	ads124s_priv = iio_priv(indio_dev);

 	ads124s_priv->reset_gpio = devm_gpiod_get_optional(&spi->dev,
 						   "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(ads124s_priv->reset_gpio))
 		dev_info(&spi->dev, "Reset GPIO not defined\n");

 	ads124s_priv->chip_info = &ads124s_chip_info_tbl[spi_id->driver_data];

 	spi_set_drvdata(spi, indio_dev);

 	ads124s_priv->spi = spi;

 	indio_dev->name = spi_id->name;
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ads124s_priv->chip_info->channels;
 	indio_dev->num_channels = ads124s_priv->chip_info->num_channels;
 	indio_dev->info = &ads124s_info;

 	mutex_init(&ads124s_priv->lock);

 	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL,
 					      ads124s_trigger_handler, NULL);
 	if (ret) {
 		dev_err(&spi->dev, "iio triggered buffer setup failed\n");
 		return ret;
 	}

 	ads124s_reset(indio_dev);

 	return devm_iio_device_register(&spi->dev, indio_dev);
 }

 static const struct spi_device_id ads124s_id[] = {
 	{ "ads124s06", ADS124S06_ID },
 	{ "ads124s08", ADS124S08_ID },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ads124s_id);

 static const struct of_device_id ads124s_of_table[] = {
 	{ .compatible = "ti,ads124s06" },
 	{ .compatible = "ti,ads124s08" },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ads124s_of_table);

 static struct spi_driver ads124s_driver = {
 	.driver = {
 		.name	= "ads124s08",
 		.of_match_table = ads124s_of_table,
 	},
 	.probe		= ads124s_probe,
 	.id_table	= ads124s_id,
 };
 module_spi_driver(ads124s_driver);

 MODULE_AUTHOR("Dan Murphy <dmuprhy@ti.com>");
 MODULE_DESCRIPTION("TI TI_ADS12S0X ADC");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	/* TI ADS124S0X chip family driver
	* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
	*/

	#include <linux/err.h>
	#include <linux/delay.h>
	#include <linux/device.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/of_gpio.h>
	#include <linux/slab.h>
	#include <linux/sysfs.h>

	#include <linux/gpio/consumer.h>
	#include <linux/spi/spi.h>

	#include <linux/iio/iio.h>
	#include <linux/iio/buffer.h>
	#include <linux/iio/trigger_consumer.h>
	#include <linux/iio/triggered_buffer.h>
	#include <linux/iio/sysfs.h>

	/* Commands */
	#define ADS124S08_CMD_NOP 0x00
	#define ADS124S08_CMD_WAKEUP 0x02
	#define ADS124S08_CMD_PWRDWN 0x04
	#define ADS124S08_CMD_RESET 0x06
	#define ADS124S08_CMD_START 0x08
	#define ADS124S08_CMD_STOP 0x0a
	#define ADS124S08_CMD_SYOCAL 0x16
	#define ADS124S08_CMD_SYGCAL 0x17
	#define ADS124S08_CMD_SFOCAL 0x19
	#define ADS124S08_CMD_RDATA 0x12
	#define ADS124S08_CMD_RREG 0x20
	#define ADS124S08_CMD_WREG 0x40

	/* Registers */
	#define ADS124S08_ID_REG 0x00
	#define ADS124S08_STATUS 0x01
	#define ADS124S08_INPUT_MUX 0x02
	#define ADS124S08_PGA 0x03
	#define ADS124S08_DATA_RATE 0x04
	#define ADS124S08_REF 0x05
	#define ADS124S08_IDACMAG 0x06
	#define ADS124S08_IDACMUX 0x07
	#define ADS124S08_VBIAS 0x08
	#define ADS124S08_SYS 0x09
	#define ADS124S08_OFCAL0 0x0a
	#define ADS124S08_OFCAL1 0x0b
	#define ADS124S08_OFCAL2 0x0c
	#define ADS124S08_FSCAL0 0x0d
	#define ADS124S08_FSCAL1 0x0e
	#define ADS124S08_FSCAL2 0x0f
	#define ADS124S08_GPIODAT 0x10
	#define ADS124S08_GPIOCON 0x11

	/* ADS124S0x common channels */
	#define ADS124S08_AIN0 0x00
	#define ADS124S08_AIN1 0x01
	#define ADS124S08_AIN2 0x02
	#define ADS124S08_AIN3 0x03
	#define ADS124S08_AIN4 0x04
	#define ADS124S08_AIN5 0x05
	#define ADS124S08_AINCOM 0x0c
	/* ADS124S08 only channels */
	#define ADS124S08_AIN6 0x06
	#define ADS124S08_AIN7 0x07
	#define ADS124S08_AIN8 0x08
	#define ADS124S08_AIN9 0x09
	#define ADS124S08_AIN10 0x0a
	#define ADS124S08_AIN11 0x0b
	#define ADS124S08_MAX_CHANNELS 12

