1 files changed, 465 insertions, 242 deletions
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index 6c4ed10ae580..69de5886474c 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -35,6 +35,7 @@
 #include <linux/units.h>
 
 #include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/trigger_consumer.h>
 #include <linux/iio/triggered_buffer.h>
@@ -102,6 +103,7 @@
 
 #define AD7173_GPIO_PDSW	BIT(14)
 #define AD7173_GPIO_OP_EN2_3	BIT(13)
+#define AD4111_GPIO_GP_OW_EN	BIT(12)
 #define AD7173_GPIO_MUX_IO	BIT(12)
 #define AD7173_GPIO_SYNC_EN	BIT(11)
 #define AD7173_GPIO_ERR_EN	BIT(10)
@@ -149,6 +151,7 @@
 
 #define AD7173_FILTER_ODR0_MASK		GENMASK(5, 0)
 #define AD7173_MAX_CONFIGS		8
+#define AD4111_OW_DET_THRSH_MV		300
 
 #define AD7173_MODE_CAL_INT_ZERO		0x4 /* Internal Zero-Scale Calibration */
 #define AD7173_MODE_CAL_INT_FULL		0x5 /* Internal Full-Scale Calibration */
@@ -171,6 +174,7 @@ struct ad7173_device_info {
 	unsigned int clock;
 	unsigned int id;
 	char *name;
+	const struct ad_sigma_delta_info *sd_info;
 	bool has_current_inputs;
 	bool has_vincom_input;
 	bool has_temp;
@@ -181,15 +185,23 @@ struct ad7173_device_info {
 	bool has_int_ref;
 	bool has_ref2;
 	bool has_internal_fs_calibration;
+	bool has_openwire_det;
 	bool higher_gpio_bits;
 	u8 num_gpios;
 };
 
 struct ad7173_channel_config {
+	/* Openwire detection threshold */
+	unsigned int openwire_thrsh_raw;
+	int openwire_comp_chan;
 	u8 cfg_slot;
 	bool live;
 
-	/* Following fields are used to compare equality. */
+	/*
+	 * Following fields are used to compare equality. If you
+	 * make adaptations in it, you most likely also have to adapt
+	 * ad7173_find_live_config(), too.
+	 */
 	struct_group(config_props,
 		bool bipolar;
 		bool input_buf;
@@ -202,11 +214,11 @@ struct ad7173_channel {
 	unsigned int ain;
 	struct ad7173_channel_config cfg;
 	u8 syscalib_mode;
+	bool openwire_det_en;
 };
 
 struct ad7173_state {
 	struct ad_sigma_delta sd;
-	struct ad_sigma_delta_info sigma_delta_info;
 	const struct ad7173_device_info *info;
 	struct ad7173_channel *channels;
 	struct regulator_bulk_data regulators[3];
@@ -265,228 +277,6 @@ static unsigned int ad4111_current_channel_config[] = {
 	0x18B, /* 12:IIN3+   11:IIN3− */
 };
 
