[PATCH v2 3/3] iio: addac: add AD74413R driver

[Cosmin Tanislav]

From: Cosmin Tanislav <cosmin.tanislav@xxxxxxxxxx>

Add IIO ADDAC driver for AD74413R.

Signed-off-by: Cosmin Tanislav <cosmin.tanislav@xxxxxxxxxx>
---
 MAINTAINERS                  |    9 +
 drivers/iio/addac/Kconfig    |   12 +
 drivers/iio/addac/Makefile   |    1 +
 drivers/iio/addac/ad74413r.c | 1389 ++++++++++++++++++++++++++++++++++
 4 files changed, 1411 insertions(+)
 create mode 100644 drivers/iio/addac/ad74413r.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 37982beaf91f..174f0fd3d71c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1069,6 +1069,15 @@ W:	http://ez.analog.com/community/linux-device-drivers
 F:	Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml
 F:	drivers/iio/adc/ad7780.c
 
+ANALOG DEVICES INC AD74413R DRIVER
+M:	Cosmin Tanislav <cosmin.tanislav@xxxxxxxxxx>
+L:	linux-iio@xxxxxxxxxxxxxxx
+S:	Supported
+W:	http://ez.analog.com/community/linux-device-drivers
+F:	Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
+F:	drivers/iio/addac/ad74413r.c
+F:	include/dt-bindings/iio/addac/adi,ad74413r.h
+
 ANALOG DEVICES INC AD9389B DRIVER
 M:	Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
 L:	linux-media@xxxxxxxxxxxxxxx
diff --git a/drivers/iio/addac/Kconfig b/drivers/iio/addac/Kconfig
index 2e64d7755d5e..06b26f8d0144 100644
--- a/drivers/iio/addac/Kconfig
+++ b/drivers/iio/addac/Kconfig
@@ -5,4 +5,16 @@
 
 menu "Analog to digital and digital to analog converters"
 
+config AD74413R
+	tristate "Analog Devices AD74413R/AD74412R driver"
+	depends on GPIOLIB && SPI
+	select REGMAP_SPI
+	select CRC8
+	help
+	  Say yes here to build support for Analog Devices AD74413R/AD74412R
+	  quad-channel software configurable input/output solution.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad74413r.
+
 endmenu
diff --git a/drivers/iio/addac/Makefile b/drivers/iio/addac/Makefile
index b888b9ee12da..cfd4bbe64ad3 100644
--- a/drivers/iio/addac/Makefile
+++ b/drivers/iio/addac/Makefile
@@ -4,3 +4,4 @@
 #
 
 # When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_AD74413R) += ad74413r.o
diff --git a/drivers/iio/addac/ad74413r.c b/drivers/iio/addac/ad74413r.c
new file mode 100644
index 000000000000..76d2e09a17ee
--- /dev/null
+++ b/drivers/iio/addac/ad74413r.c
@@ -0,0 +1,1389 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Analog Devices, Inc.
+ * Author: Cosmin Tanislav <cosmin.tanislav@xxxxxxxxxx>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/crc8.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <dt-bindings/iio/addac/adi,ad74413r.h>
+
+#define AD74413R_CRC_POLYNOMIAL	0x7
+DECLARE_CRC8_TABLE(ad74413r_crc8_table);
+
+#define AD74413R_CHANNEL_MAX	4
+
+struct ad74413r_config {
+	bool hart_support;
+};
+
+struct ad74413r_channel_config {
+	u32 gpo_config;
+	u32 func;
+	bool initialized;
+};
+
+struct ad74413r_state {
+	struct ad74413r_channel_config	channel_configs[AD74413R_CHANNEL_MAX];
+	struct gpio_chip		gpiochip;
+	struct mutex			lock;
+	struct completion		adc_data_completion;
+
+	struct spi_device		*spi;
+	struct iio_dev			*indio_dev;
+	struct regulator		*refin_reg;
+	struct regmap			*regmap;
+	struct device			*dev;
+	struct iio_trigger		*trig;
+	const struct ad74413r_config	*config;
+
+	u32				rsense_resistance_ohms;
+
+	size_t				adc_active_channels;
+	struct spi_message		adc_samples_msg;
+	struct spi_transfer		adc_samples_xfer[AD74413R_CHANNEL_MAX + 1];
+	struct {
+		__be32 rx_buf[AD74413R_CHANNEL_MAX];
+		s64 timestamp;
+	} adc_samples ____cacheline_aligned;
+	__be32				adc_samples_tx_buf[AD74413R_CHANNEL_MAX];
+	__be32				regmap_tx_buf;
+	__be32				regmap_rx_buf;
+};
+
+#define AD74413R_REG_NOP		0x00
+
+#define AD74413R_REG_CH_FUNC_SETUP_X(x)	(0x01 + (x))
+#define AD74413R_CH_FUNC_SETUP_MASK	GENMASK(3, 0)
+
+#define AD74413R_REG_ADC_CONFIG_X(x)		(0x05 + (x))
+#define AD74413R_ADC_CONFIG_RANGE_MASK		GENMASK(7, 5)
+#define AD74413R_ADC_CONFIG_REJECTION_MASK	GENMASK(4, 3)
+#define AD74413R_ADC_RANGE_10V			0b000
+#define AD74413R_ADC_RANGE_2P5V_EXT_POW		0b001
+#define AD74413R_ADC_RANGE_2P5V_INT_POW		0b010
+#define AD74413R_ADC_RANGE_5V_BI_DIR		0b011
+#define AD74413R_ADC_REJECTION_50_60		0b00
+#define AD74413R_ADC_REJECTION_NONE		0b01
+#define AD74413R_ADC_REJECTION_50_60_HART	0b10
+#define AD74413R_ADC_REJECTION_HART		0b11
+
+#define AD74413R_REG_DAC_CODE_X(x)	(0x16 + (x))
+#define AD74413R_DAC_CODE_MAX		((1 << 13) - 1)
+
+#define AD74413R_REG_GPO_PAR_DATA		0x0d
+#define AD74413R_REG_GPO_CONFIG_X(x)		(0x0e + (x))
+#define AD74413R_GPO_CONFIG_GPO_DATA_MASK	BIT(3)
+#define AD74413R_GPO_CONFIG_DATA_LOW		0
+#define AD74413R_GPO_CONFIG_DATA_HIGH		AD74413R_GPO_CONFIG_GPO_DATA_MASK
+#define AD74413R_GPO_CONFIG_GPO_SELECT_MASK	GENMASK(2, 0)