	#define ADS124S08_POS_MUX_SHIFT 0x04
	#define ADS124S08_INT_REF 0x09

	#define ADS124S08_START_REG_MASK 0x1f
	#define ADS124S08_NUM_BYTES_MASK 0x1f

	#define ADS124S08_START_CONV 0x01
	#define ADS124S08_STOP_CONV 0x00

	enum ads124s_id {
	ADS124S08_ID,
	ADS124S06_ID,
	};

	struct ads124s_chip_info {
	const struct iio_chan_spec *channels;
	unsigned int num_channels;
	};

	struct ads124s_private {
	const struct ads124s_chip_info *chip_info;
	struct gpio_desc *reset_gpio;
	struct spi_device *spi;
	struct mutex lock;
	u8 data[5] ____cacheline_aligned;
	};

	#define ADS124S08_CHAN(index) \
	{ \
	.type = IIO_VOLTAGE, \
	.indexed = 1, \
	.channel = index, \
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
	.scan_index = index, \
	.scan_type = { \
	.sign = 'u', \
	.realbits = 32, \
	.storagebits = 32, \
	}, \
	}

	static const struct iio_chan_spec ads124s06_channels[] = {
	ADS124S08_CHAN(0),
	ADS124S08_CHAN(1),
	ADS124S08_CHAN(2),
	ADS124S08_CHAN(3),
	ADS124S08_CHAN(4),
	ADS124S08_CHAN(5),
	};

	static const struct iio_chan_spec ads124s08_channels[] = {
	ADS124S08_CHAN(0),
	ADS124S08_CHAN(1),
	ADS124S08_CHAN(2),
	ADS124S08_CHAN(3),
	ADS124S08_CHAN(4),
	ADS124S08_CHAN(5),
	ADS124S08_CHAN(6),
	ADS124S08_CHAN(7),
	ADS124S08_CHAN(8),
	ADS124S08_CHAN(9),
	ADS124S08_CHAN(10),
	ADS124S08_CHAN(11),
	};

	static const struct ads124s_chip_info ads124s_chip_info_tbl[] = {
	[ADS124S08_ID] = {
	.channels = ads124s08_channels,
	.num_channels = ARRAY_SIZE(ads124s08_channels),
	},
	[ADS124S06_ID] = {
	.channels = ads124s06_channels,
	.num_channels = ARRAY_SIZE(ads124s06_channels),
	},
	};

	static int ads124s_write_cmd(struct iio_dev *indio_dev, u8 command)
	{
	struct ads124s_private *priv = iio_priv(indio_dev);

	priv->data[0] = command;

	return spi_write(priv->spi, &priv->data[0], 1);
	}

	static int ads124s_write_reg(struct iio_dev *indio_dev, u8 reg, u8 data)
	{
	struct ads124s_private *priv = iio_priv(indio_dev);

	priv->data[0] = ADS124S08_CMD_WREG \| reg;
	priv->data[1] = 0x0;
	priv->data[2] = data;

	return spi_write(priv->spi, &priv->data[0], 3);
	}

	static int ads124s_reset(struct iio_dev *indio_dev)
	{
	struct ads124s_private *priv = iio_priv(indio_dev);

	if (priv->reset_gpio) {
	gpiod_set_value(priv->reset_gpio, 0);
	udelay(200);
	gpiod_set_value(priv->reset_gpio, 1);
	} else {
	return ads124s_write_cmd(indio_dev, ADS124S08_CMD_RESET);
	}

	return 0;
	};

	static int ads124s_read(struct iio_dev *indio_dev, unsigned int chan)
	{
	struct ads124s_private *priv = iio_priv(indio_dev);
	int ret;
	u32 tmp;
	struct spi_transfer t[] = {
	{
	.tx_buf = &priv->data[0],
	.len = 4,
	.cs_change = 1,
	}, {
	.tx_buf = &priv->data[1],
	.rx_buf = &priv->data[1],
	.len = 4,
	},
	};

	priv->data[0] = ADS124S08_CMD_RDATA;
	memset(&priv->data[1], ADS124S08_CMD_NOP, sizeof(priv->data) - 1);

	ret = spi_sync_transfer(priv->spi, t, ARRAY_SIZE(t));
	if (ret < 0)
	return ret;

	tmp = priv->data[2] << 16 \| priv->data[3] << 8 \| priv->data[4];

	return tmp;
	}

	static int ads124s_read_raw(struct iio_dev *indio_dev,
	struct iio_chan_spec const *chan,
	int val, int val2, long m)
	{
	struct ads124s_private *priv = iio_priv(indio_dev);
	int ret;

	mutex_lock(&priv->lock);
	switch (m) {
	case IIO_CHAN_INFO_RAW:
	ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
	chan->channel);
	if (ret) {
	dev_err(&priv->spi->dev, "Set ADC CH failed\n");
	goto out;
	}

	ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
	if (ret) {
	dev_err(&priv->spi->dev, "Start conversions failed\n");
	goto out;
	}

	ret = ads124s_read(indio_dev, chan->channel);
	if (ret < 0) {
	dev_err(&priv->spi->dev, "Read ADC failed\n");
	goto out;
	}

	*val = ret;

	ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
	if (ret) {
	dev_err(&priv->spi->dev, "Stop conversions failed\n");
	goto out;
	}

	ret = IIO_VAL_INT;
	break;
	default:
	ret = -EINVAL;
	break;
	}
	out:
	mutex_unlock(&priv->lock);
	return ret;
	}

	static const struct iio_info ads124s_info = {
	.read_raw = &ads124s_read_raw,
	};

	static irqreturn_t ads124s_trigger_handler(int irq, void *p)
	{
	struct iio_poll_func *pf = p;
	struct iio_dev *indio_dev = pf->indio_dev;
	struct ads124s_private *priv = iio_priv(indio_dev);
	u32 buffer[ADS124S08_MAX_CHANNELS + sizeof(s64)/sizeof(u16)];
	int scan_index, j = 0;
	int ret;

	for_each_set_bit(scan_index, indio_dev->active_scan_mask,
	indio_dev->masklength) {
	ret = ads124s_write_reg(indio_dev, ADS124S08_INPUT_MUX,
	scan_index);
	if (ret)
	dev_err(&priv->spi->dev, "Set ADC CH failed\n");

	ret = ads124s_write_cmd(indio_dev, ADS124S08_START_CONV);
	if (ret)
	dev_err(&priv->spi->dev, "Start ADC conversions failed\n");

	buffer[j] = ads124s_read(indio_dev, scan_index);
	ret = ads124s_write_cmd(indio_dev, ADS124S08_STOP_CONV);
	if (ret)
	dev_err(&priv->spi->dev, "Stop ADC conversions failed\n");

	j++;
	}

	iio_push_to_buffers_with_timestamp(indio_dev, buffer,
	pf->timestamp);

	iio_trigger_notify_done(indio_dev->trig);

	return IRQ_HANDLED;
	}

	static int ads124s_probe(struct spi_device *spi)
	{
	struct ads124s_private *ads124s_priv;
	struct iio_dev *indio_dev;
	const struct spi_device_id *spi_id = spi_get_device_id(spi);
	int ret;

	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*ads124s_priv));
	if (indio_dev == NULL)
	return -ENOMEM;

	ads124s_priv = iio_priv(indio_dev);

	ads124s_priv->reset_gpio = devm_gpiod_get_optional(&spi->dev,
	"reset", GPIOD_OUT_LOW);
	if (IS_ERR(ads124s_priv->reset_gpio))
	dev_info(&spi->dev, "Reset GPIO not defined\n");

	ads124s_priv->chip_info = &ads124s_chip_info_tbl[spi_id->driver_data];

	spi_set_drvdata(spi, indio_dev);

	ads124s_priv->spi = spi;

	indio_dev->name = spi_id->name;
	indio_dev->dev.parent = &spi->dev;
	indio_dev->dev.of_node = spi->dev.of_node;
	indio_dev->modes = INDIO_DIRECT_MODE;
	indio_dev->channels = ads124s_priv->chip_info->channels;
	indio_dev->num_channels = ads124s_priv->chip_info->num_channels;
	indio_dev->info = &ads124s_info;

	mutex_init(&ads124s_priv->lock);

	ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, NULL,
	ads124s_trigger_handler, NULL);
	if (ret) {
	dev_err(&spi->dev, "iio triggered buffer setup failed\n");
	return ret;
	}

	ads124s_reset(indio_dev);

	return devm_iio_device_register(&spi->dev, indio_dev);
	}

	static const struct spi_device_id ads124s_id[] = {
	{ "ads124s06", ADS124S06_ID },
	{ "ads124s08", ADS124S08_ID },
	{ }
	};
	MODULE_DEVICE_TABLE(spi, ads124s_id);

	static const struct of_device_id ads124s_of_table[] = {
	{ .compatible = "ti,ads124s06" },
	{ .compatible = "ti,ads124s08" },
	{ },
	};
	MODULE_DEVICE_TABLE(of, ads124s_of_table);

	static struct spi_driver ads124s_driver = {
	.driver = {
	.name = "ads124s08",
	.of_match_table = ads124s_of_table,
	},
	.probe = ads124s_probe,
	.id_table = ads124s_id,
	};
	module_spi_driver(ads124s_driver);

	MODULE_AUTHOR("Dan Murphy <dmuprhy@ti.com>");
	MODULE_DESCRIPTION("TI TI_ADS12S0X ADC");
	MODULE_LICENSE("GPL v2");