-static const struct ad7173_device_info ad4111_device_info = {
-	.name = "ad4111",
-	.id = AD4111_ID,
-	.num_voltage_in_div = 8,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 8,
-	.num_gpios = 2,
-	.higher_gpio_bits = true,
-	.has_temp = true,
-	.has_vincom_input = true,
-	.has_input_buf = true,
-	.has_current_inputs = true,
-	.has_int_ref = true,
-	.has_internal_fs_calibration = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad4112_device_info = {
-	.name = "ad4112",
-	.id = AD4112_ID,
-	.num_voltage_in_div = 8,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 8,
-	.num_gpios = 2,
-	.higher_gpio_bits = true,
-	.has_vincom_input = true,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_current_inputs = true,
-	.has_int_ref = true,
-	.has_internal_fs_calibration = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad4113_device_info = {
-	.name = "ad4113",
-	.id = AD4113_ID,
-	.num_voltage_in_div = 8,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 8,
-	.num_gpios = 2,
-	.data_reg_only_16bit = true,
-	.higher_gpio_bits = true,
-	.has_vincom_input = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad4114_device_info = {
-	.name = "ad4114",
-	.id = AD4114_ID,
-	.num_voltage_in_div = 16,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 16,
-	.num_gpios = 4,
-	.has_vincom_input = true,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_internal_fs_calibration = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad4115_device_info = {
-	.name = "ad4115",
-	.id = AD4115_ID,
-	.num_voltage_in_div = 16,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 16,
-	.num_gpios = 4,
-	.has_vincom_input = true,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_internal_fs_calibration = true,
-	.clock = 8 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad4115_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad4115_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad4116_device_info = {
-	.name = "ad4116",
-	.id = AD4116_ID,
-	.num_voltage_in_div = 11,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_voltage_in = 16,
-	.num_gpios = 4,
-	.has_vincom_input = true,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_internal_fs_calibration = true,
-	.clock = 4 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad4116_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad4116_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7172_2_device_info = {
-	.name = "ad7172-2",
-	.id = AD7172_2_ID,
-	.num_voltage_in = 5,
-	.num_channels = 4,
-	.num_configs = 4,
-	.num_gpios = 2,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_pow_supply_monitoring = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7172_4_device_info = {
-	.name = "ad7172-4",
-	.id = AD7172_4_ID,
-	.num_voltage_in = 9,
-	.num_channels = 8,
-	.num_configs = 8,
-	.num_gpios = 4,
-	.has_input_buf = true,
-	.has_ref2 = true,
-	.has_pow_supply_monitoring = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7173_8_device_info = {
-	.name = "ad7173-8",
-	.id = AD7173_ID,
-	.num_voltage_in = 17,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_gpios = 4,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_ref2 = true,
-	.clock = 2 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7173_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7175_2_device_info = {
-	.name = "ad7175-2",
-	.id = AD7175_2_ID,
-	.num_voltage_in = 5,
-	.num_channels = 4,
-	.num_configs = 4,
-	.num_gpios = 2,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_pow_supply_monitoring = true,
-	.clock = 16 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7175_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7175_8_device_info = {
-	.name = "ad7175-8",
-	.id = AD7175_8_ID,
-	.num_voltage_in = 17,
-	.num_channels = 16,
-	.num_configs = 8,
-	.num_gpios = 4,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_ref2 = true,
-	.has_pow_supply_monitoring = true,
-	.clock = 16 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7175_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7176_2_device_info = {
-	.name = "ad7176-2",
-	.id = AD7176_ID,
-	.num_voltage_in = 5,
-	.num_channels = 4,
-	.num_configs = 4,
-	.num_gpios = 2,
-	.has_int_ref = true,
-	.clock = 16 * HZ_PER_MHZ,
-	.sinc5_data_rates = ad7175_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
-};
-
-static const struct ad7173_device_info ad7177_2_device_info = {
-	.name = "ad7177-2",
-	.id = AD7177_ID,
-	.num_voltage_in = 5,
-	.num_channels = 4,
-	.num_configs = 4,
-	.num_gpios = 2,
-	.has_temp = true,
-	.has_input_buf = true,
-	.has_int_ref = true,
-	.has_pow_supply_monitoring = true,
-	.clock = 16 * HZ_PER_MHZ,
-	.odr_start_value = AD7177_ODR_START_VALUE,
-	.sinc5_data_rates = ad7175_sinc5_data_rates,
-	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
-};
-
 static const char *const ad7173_ref_sel_str[] = {
 	[AD7173_SETUP_REF_SEL_EXT_REF]    = "vref",
 	[AD7173_SETUP_REF_SEL_EXT_REF2]   = "vref2",
@@ -559,6 +349,9 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev,
 	if (ret)
 		return ret;
 
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
+
 	mode = st->channels[chan->channel].syscalib_mode;
 	if (sys_calib) {
 		if (mode == AD7173_SYSCALIB_ZERO_SCALE)
@@ -569,6 +362,8 @@ static ssize_t ad7173_write_syscalib(struct iio_dev *indio_dev,
 					      chan->address);
 	}
 
+	iio_device_release_direct(indio_dev);
+
 	return ret ? : len;
 }
 
@@ -616,6 +411,76 @@ static int ad7173_calibrate_all(struct ad7173_state *st, struct iio_dev *indio_d
 	return 0;
 }
 