+
+#define AD74413R_REG_ADC_CONV_CTRL	0x23
+#define AD74413R_CONV_SEQ_MASK		GENMASK(9, 8)
+#define AD74413R_CONV_SEQ_ON		0b00
+#define AD74413R_CONV_SEQ_SINGLE	0b01
+#define AD74413R_CONV_SEQ_CONTINUOUS	0b10
+#define AD74413R_CONV_SEQ_OFF		0b11
+#define AD74413R_CH_EN_MASK(x)		BIT(x)
+#define AD74413R_CH_EN_SHIFT(x)		x
+
+#define AD74413R_REG_DIN_COMP_OUT		0x25
+#define AD74413R_DIN_COMP_OUT_MASK_X(x)		BIT(x)
+#define AD74413R_DIN_COMP_OUT_SHIFT_X(x)	x
+
+#define AD74413R_REG_ADC_RESULT_X(x)	(0x26 + (x))
+#define AD74413R_ADC_RESULT_MAX		((1 << 16) - 1)
+
+#define AD74413R_REG_READ_SELECT	0x41
+
+#define AD74413R_REG_CMD_KEY		0x44
+#define AD74413R_CMD_KEY_LDAC		0x953a
+
+#define AD74413R_REG_SILLICON_REV		0x46
+#define AD74413R_SILLICON_REV_ID_MASK		GENMASK(7, 0)
+#define AD74413R_SILLICON_REV_ID_EXPECTED	0x8
+
+#define AD74413R_ADC_DATA_TIMEOUT	1000
+
+static const int ad74413r_adc_sampling_rates[] = {
+	20,
+	4800,
+};
+
+static const int ad74413r_adc_sampling_rates_hart[] = {
+	10,
+	20,
+	1200,
+	4800,
+};
+
+static int ad74413r_crc(u8 *buf)
+{
+	return crc8(ad74413r_crc8_table, buf, 3, 0);
+}
+
+static void ad74413r_format_reg_write(unsigned int reg, unsigned int val, u8 *buf)
+{
+	buf[0] = reg & 0xff;
+	buf[1] = (val >> 8) & 0xff;
+	buf[2] = val & 0xff;
+	buf[3] = ad74413r_crc(buf);
+}
+
+static int ad74413r_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+	struct device *dev = context;
+	struct spi_device *spi = to_spi_device(dev);
+	struct ad74413r_state *st = spi_get_drvdata(spi);
+	u8 *buf = (u8 *)&st->regmap_tx_buf;
+
+	ad74413r_format_reg_write(reg, val, buf);
+
+	return spi_write(spi, buf, 4);
+}
+
+static int ad74413r_crc_check(struct ad74413r_state *st, u8 *buf)
+{
+	u8 expected_crc = ad74413r_crc(buf);
+
+	if (buf[3] != expected_crc) {
+		dev_err(st->dev, "Bad CRC, data: %02x%02x%02x, expected: %02x, received: %02x\n",
+				buf[0], buf[1], buf[2], expected_crc, buf[3]);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad74413r_reg_read_raw(void *context, unsigned int reg, u8 *buf,
+				 unsigned int count)
+{
+	struct device *dev = context;
+	struct spi_device *spi = to_spi_device(dev);
+	struct ad74413r_state *st = spi_get_drvdata(spi);
+	unsigned int i;
+	int ret;
+
+	ret = ad74413r_reg_write(context, AD74413R_REG_READ_SELECT, reg);
+	if (ret) {
+		dev_err(dev, "Failed to write read select register: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < count; i++, buf += 4) {
+		ret = spi_read(spi, buf, 4);
+		if (ret)
+			return ret;
+
+		ret = ad74413r_crc_check(st, buf);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int ad74413r_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+	struct device *dev = context;
+	struct spi_device *spi = to_spi_device(dev);
+	struct ad74413r_state *st = spi_get_drvdata(spi);
+	u8 *buf = (u8 *)&st->regmap_rx_buf;
+	int ret;
+
+	ret = ad74413r_reg_read_raw(context, reg, buf, 1);
+	if (ret)
+		return ret;
+
+	*val = (buf[1] << 8) | buf[2];
+
+	return 0;
+}
+
+const struct regmap_config ad74413r_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.reg_read = ad74413r_reg_read,
+	.reg_write = ad74413r_reg_write,
+};
+
+static int ad74413r_set_gpo_mode(struct ad74413r_state *st, unsigned int offset, u8 mode)
+{
+	if (mode < GPO_CONFIG_MIN || mode > GPO_CONFIG_MAX) {
+		dev_err(st->dev, "Invalid gpo config select mode\n");
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(st->regmap, AD74413R_REG_GPO_CONFIG_X(offset),
+				  AD74413R_GPO_CONFIG_GPO_SELECT_MASK, mode);
+}
+
+static void ad74413r_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
+{
+	struct ad74413r_state *st = gpiochip_get_data(chip);
+	struct ad74413r_channel_config *channel_config = &st->channel_configs[offset];
+	int ret;
+
+	if (channel_config->gpo_config != GPO_CONFIG_LOGIC) {
+		dev_err(st->dev, "Cannot set gpo %u, not in logic mode", offset);
+		return;
+	}
+
+	ret = ad74413r_set_gpo_mode(st, offset, GPO_CONFIG_LOGIC);
+	if (ret)
+		return;
+
+	regmap_update_bits(st->regmap, AD74413R_REG_GPO_CONFIG_X(offset),
+			   AD74413R_GPO_CONFIG_GPO_DATA_MASK,
+			   val ? AD74413R_GPO_CONFIG_DATA_HIGH
+			       : AD74413R_GPO_CONFIG_DATA_LOW);
+}
+
+static void ad74413r_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
+				       unsigned long *bits)
+{
+	struct ad74413r_state *st = gpiochip_get_data(chip);
+	unsigned int offset = 0;
+	int ret;
+
+	for_each_set_bit_from(offset, mask, AD74413R_CHANNEL_MAX) {
+		struct ad74413r_channel_config *channel_config = &st->channel_configs[offset];
+
+		if (channel_config->gpo_config != GPO_CONFIG_LOGIC) {
+			dev_err(st->dev, "Cannot set gpo %u, not in logic mode\n", offset);
+			continue;
+		}
+