+/*
+ * Associative array of channel pairs for open wire detection
+ * The array is indexed by ain and gives the associated channel pair
+ * to perform the open wire detection with
+ * the channel pair [0] is for non differential and pair [1]
+ * is for differential inputs
+ */
+static int openwire_ain_to_channel_pair[][2][2] = {
+/*	AIN      Single      Differential */
+	[0] = { { 0, 15 },  { 1, 2 }   },
+	[1] = { { 1, 2 },   { 2, 1 }   },
+	[2] = { { 3, 4 },   { 5, 6 }   },
+	[3] = { { 5, 6 },   { 6, 5 }   },
+	[4] = { { 7, 8 },   { 9, 10 }  },
+	[5] = { { 9, 10 },  { 10, 9 }  },
+	[6] = { { 11, 12 }, { 13, 14 } },
+	[7] = { { 13, 14 }, { 14, 13 } },
+};
+
+/*
+ * Openwire detection on ad4111 works by running the same input measurement
+ * on two different channels and compare if the difference between the two
+ * measurements exceeds a certain value (typical 300mV)
+ */
+static int ad4111_openwire_event(struct iio_dev *indio_dev,
+				 const struct iio_chan_spec *chan)
+{
+	struct ad7173_state *st = iio_priv(indio_dev);
+	struct ad7173_channel *adchan = &st->channels[chan->address];
+	struct ad7173_channel_config *cfg = &adchan->cfg;
+	int ret, val1, val2;
+
+	ret = regmap_set_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO,
+			      AD4111_GPIO_GP_OW_EN);
+	if (ret)
+		return ret;
+
+	adchan->cfg.openwire_comp_chan =
+		openwire_ain_to_channel_pair[chan->channel][chan->differential][0];
+
+	ret = ad_sigma_delta_single_conversion(indio_dev, chan, &val1);
+	if (ret < 0) {
+		dev_err(&indio_dev->dev,
+			"Error running ad_sigma_delta single conversion: %d", ret);
+		goto out;
+	}
+
+	adchan->cfg.openwire_comp_chan =
+		openwire_ain_to_channel_pair[chan->channel][chan->differential][1];
+
+	ret = ad_sigma_delta_single_conversion(indio_dev, chan, &val2);
+	if (ret < 0) {
+		dev_err(&indio_dev->dev,
+			"Error running ad_sigma_delta single conversion: %d", ret);
+		goto out;
+	}
+
+	if (abs(val1 - val2) > cfg->openwire_thrsh_raw)
+		iio_push_event(indio_dev,
+			       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, chan->address,
+						    IIO_EV_TYPE_FAULT, IIO_EV_DIR_FAULT_OPENWIRE),
+			       iio_get_time_ns(indio_dev));
+
+out:
+	adchan->cfg.openwire_comp_chan = -1;
+	regmap_clear_bits(st->reg_gpiocon_regmap, AD7173_REG_GPIO,
+			  AD4111_GPIO_GP_OW_EN);
+	return ret;
+}
+
 static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base,
 			     unsigned int offset, unsigned int *reg,
 			     unsigned int *mask)
@@ -712,15 +577,28 @@ static struct ad7173_channel_config *
 ad7173_find_live_config(struct ad7173_state *st, struct ad7173_channel_config *cfg)
 {
 	struct ad7173_channel_config *cfg_aux;
-	ptrdiff_t cmp_size;
 	int i;
 
-	cmp_size = sizeof_field(struct ad7173_channel_config, config_props);
+	/*
+	 * This is just to make sure that the comparison is adapted after
+	 * struct ad7173_channel_config was changed.
+	 */
+	static_assert(sizeof_field(struct ad7173_channel_config, config_props) ==
+		      sizeof(struct {
+				     bool bipolar;
+				     bool input_buf;
+				     u8 odr;
+				     u8 ref_sel;
+			     }));
+
 	for (i = 0; i < st->num_channels; i++) {
 		cfg_aux = &st->channels[i].cfg;
 
 		if (cfg_aux->live &&
-		    !memcmp(&cfg->config_props, &cfg_aux->config_props, cmp_size))
+		    cfg->bipolar == cfg_aux->bipolar &&
+		    cfg->input_buf == cfg_aux->input_buf &&
+		    cfg->odr == cfg_aux->odr &&
+		    cfg->ref_sel == cfg_aux->ref_sel)
 			return cfg_aux;
 	}
 	return NULL;
@@ -813,6 +691,9 @@ static int ad7173_set_channel(struct ad_sigma_delta *sd, unsigned int channel)
 	      FIELD_PREP(AD7173_CH_SETUP_SEL_MASK, st->channels[channel].cfg.cfg_slot) |
 	      st->channels[channel].ain;
 
+	if (st->channels[channel].cfg.openwire_comp_chan >= 0)
+		channel = st->channels[channel].cfg.openwire_comp_chan;
+
 	return ad_sd_write_reg(&st->sd, AD7173_REG_CH(channel), 2, val);
 }
 
@@ -861,21 +742,280 @@ static int ad7173_disable_all(struct ad_sigma_delta *sd)
 
 static int ad7173_disable_one(struct ad_sigma_delta *sd, unsigned int chan)
 {
+	struct ad7173_state *st = ad_sigma_delta_to_ad7173(sd);
+
+	if (st->channels[chan].cfg.openwire_comp_chan >= 0)
+		chan = st->channels[chan].cfg.openwire_comp_chan;
+
 	return ad_sd_write_reg(sd, AD7173_REG_CH(chan), 2, 0);
 }
 
-static const struct ad_sigma_delta_info ad7173_sigma_delta_info = {
+static const struct ad_sigma_delta_info ad7173_sigma_delta_info_4_slots = {
+	.set_channel = ad7173_set_channel,
+	.append_status = ad7173_append_status,
+	.disable_all = ad7173_disable_all,
+	.disable_one = ad7173_disable_one,
+	.set_mode = ad7173_set_mode,
+	.has_registers = true,
+	.has_named_irqs = true,
+	.addr_shift = 0,
+	.read_mask = BIT(6),
+	.status_ch_mask = GENMASK(3, 0),
+	.data_reg = AD7173_REG_DATA,
+	.num_resetclks = 64,
+	.num_slots = 4,
+};
+
+static const struct ad_sigma_delta_info ad7173_sigma_delta_info_8_slots = {
 	.set_channel = ad7173_set_channel,
 	.append_status = ad7173_append_status,
 	.disable_all = ad7173_disable_all,
 	.disable_one = ad7173_disable_one,
 	.set_mode = ad7173_set_mode,
 	.has_registers = true,
+	.has_named_irqs = true,
 	.addr_shift = 0,
 	.read_mask = BIT(6),
 	.status_ch_mask = GENMASK(3, 0),
 	.data_reg = AD7173_REG_DATA,
 	.num_resetclks = 64,
+	.num_slots = 8,
+};
+
+static const struct ad7173_device_info ad4111_device_info = {
+	.name = "ad4111",
+	.id = AD4111_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 8,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 8,
+	.num_gpios = 2,
+	.higher_gpio_bits = true,
+	.has_temp = true,
+	.has_vincom_input = true,
+	.has_input_buf = true,
+	.has_current_inputs = true,
+	.has_int_ref = true,
+	.has_internal_fs_calibration = true,
+	.has_openwire_det = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad4112_device_info = {
+	.name = "ad4112",
+	.id = AD4112_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 8,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 8,
+	.num_gpios = 2,
+	.higher_gpio_bits = true,
+	.has_vincom_input = true,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_current_inputs = true,
+	.has_int_ref = true,
+	.has_internal_fs_calibration = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad4113_device_info = {
+	.name = "ad4113",
+	.id = AD4113_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 8,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 8,
+	.num_gpios = 2,
+	.data_reg_only_16bit = true,
+	.higher_gpio_bits = true,
+	.has_vincom_input = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad4114_device_info = {
+	.name = "ad4114",
+	.id = AD4114_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 16,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 16,
+	.num_gpios = 4,
+	.has_vincom_input = true,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_internal_fs_calibration = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad4115_device_info = {
+	.name = "ad4115",
+	.id = AD4115_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 16,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 16,
+	.num_gpios = 4,
+	.has_vincom_input = true,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_internal_fs_calibration = true,
+	.clock = 8 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad4115_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad4115_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad4116_device_info = {
+	.name = "ad4116",
+	.id = AD4116_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in_div = 11,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_voltage_in = 16,
+	.num_gpios = 4,
+	.has_vincom_input = true,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_internal_fs_calibration = true,
+	.clock = 4 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad4116_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad4116_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7172_2_device_info = {
+	.name = "ad7172-2",
+	.id = AD7172_2_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in = 5,
+	.num_channels = 4,
+	.num_configs = 4,
+	.num_gpios = 2,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_pow_supply_monitoring = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7172_4_device_info = {
+	.name = "ad7172-4",
+	.id = AD7172_4_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in = 9,
+	.num_channels = 8,
+	.num_configs = 8,
+	.num_gpios = 4,
+	.has_input_buf = true,
+	.has_ref2 = true,
+	.has_pow_supply_monitoring = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7173_8_device_info = {
+	.name = "ad7173-8",
+	.id = AD7173_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in = 17,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_gpios = 4,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_ref2 = true,
+	.clock = 2 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7173_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7175_2_device_info = {
+	.name = "ad7175-2",
+	.id = AD7175_2_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in = 5,
+	.num_channels = 4,
+	.num_configs = 4,
+	.num_gpios = 2,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_pow_supply_monitoring = true,
+	.clock = 16 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7175_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7175_8_device_info = {
+	.name = "ad7175-8",
+	.id = AD7175_8_ID,
+	.sd_info = &ad7173_sigma_delta_info_8_slots,
+	.num_voltage_in = 17,
+	.num_channels = 16,
+	.num_configs = 8,
+	.num_gpios = 4,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_ref2 = true,
+	.has_pow_supply_monitoring = true,
+	.clock = 16 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7175_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7176_2_device_info = {
+	.name = "ad7176-2",
+	.id = AD7176_ID,
+	.sd_info = &ad7173_sigma_delta_info_4_slots,
+	.num_voltage_in = 5,
+	.num_channels = 4,
+	.num_configs = 4,
+	.num_gpios = 2,
+	.has_int_ref = true,
+	.clock = 16 * HZ_PER_MHZ,
+	.sinc5_data_rates = ad7175_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+};
+
+static const struct ad7173_device_info ad7177_2_device_info = {
+	.name = "ad7177-2",
+	.id = AD7177_ID,
+	.sd_info = &ad7173_sigma_delta_info_4_slots,
+	.num_voltage_in = 5,
+	.num_channels = 4,
+	.num_configs = 4,
+	.num_gpios = 2,
+	.has_temp = true,
+	.has_input_buf = true,
+	.has_int_ref = true,
+	.has_pow_supply_monitoring = true,
+	.clock = 16 * HZ_PER_MHZ,
+	.odr_start_value = AD7177_ODR_START_VALUE,
+	.sinc5_data_rates = ad7175_sinc5_data_rates,
+	.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
 };
 