+		ret = ad74413r_set_gpo_mode(st, offset, GPO_CONFIG_LOGIC_PARALLEL);
+		if (ret)
+			return;
+	}
+
+	regmap_update_bits(st->regmap, AD74413R_REG_GPO_PAR_DATA, *mask, *bits);
+}
+
+static int ad74413r_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct ad74413r_state *st = gpiochip_get_data(chip);
+	struct ad74413r_channel_config *channel_config = &st->channel_configs[offset];
+	unsigned int status;
+	int ret;
+
+	if (channel_config->gpo_config != GPO_CONFIG_DEBOUNCED_COMPARATOR) {
+		dev_err(st->dev, "Cannot get gpo %u, not in comparator mode\n", offset);
+		return -EINVAL;
+	}
+
+	ret = regmap_read(st->regmap, AD74413R_REG_DIN_COMP_OUT, &status);
+	if (ret)
+		return ret;
+
+	status &= AD74413R_DIN_COMP_OUT_MASK_X(offset);
+	status >>= AD74413R_DIN_COMP_OUT_SHIFT_X(offset);
+
+	return status;
+}
+
+static int ad74413r_set_channel_dac_code(struct ad74413r_state *st, unsigned int channel,
+					 uint16_t dac_code)
+{
+	int ret;
+
+	if (dac_code > AD74413R_DAC_CODE_MAX) {
+		dev_err(st->dev, "Invalid dac code %d\n", dac_code);
+		return -EINVAL;
+	}
+
+	ret = regmap_write(st->regmap, AD74413R_REG_DAC_CODE_X(channel), dac_code);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(st->regmap, AD74413R_REG_CMD_KEY, AD74413R_CMD_KEY_LDAC);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int ad74413r_channel_set_function(struct ad74413r_state *st, unsigned int channel, u8 func)
+{
+	if (func < CH_FUNC_MIN || func > CH_FUNC_MAX) {
+		dev_err(st->dev, "Invalid channel function %d\n", func);
+		return -EINVAL;
+	}
+
+	if (!st->config->hart_support && (func == CH_FUNC_CURRENT_INPUT_EXT_POWER_HART
+		|| func == CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART)) {
+		dev_err(st->dev, "HART function not supported %d\n", func);
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(st->regmap, AD74413R_REG_CH_FUNC_SETUP_X(channel),
+				  AD74413R_CH_FUNC_SETUP_MASK, func);
+}
+
+static int ad74413r_set_adc_conv_seq(struct ad74413r_state *st, unsigned int status)
+{
+	int ret;
+
+	/*
+	 * These bits do not clear when a conversion completes.
+	 * To enable a subsequent conversion, repeat the write to enable the conversion.
+	 */
+	ret = regmap_write_bits(st->regmap, AD74413R_REG_ADC_CONV_CTRL,
+				AD74413R_CONV_SEQ_MASK,
+				FIELD_PREP(AD74413R_CONV_SEQ_MASK, status));
+	if (ret)
+		return ret;
+
+	// Wait 100us before starting conversions
+	usleep_range(100, 120);
+
+	return 0;
+}
+
+static int ad74413r_set_adc_channel_enable(struct ad74413r_state *st, unsigned int channel,
+					   bool status)
+{
+	unsigned int val = status << AD74413R_CH_EN_SHIFT(channel);
+
+	return regmap_update_bits(st->regmap, AD74413R_REG_ADC_CONV_CTRL,
+				  AD74413R_CH_EN_MASK(channel), val);
+}
+
+static int ad74413r_get_adc_range(struct ad74413r_state *st, unsigned int channel,
+				  unsigned int *val)
+{
+	int ret;
+
+	ret = regmap_read(st->regmap, AD74413R_REG_ADC_CONFIG_X(channel), val);
+	if (ret)
+		return ret;
+
+	*val = FIELD_GET(AD74413R_ADC_CONFIG_RANGE_MASK, *val);
+
+	return 0;
+}
+
+static int ad74413r_get_adc_rejection(struct ad74413r_state *st, unsigned int channel,
+				      unsigned int *val)
+{
+	int ret;
+
+	ret = regmap_read(st->regmap, AD74413R_REG_ADC_CONFIG_X(channel), val);
+	if (ret)
+		return ret;
+
+	*val = FIELD_GET(AD74413R_ADC_CONFIG_REJECTION_MASK, *val);
+
+	return 0;
+}
+
+static int ad74413r_set_adc_rejection(struct ad74413r_state *st, unsigned int channel,
+				      unsigned int val)
+{
+	if (!st->config->hart_support && (val == AD74413R_ADC_REJECTION_50_60_HART
+		|| val == AD74413R_ADC_REJECTION_HART)) {
+		dev_err(st->dev, "HART rate not supported %d\n", val);
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(st->regmap, AD74413R_REG_ADC_CONFIG_X(channel),
+				  AD74413R_ADC_CONFIG_REJECTION_MASK,
+				  FIELD_PREP(AD74413R_ADC_CONFIG_REJECTION_MASK, val));
+}
+
+static int ad74413r_get_adc_rate(struct ad74413r_state *st, unsigned int channel, int *val)
+{
+	unsigned int rej;
+	int ret;
+
+	ret = ad74413r_get_adc_rejection(st, channel, &rej);
+	if (ret)
+		return ret;
+
+	switch (rej) {
+	case AD74413R_ADC_REJECTION_50_60:
+		*val = 20;
+		break;
+	case AD74413R_ADC_REJECTION_NONE:
+		*val = 4800;
+		break;
+	case AD74413R_ADC_REJECTION_50_60_HART:
+		*val = 10;
+		break;
+	case AD74413R_ADC_REJECTION_HART:
+		*val = 1200;
+		break;
+	default:
+		dev_err(st->dev, "Channel %u ADC rejection invalid\n", channel);
+		return -EINVAL;
+	}
+
+	return IIO_VAL_INT;
+}
+
+static int ad74413r_set_adc_rate(struct ad74413r_state *st, unsigned int channel, int val)
+{
+	unsigned int rej;
+
+	switch (val) {
+	case 20:
+		rej = AD74413R_ADC_REJECTION_50_60;
+		break;
+	case 4800:
+		rej = AD74413R_ADC_REJECTION_NONE;
+		break;
+	case 10:
+		rej = AD74413R_ADC_REJECTION_50_60_HART;
+		break;
+	case 1200:
+		rej = AD74413R_ADC_REJECTION_HART;
+		break;
+	default:
+		dev_err(st->dev, "Channel %u ADC rate invalid\n", channel);
+		return -EINVAL;
+	}
+
+	return ad74413r_set_adc_rejection(st, channel, rej);
+}
+
+static int ad74413r_get_adc_voltage_range(struct ad74413r_state *st, unsigned int channel,
+					  int *val)
+{
+	unsigned int range;
+	int ret;
+
+	ret = ad74413r_get_adc_range(st, channel, &range);
+	if (ret)
+		return ret;
+
+	switch (range) {
+	case AD74413R_ADC_RANGE_10V:
+		*val = 10000;
+		break;
+	case AD74413R_ADC_RANGE_2P5V_EXT_POW:
+	case AD74413R_ADC_RANGE_2P5V_INT_POW:
+		*val = 2500;
+		break;
+	case AD74413R_ADC_RANGE_5V_BI_DIR:
+		*val = 5000;
+		break;
+	default:
+		dev_err(st->dev, "Channel %u ADC range invalid\n", channel);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad74413r_get_adc_voltage_offset(struct ad74413r_state *st, unsigned int channel,
+					   int *val)
+{
+	unsigned int range;
+	int ret;
+
+	ret = ad74413r_get_adc_range(st, channel, &range);
+	if (ret)
+		return ret;
+
+	switch (range) {
+	case AD74413R_ADC_RANGE_10V:
+	case AD74413R_ADC_RANGE_2P5V_EXT_POW:
+		*val = 0;
+		break;
+	case AD74413R_ADC_RANGE_2P5V_INT_POW:
+	case AD74413R_ADC_RANGE_5V_BI_DIR:
+		*val = -2500;
+		break;
+	default:
+		dev_err(st->dev, "Channel %u ADC range invalid\n", channel);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad74413r_get_input_voltage_scale(struct ad74413r_state *st, unsigned int channel,
+					    int *val, int *val2)
+{
+	int ret;
+
+	ret = ad74413r_get_adc_voltage_range(st, channel, val);
+	if (ret)
+		return ret;
+
+	*val2 = AD74413R_ADC_RESULT_MAX;
+
+	return IIO_VAL_FRACTIONAL;
+}
+
+static int ad74413r_get_input_voltage_offset(struct ad74413r_state *st, unsigned int channel,
+					     int *val, int *val2)
+{
+	unsigned int range;
+	int ret;
+
+	ret = ad74413r_get_adc_range(st, channel, &range);
+	if (ret)
+		return ret;
+
+	switch (range) {
+	case AD74413R_ADC_RANGE_10V:
+	case AD74413R_ADC_RANGE_2P5V_EXT_POW:
+		*val = 0;
+		break;
+	case AD74413R_ADC_RANGE_2P5V_INT_POW:
+		*val = -AD74413R_ADC_RESULT_MAX;
+		break;
+	case AD74413R_ADC_RANGE_5V_BI_DIR:
+		*val = -AD74413R_ADC_RESULT_MAX / 2;
+		break;
+	default:
+		dev_err(st->dev, "Channel %u ADC range invalid\n", channel);
+		return -EINVAL;
+	}
+
+	*val2 = 0;
+
+	return IIO_VAL_INT;
+}
+
+static int ad74413r_get_input_current_scale(struct ad74413r_state *st, unsigned int channel,
+					       int *val, int *val2)
+{
+	int ret;
+
+	ret = ad74413r_get_adc_voltage_range(st, channel, val);
+	if (ret)
+		return ret;
+
+	*val2 = AD74413R_ADC_RESULT_MAX * st->rsense_resistance_ohms;
+
+	return IIO_VAL_FRACTIONAL;
+}
+
+static int ad74413_get_input_current_offset(struct ad74413r_state *st, unsigned int channel,
+					    int *val, int *val2)
+{
+	int range;
+	int offset;
+	int ret;
+
+	ret = ad74413r_get_adc_voltage_range(st, channel, &range);
+	if (ret)
+		return ret;
+
+	ret = ad74413r_get_adc_voltage_offset(st, channel, &offset);
+	if (ret)
+		return ret;
+
+	*val = offset * AD74413R_ADC_RESULT_MAX / range;
+	*val2 = 0;
+
+	return IIO_VAL_INT;
+}
+
+static int ad74413r_get_output_voltage_scale(struct ad74413r_state *st,
+					     int *val, int *val2)
+{
+	*val = 11000;
+	*val2 = AD74413R_DAC_CODE_MAX;
+
+	return IIO_VAL_FRACTIONAL;
+}
+
+static int ad74413r_get_output_current_scale(struct ad74413r_state *st, int *val, int *val2)
+{
+	*val = regulator_get_voltage(st->refin_reg);
+	*val2 = st->rsense_resistance_ohms * AD74413R_DAC_CODE_MAX * 1000;
+
+	return IIO_VAL_FRACTIONAL;
+}
+
+static irqreturn_t ad74413r_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *indio_dev = pf->indio_dev;
+	struct ad74413r_state *st = iio_priv(indio_dev);
+	unsigned int i;
+	int ret;
+
+	mutex_lock(&st->lock);
+
+	ret = spi_sync(st->spi, &st->adc_samples_msg);
+	if (ret)
+		goto out;
+
+	for (i = 0; i < st->adc_active_channels; i++)
+		ad74413r_crc_check(st, (u8 *)&st->adc_samples.rx_buf[i]);
+
+	iio_push_to_buffers_with_timestamp(indio_dev, &st->adc_samples,
+					   iio_get_time_ns(indio_dev));
+
+out:
+	iio_trigger_notify_done(indio_dev->trig);
+
+	mutex_unlock(&st->lock);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ad74413r_adc_data_interrupt(int irq, void *data)
+{
+	struct ad74413r_state *st = data;
+
+	if (iio_buffer_enabled(st->indio_dev))
+		iio_trigger_poll(st->trig);
+	else
+		complete(&st->adc_data_completion);
+
+	return IRQ_HANDLED;
+}
+
+static int ad74413r_get_single_adc_result(struct ad74413r_state *st, unsigned int channel,
+					  int *val)
+{
+	unsigned int uval;
+	int ret;
+
+	ret = iio_device_claim_direct_mode(st->indio_dev);
+	if (ret)
+		return ret;