 static int ad7173_setup(struct iio_dev *indio_dev)
@@ -969,6 +1109,12 @@ static int ad7173_read_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 
+		if (ch->openwire_det_en) {
+			ret = ad4111_openwire_event(indio_dev, chan);
+			if (ret < 0)
+				return ret;
+		}
+
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 
@@ -1033,11 +1179,10 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
 	struct ad7173_state *st = iio_priv(indio_dev);
 	struct ad7173_channel_config *cfg;
 	unsigned int freq, i;
-	int ret;
+	int ret = 0;
 
-	ret = iio_device_claim_direct_mode(indio_dev);
-	if (ret)
-		return ret;
+	if (!iio_device_claim_direct(indio_dev))
+		return -EBUSY;
 
 	switch (info) {
 	/*
@@ -1071,7 +1216,7 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
 		break;
 	}
 
-	iio_device_release_direct_mode(indio_dev);
+	iio_device_release_direct(indio_dev);
 	return ret;
 }
 
@@ -1113,12 +1258,57 @@ static int ad7173_debug_reg_access(struct iio_dev *indio_dev, unsigned int reg,
 	return ad_sd_write_reg(&st->sd, reg, reg_size, writeval);
 }
 
+static int ad7173_write_event_config(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     enum iio_event_type type,
+				     enum iio_event_direction dir,
+				     bool state)
+{
+	struct ad7173_state *st = iio_priv(indio_dev);
+	struct ad7173_channel *adchan = &st->channels[chan->address];
+
+	switch (type) {
+	case IIO_EV_TYPE_FAULT:
+		adchan->openwire_det_en = state;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int ad7173_read_event_config(struct iio_dev *indio_dev,
+				    const struct iio_chan_spec *chan,
+				    enum iio_event_type type,
+				    enum iio_event_direction dir)
+{
+	struct ad7173_state *st = iio_priv(indio_dev);
+	struct ad7173_channel *adchan = &st->channels[chan->address];
+
+	switch (type) {
+	case IIO_EV_TYPE_FAULT:
+		return adchan->openwire_det_en;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct iio_event_spec ad4111_events[] = {
+	{
+		.type = IIO_EV_TYPE_FAULT,
+		.dir = IIO_EV_DIR_FAULT_OPENWIRE,
+		.mask_separate = BIT(IIO_EV_INFO_VALUE),
+		.mask_shared_by_all = BIT(IIO_EV_INFO_ENABLE),
+	},
+};
+
 static const struct iio_info ad7173_info = {
 	.read_raw = &ad7173_read_raw,
 	.write_raw = &ad7173_write_raw,
 	.debugfs_reg_access = &ad7173_debug_reg_access,
 	.validate_trigger = ad_sd_validate_trigger,
 	.update_scan_mode = ad7173_update_scan_mode,
+	.write_event_config = ad7173_write_event_config,
+	.read_event_config = ad7173_read_event_config,
 };
 
 static const struct iio_scan_type ad4113_scan_type = {
@@ -1322,6 +1512,37 @@ static int ad7173_validate_reference(struct ad7173_state *st, int ref_sel)
 	return 0;
 }
 