+
+	reinit_completion(&st->adc_data_completion);
+
+	ret = ad74413r_set_adc_channel_enable(st, channel, true);
+	if (ret)
+		goto out;
+
+	ret = ad74413r_set_adc_conv_seq(st, AD74413R_CONV_SEQ_SINGLE);
+	if (ret)
+		goto out;
+
+	ret = wait_for_completion_timeout(&st->adc_data_completion,
+					  msecs_to_jiffies(AD74413R_ADC_DATA_TIMEOUT));
+	if (!ret) {
+		ret = -ETIMEDOUT;
+		goto out;
+	}
+
+	ret = regmap_read(st->regmap, AD74413R_REG_ADC_RESULT_X(channel), &uval);
+	if (ret)
+		goto out;
+
+	ret = ad74413r_set_adc_conv_seq(st, AD74413R_CONV_SEQ_OFF);
+	if (ret)
+		goto out;
+
+	ret = ad74413r_set_adc_channel_enable(st, channel, false);
+	if (ret)
+		goto out;
+
+	*val = uval;
+	ret = IIO_VAL_INT;
+
+out:
+	iio_device_release_direct_mode(st->indio_dev);
+
+	return ret;
+}
+
+static int ad74413r_get_single_resistance_result(struct ad74413r_state *st, unsigned int channel,
+						 int *val)
+{
+	unsigned int uval;
+	int ret;
+
+	ret = ad74413r_get_single_adc_result(st, channel, &uval);
+	if (ret < 0)
+		return ret;
+
+	if (uval == AD74413R_ADC_RESULT_MAX)
+		*val = 0;
+	else
+		*val = DIV_ROUND_CLOSEST(uval * 2100, AD74413R_ADC_RESULT_MAX - uval);
+
+	return ret;
+}
+
+static int ad74413r_update_scan_mode(struct iio_dev *indio_dev,
+				     const unsigned long *active_scan_mask)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+	struct spi_transfer *xfer;
+	unsigned int channel;
+	int transfer_index = 0;
+	int ret;
+
+	mutex_lock(&st->lock);
+
+	spi_message_init(&st->adc_samples_msg);
+	st->adc_active_channels = 0;
+
+	for (channel = 0; channel < AD74413R_CHANNEL_MAX; channel++) {
+		bool status = test_bit(channel, active_scan_mask);
+		u8 *tx_buf;
+
+		ret = ad74413r_set_adc_channel_enable(st, channel, status);
+		if (ret)
+			goto out;
+
+		if (!status)
+			continue;
+
+		st->adc_active_channels++;
+
+		xfer = &st->adc_samples_xfer[transfer_index];
+
+		if (transfer_index == 0)
+			xfer->rx_buf = NULL;
+		else
+			xfer->rx_buf = &st->adc_samples.rx_buf[transfer_index - 1];
+
+		tx_buf = (u8 *)&st->adc_samples_tx_buf[transfer_index];
+
+		xfer->tx_buf = tx_buf;
+		xfer->len = 4;
+		xfer->cs_change = 1;
+
+		ad74413r_format_reg_write(AD74413R_REG_READ_SELECT,
+					  AD74413R_REG_ADC_RESULT_X(channel),
+					  tx_buf);
+
+		spi_message_add_tail(xfer, &st->adc_samples_msg);
+
+		transfer_index++;
+	}
+
+	if (transfer_index == 0)
+		goto out;
+
+	xfer = &st->adc_samples_xfer[transfer_index];
+
+	xfer->tx_buf = NULL;
+	xfer->rx_buf = &st->adc_samples.rx_buf[transfer_index - 1];
+	xfer->len = 4;
+	xfer->cs_change = 0;
+
+	spi_message_add_tail(xfer, &st->adc_samples_msg);
+
+out:
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int ad74413r_buffer_postenable(struct iio_dev *indio_dev)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+
+	return ad74413r_set_adc_conv_seq(st, AD74413R_CONV_SEQ_CONTINUOUS);
+}
+
+static int ad74413r_buffer_predisable(struct iio_dev *indio_dev)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+
+	return ad74413r_set_adc_conv_seq(st, AD74413R_CONV_SEQ_OFF);
+}
+
+static int ad74413r_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan,
+			     int *val, int *val2, long info)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+	int ret = -EINVAL;
+
+	mutex_lock(&st->lock);
+
+	switch (info) {
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ALTVOLTAGE:
+			if (chan->output)
+				ret = ad74413r_get_output_voltage_scale(st, val, val2);
+			else
+				ret = ad74413r_get_input_voltage_scale(st, chan->channel,
+								       val, val2);
+			break;
+
+		case IIO_CURRENT:
+			if (chan->output)
+				ret = ad74413r_get_output_current_scale(st, val, val2);
+			else
+				ret = ad74413r_get_input_current_scale(st, chan->channel,
+									  val, val2);
+			break;
+		default:
+			break;
+		}
+		break;
+	case IIO_CHAN_INFO_OFFSET:
+		switch (chan->type) {
+		case IIO_ALTVOLTAGE:
+			if (!chan->output)
+				ret = ad74413r_get_input_voltage_offset(st, chan->channel,
+									val, val2);
+			break;
+		case IIO_CURRENT:
+			if (!chan->output)
+				ret = ad74413_get_input_current_offset(st, chan->channel,
+								       val, val2);
+			break;
+		default:
+			break;
+		}
+		break;
+	case IIO_CHAN_INFO_RAW:
+		if (!chan->output)
+			ret = ad74413r_get_single_adc_result(st, chan->channel, val);
+		break;
+	case IIO_CHAN_INFO_PROCESSED:
+		switch (chan->type) {
+		case IIO_RESISTANCE:
+			if (!chan->output)
+				ret = ad74413r_get_single_resistance_result(st, chan->channel,
+									    val);
+			break;
+		default:
+			break;
+		}
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (!chan->output)
+			ret = ad74413r_get_adc_rate(st, chan->channel, val);
+		break;
+	default:
+		break;
+	}
+
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int ad74413r_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan,
+			      int val, int val2, long info)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+	int ret = -EINVAL;
+
+	mutex_lock(&st->lock);
+
+	switch (info) {
+	case IIO_CHAN_INFO_RAW:
+		switch (chan->type) {
+		case IIO_ALTVOLTAGE:
+		case IIO_CURRENT:
+			ret = ad74413r_set_channel_dac_code(st, chan->channel, val);
+			break;
+		default:
+			break;
+		}
+		break;
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (!chan->output)
+			ret = ad74413r_set_adc_rate(st, chan->channel, val);
+		break;
+	default:
+		break;
+	}
+
+	mutex_unlock(&st->lock);
+
+	return ret;
+}
+
+static int ad74413r_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan,
+			      const int **vals, int *type, int *length, long info)
+{
+	struct ad74413r_state *st = iio_priv(indio_dev);
+	int ret = -EINVAL;
+
+	switch (info) {
+	case IIO_CHAN_INFO_SAMP_FREQ:
+		if (st->config->hart_support) {
+			*vals = ad74413r_adc_sampling_rates_hart;
+			*length = ARRAY_SIZE(ad74413r_adc_sampling_rates_hart);
+		} else {
+			*vals = ad74413r_adc_sampling_rates;
+			*length = ARRAY_SIZE(ad74413r_adc_sampling_rates);
+		}
+		*type = IIO_VAL_INT;
+		ret = IIO_AVAIL_LIST;
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static const struct iio_buffer_setup_ops ad74413r_buffer_ops = {
+	.postenable = &ad74413r_buffer_postenable,
+	.predisable = &ad74413r_buffer_predisable,
+};
+
+static const struct iio_trigger_ops ad74413r_trigger_ops = {
+	.validate_device = iio_trigger_validate_own_device,
+};
+
+static const struct iio_info ad74413r_info = {
+	.read_raw = &ad74413r_read_raw,
+	.write_raw = &ad74413r_write_raw,
+	.read_avail = &ad74413r_read_avail,
+	.update_scan_mode = &ad74413r_update_scan_mode,
+};
+
+#define AD74413R_CHANNEL(_type, _output, extra_mask_separate)		\
+		.type = _type,						\
+		.indexed = 1,						\
+		.output = _output,					\
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | extra_mask_separate
+
+#define AD74413R_DAC_CHANNEL(_type, extra_mask_separate)		\
+	{								\
+		AD74413R_CHANNEL(_type, 1, extra_mask_separate),	\
+	}
+
+#define AD74413R_ADC_CHANNEL(_type, extra_mask_separate)					\
+	{											\
+		AD74413R_CHANNEL(_type, 0, extra_mask_separate | BIT(IIO_CHAN_INFO_SAMP_FREQ)),	\
+		.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),		\
+		.scan_type = {									\
+			.sign = 'u',								\
+			.realbits = 16,								\
+			.storagebits = 32,							\
+			.shift = 8,								\
+			.endianness = IIO_BE,							\
+		},										\
+	}
+
+#define AD74413R_ADC_VOLTAGE_CHANNEL					\
+	AD74413R_ADC_CHANNEL(IIO_ALTVOLTAGE, BIT(IIO_CHAN_INFO_SCALE)	\
+			     | BIT(IIO_CHAN_INFO_OFFSET))
+
+#define AD74413R_ADC_CURRENT_CHANNEL					\
+	AD74413R_ADC_CHANNEL(IIO_CURRENT,  BIT(IIO_CHAN_INFO_SCALE)	\
+			     | BIT(IIO_CHAN_INFO_OFFSET))
+
+static struct iio_chan_spec ad74413r_high_impedance_channels[] = {
+	AD74413R_ADC_VOLTAGE_CHANNEL,
+};
+
+static struct iio_chan_spec ad74413r_voltage_output_channels[] = {
+	AD74413R_DAC_CHANNEL(IIO_ALTVOLTAGE, BIT(IIO_CHAN_INFO_SCALE)),
+	AD74413R_ADC_CURRENT_CHANNEL,
+};
+
+static struct iio_chan_spec ad74413r_current_output_channels[] = {
+	AD74413R_DAC_CHANNEL(IIO_CURRENT, BIT(IIO_CHAN_INFO_SCALE)),
+	AD74413R_ADC_VOLTAGE_CHANNEL,
+};
+
+static struct iio_chan_spec ad74413r_voltage_input_channels[] = {
+	AD74413R_ADC_VOLTAGE_CHANNEL,
+};
+
+static struct iio_chan_spec ad74413r_current_input_channels[] = {
+	AD74413R_ADC_CURRENT_CHANNEL,
+};
+
+static struct iio_chan_spec ad74413r_resistance_input_channels[] = {
+	AD74413R_ADC_CHANNEL(IIO_RESISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
+};
+
+static struct iio_chan_spec ad74413r_digital_input_channels[] = {
+	AD74413R_ADC_VOLTAGE_CHANNEL,
+};
+
+static int ad74413r_of_parse_channel_config(struct ad74413r_state *st,
+					    struct device_node *channel_node)
+{
+	struct ad74413r_channel_config *channel_config;
+	u32 index;
+	int ret;
+
+	ret = of_property_read_u32(channel_node, "reg", &index);
+	if (ret) {
+		dev_err(st->dev, "Failed to read channel reg: %d\n", ret);
+		return ret;
+	}
+
+	if (index > AD74413R_CHANNEL_MAX) {
+		dev_err(st->dev, "Channel index %u is too large\n", index);
+		return -EINVAL;
+	}
+
+	channel_config = &st->channel_configs[index];
+	if (channel_config->initialized) {
+		dev_err(st->dev, "Channel %u has already been initialized\n", index);
+		return -EINVAL;
+	}
+
+	channel_config->func = CH_FUNC_HIGH_IMPEDANCE;
+	of_property_read_u32(channel_node, "adi,ch-func", &channel_config->func);
+
+	channel_config->gpo_config = GPO_CONFIG_100K_PULL_DOWN;
+	of_property_read_u32(channel_node, "adi,gpo-config", &channel_config->gpo_config);