+static int ad7173_validate_openwire_ain_inputs(struct ad7173_state *st,
+					       bool differential,
+					       unsigned int ain0,
+					       unsigned int ain1)
+{
+	/*
+	 * If the channel is configured as differential,
+	 * the ad4111 requires specific ains to be used together
+	 */
+	if (differential)
+		return (ain0 % 2) ? (ain0 - 1) == ain1 : (ain0 + 1) == ain1;
+
+	return ain1 == AD4111_VINCOM_INPUT;
+}
+
+static unsigned int ad7173_calc_openwire_thrsh_raw(struct ad7173_state *st,
+						   struct iio_chan_spec *chan,
+						   struct ad7173_channel *chan_st_priv,
+						   unsigned int thrsh_mv) {
+	unsigned int thrsh_raw;
+
+	thrsh_raw =
+		BIT(chan->scan_type.realbits - !!(chan_st_priv->cfg.bipolar))
+		* thrsh_mv
+		/ ad7173_get_ref_voltage_milli(st, chan_st_priv->cfg.ref_sel);
+	if (chan->channel < st->info->num_voltage_in_div)
+		thrsh_raw /= AD4111_DIVIDER_RATIO;
+
+	return thrsh_raw;
+}
+
 static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 {
 	struct ad7173_channel *chans_st_arr, *chan_st_priv;
@@ -1369,6 +1590,7 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 		chan_st_priv->cfg.bipolar = false;
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
 		chan_st_priv->cfg.ref_sel = AD7173_SETUP_REF_SEL_INT_REF;
+		chan_st_priv->cfg.openwire_comp_chan = -1;
 		st->adc_mode |= AD7173_ADC_MODE_REF_EN;
 		if (st->info->data_reg_only_16bit)
 			chan_arr[chan_index].scan_type = ad4113_scan_type;
@@ -1435,6 +1657,7 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 		chan->channel = ain[0];
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
 		chan_st_priv->cfg.odr = 0;
+		chan_st_priv->cfg.openwire_comp_chan = -1;
 
 		chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar");
 		if (chan_st_priv->cfg.bipolar)
@@ -1449,6 +1672,14 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 			chan_st_priv->cfg.input_buf = st->info->has_input_buf;
 			chan->channel2 = ain[1];
 			chan_st_priv->ain = AD7173_CH_ADDRESS(ain[0], ain[1]);
+			if (st->info->has_openwire_det &&
+			    ad7173_validate_openwire_ain_inputs(st, chan->differential, ain[0], ain[1])) {
+				chan->event_spec = ad4111_events;
+				chan->num_event_specs = ARRAY_SIZE(ad4111_events);
+				chan_st_priv->cfg.openwire_thrsh_raw =
+					ad7173_calc_openwire_thrsh_raw(st, chan, chan_st_priv,
+								       AD4111_OW_DET_THRSH_MV);
+			}
 		}
 
 		if (st->info->data_reg_only_16bit)
@@ -1515,12 +1746,6 @@ static int ad7173_fw_parse_device_config(struct iio_dev *indio_dev)
 			return ret;
 	}
 
-	ret = fwnode_irq_get_byname(dev_fwnode(dev), "rdy");
-	if (ret < 0)
-		return dev_err_probe(dev, ret, "Interrupt 'rdy' is required\n");
-
-	st->sigma_delta_info.irq_line = ret;
-
 	return ad7173_fw_parse_channel_config(indio_dev);
 }
 
@@ -1552,9 +1777,7 @@ static int ad7173_probe(struct spi_device *spi)
 	spi->mode = SPI_MODE_3;
 	spi_setup(spi);
 
-	st->sigma_delta_info = ad7173_sigma_delta_info;
-	st->sigma_delta_info.num_slots = st->info->num_configs;
-	ret = ad_sd_init(&st->sd, indio_dev, spi, &st->sigma_delta_info);
+	ret = ad_sd_init(&st->sd, indio_dev, spi, st->info->sd_info);
 	if (ret)
 		return ret;