+
+	if (channel_config->gpo_config == GPO_CONFIG_LOGIC_PARALLEL) {
+		dev_err(st->dev, "GPO config logic parallel is unsupported\n");
+		return -EINVAL;
+	}
+
+	ret = ad74413r_channel_set_function(st, index, channel_config->func);
+	if (ret)
+		return ret;
+
+	ret = ad74413r_set_gpo_mode(st, index, channel_config->gpo_config);
+	if (ret)
+		return ret;
+
+	channel_config->initialized = true;
+
+	return 0;
+}
+
+static int ad74413r_parse_channel_configs(struct ad74413r_state *st)
+{
+	struct device_node *channel_node = NULL;
+	int ret;
+
+	for_each_available_child_of_node(st->dev->of_node, channel_node) {
+		if (!of_node_name_eq(channel_node, "channel"))
+			continue;
+
+		ret = ad74413r_of_parse_channel_config(st, channel_node);
+		if (ret) {
+			dev_err(st->dev, "Failed to parse channel %s config: %d\n",
+				channel_node->name, ret);
+			goto put_channel_node;
+		}
+	}
+
+put_channel_node:
+	of_node_put(channel_node);
+
+	return ret;
+}
+
+static int ad74413r_get_iio_channels(struct ad74413r_state *st, u8 func,
+				     struct iio_chan_spec **iio_channels, unsigned int *count)
+{
+	switch (func) {
+	case CH_FUNC_HIGH_IMPEDANCE:
+		*iio_channels = ad74413r_high_impedance_channels;
+		*count = ARRAY_SIZE(ad74413r_high_impedance_channels);
+		break;
+	case CH_FUNC_VOLTAGE_OUTPUT:
+		*iio_channels = ad74413r_voltage_output_channels;
+		*count = ARRAY_SIZE(ad74413r_voltage_output_channels);
+		break;
+	case CH_FUNC_CURRENT_OUTPUT:
+		*iio_channels = ad74413r_current_output_channels;
+		*count = ARRAY_SIZE(ad74413r_current_output_channels);
+		break;
+	case CH_FUNC_VOLTAGE_INPUT:
+		*iio_channels = ad74413r_voltage_input_channels;
+		*count = ARRAY_SIZE(ad74413r_voltage_input_channels);
+		break;
+	case CH_FUNC_CURRENT_INPUT_EXT_POWER:
+	case CH_FUNC_CURRENT_INPUT_LOOP_POWER:
+	case CH_FUNC_CURRENT_INPUT_EXT_POWER_HART:
+	case CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART:
+		*iio_channels = ad74413r_current_input_channels;
+		*count = ARRAY_SIZE(ad74413r_current_input_channels);
+		break;
+	case CH_FUNC_RESISTANCE_INPUT:
+		*iio_channels = ad74413r_resistance_input_channels;
+		*count = ARRAY_SIZE(ad74413r_resistance_input_channels);
+		break;
+	case CH_FUNC_DIGITAL_INPUT_LOGIC:
+	case CH_FUNC_DIGITAL_INPUT_LOOP_POWER:
+		*iio_channels = ad74413r_digital_input_channels;
+		*count = ARRAY_SIZE(ad74413r_digital_input_channels);
+		break;
+	default:
+		dev_err(st->dev, "Unhandled channel config function %d\n", func);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ad74413r_count_iio_channels(struct ad74413r_state *st)
+{
+	unsigned int index;
+	int ret;
+
+	st->indio_dev->num_channels = 0;
+
+	for (index = 0; index < AD74413R_CHANNEL_MAX; index++) {
+		struct ad74413r_channel_config *channel_config = &st->channel_configs[index];
+		struct iio_chan_spec *local_channels;
+		unsigned int num_local_channels;
+
+		ret = ad74413r_get_iio_channels(st, channel_config->func, &local_channels,
+						&num_local_channels);
+		if (ret)
+			return ret;
+
+		st->indio_dev->num_channels += num_local_channels;
+	}
+
+	return 0;
+}
+
+static int ad74413r_setup_iio_channels(struct ad74413r_state *st)
+{
+	struct iio_chan_spec *channels;
+	unsigned int index;
+	int ret;
+
+	channels = devm_kcalloc(st->dev, sizeof(*channels),
+				st->indio_dev->num_channels, GFP_KERNEL);
+	if (!channels)
+		return -ENOMEM;
+
+	st->indio_dev->channels = channels;
+
+	for (index = 0; index < AD74413R_CHANNEL_MAX; index++) {
+		struct ad74413r_channel_config *channel_config = &st->channel_configs[index];
+		struct iio_chan_spec *local_channels;
+		unsigned int num_local_channels;
+		unsigned int chan_index;
+
+		ret = ad74413r_get_iio_channels(st, channel_config->func, &local_channels,
+						&num_local_channels);
+		if (ret)
+			return ret;
+
+		memcpy(channels, local_channels, num_local_channels * sizeof(*local_channels));
+
+		for (chan_index = 0; chan_index < num_local_channels; chan_index++) {
+			struct iio_chan_spec *local_channel = &channels[chan_index];
+
+			local_channel->channel = index;
+			if (local_channel->output)
+				local_channel->scan_index = -1;
+			else
+				local_channel->scan_index = index;
+
+		}
+
+		channels += num_local_channels;
+	}
+
+	return 0;
+}
+
+static void ad74413r_regulator_disable(void *regulator)
+{
+	regulator_disable(regulator);
+}
+
+static int ad74413r_probe(struct spi_device *spi)
+{
+	struct ad74413r_state *st;
+	struct iio_dev *indio_dev;
+	unsigned int sillicon_rev_id;
+	const char *name;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
+	if (indio_dev == NULL)
+		return -ENOMEM;
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, st);
+
+	st->spi = spi;
+	st->dev = &spi->dev;
+	st->config = of_device_get_match_data(&spi->dev);
+	st->indio_dev = indio_dev;
+	mutex_init(&st->lock);
+	init_completion(&st->adc_data_completion);
+
+	name = dev_name(st->dev);
+
+	st->regmap = devm_regmap_init(st->dev, NULL, &spi->dev, &ad74413r_regmap_config);
+	if (IS_ERR(st->regmap)) {
+		ret = PTR_ERR(st->regmap);
+		dev_err(st->dev, "Failed to create regmap: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_read(st->regmap, AD74413R_REG_SILLICON_REV, &sillicon_rev_id);
+	if (ret) {
+		dev_err(st->dev, "Failed to read sillicon rev: %d\n", ret);
+		return ret;
+	}
+
+	sillicon_rev_id = FIELD_GET(AD74413R_SILLICON_REV_ID_MASK, sillicon_rev_id);
+	if (sillicon_rev_id != AD74413R_SILLICON_REV_ID_EXPECTED) {
+		dev_err(st->dev, "Read sillicon rev id %d does not match expected rev id %d\n",
+			sillicon_rev_id, AD74413R_SILLICON_REV_ID_EXPECTED);
+		return -EINVAL;
+	}
+
+	st->refin_reg = devm_regulator_get(st->dev, "refin");
+	if (IS_ERR(st->refin_reg)) {
+		dev_err(st->dev, "Failed to get refin regulator: %d\n", ret);
+		return PTR_ERR(st->refin_reg);
+	}
+
+	ret = regulator_enable(st->refin_reg);
+	if (ret) {
+		dev_err(st->dev, "Failed to enable refin regulator: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_add_action_or_reset(st->dev, ad74413r_regulator_disable,
+				       st->refin_reg);
+	if (ret) {
+		dev_err(st->dev, "Failed to add refin regulator disable action: %d\n", ret);
+		return ret;
+	}
+
+	ret = of_property_read_u32(st->dev->of_node, "adi,rsense-resistance-ohms",
+				   &st->rsense_resistance_ohms);
+	if (ret) {
+		dev_err(st->dev, "Failed to get rsense resistance: %d\n", ret);
+		return ret;
+	}
+
+	st->gpiochip.label = name;
+	st->gpiochip.base = -1;
+	st->gpiochip.ngpio = AD74413R_CHANNEL_MAX;
+	st->gpiochip.parent = st->dev;
+	st->gpiochip.can_sleep = true;
+	st->gpiochip.set = ad74413r_gpio_set;
+	st->gpiochip.set_multiple = ad74413r_gpio_set_multiple;
+	st->gpiochip.owner = THIS_MODULE;
+	st->gpiochip.get = ad74413r_gpio_get;
+
+	ret = devm_gpiochip_add_data(st->dev, &st->gpiochip, st);
+	if (ret) {
+		dev_err(st->dev, "Failed to add gpio chip: %d\n", ret);
+		return ret;
+	}
+
+	st->trig = devm_iio_trigger_alloc(st->dev, "%s-dev%d", name, indio_dev->id);
+	if (!st->trig)
+		return -ENOMEM;
+
+	st->trig->ops = &ad74413r_trigger_ops;
+	st->trig->dev.parent = st->dev;
+	iio_trigger_set_drvdata(st->trig, st);
+
+	ret = devm_iio_trigger_register(st->dev, st->trig);
+	if (ret)
+		return ret;
+
+	indio_dev->dev.parent = st->dev;
+	indio_dev->name = name;
+	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+	indio_dev->info = &ad74413r_info;
+	indio_dev->trig = iio_trigger_get(st->trig);
+
+	ret = ad74413r_parse_channel_configs(st);
+	if (ret)
+		return ret;
+
+	ret = ad74413r_count_iio_channels(st);
+	if (ret)
+		return ret;
+
+	ret = ad74413r_setup_iio_channels(st);
+	if (ret) {
+		dev_err(st->dev, "Failed to setup iio channels: %d\n", ret);
+		return ret;
+	}
+
+	ret = ad74413r_set_adc_conv_seq(st, AD74413R_CONV_SEQ_OFF);
+	if (ret)
+		return ret;
+
+	ret = devm_request_irq(st->dev, spi->irq, ad74413r_adc_data_interrupt,
+			       IRQF_TRIGGER_FALLING, name, st);
+	if (ret) {
+		dev_err(st->dev, "Failed to request threaded irq: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_iio_triggered_buffer_setup(st->dev, indio_dev, &iio_pollfunc_store_time,
+					      &ad74413r_trigger_handler, &ad74413r_buffer_ops);
+	if (ret) {
+		dev_err(st->dev, "Failed to setup triggered buffer: %d\n", ret);
+		return ret;
+	}
+
+	return devm_iio_device_register(st->dev, indio_dev);
+}
+
+static int ad74413r_unregister_driver(struct spi_driver *spi)
+{
+	spi_unregister_driver(spi);
+
+	return 0;
+}
+
+static int __init ad74413r_register_driver(struct spi_driver *spi)
+{
+	crc8_populate_msb(ad74413r_crc8_table, AD74413R_CRC_POLYNOMIAL);
+
+	return spi_register_driver(spi);
+}
+
+static const struct ad74413r_config ad74412r_config_data = {
+	.hart_support = false,
+};
+
+static const struct ad74413r_config ad74413r_config_data = {
+	.hart_support = true,
+};
+
+static const struct of_device_id ad74413r_dt_id[] = {
+	{
+		.compatible = "adi,ad74412r",
+		.data = &ad74412r_config_data,
+	},
+	{
+		.compatible = "adi,ad74413r",
+		.data = &ad74413r_config_data,
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, ad74413r_dt_id);
+
+static struct spi_driver ad74413r_driver = {
+	.driver = {
+		   .name = "ad74413r",
+		   .of_match_table = ad74413r_dt_id,
+	},
+	.probe = ad74413r_probe,
+};
+
+module_driver(ad74413r_driver, ad74413r_register_driver, ad74413r_unregister_driver);
+
+MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices AD74413R ADDAC");
+MODULE_LICENSE("GPL v2");
-- 
2.33.0