From: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
Add support for AD4111/AD4112/AD4114/AD4115/AD4116.
The AD411X family encompasses a series of low power, low noise, 24-bit,
sigma-delta analog-to-digital converters that offer a versatile range of
specifications.
This family of ADCs integrates an analog front end suitable for processing
both fully differential and single-ended, bipolar voltage inputs
addressing a wide array of industrial and instrumentation requirements.
- All ADCs have inputs with a precision voltage divider with a division
ratio of 10.
- AD4116 has 5 low level inputs without a voltage divider.
- AD4111 and AD4112 support current inputs (0 mA to 20 mA) using a 50ohm
shunt resistor.
Signed-off-by: Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>
---
drivers/iio/adc/ad7173.c | 316 ++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 288 insertions(+), 28 deletions(-)
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index d66b47e1a186..f049d79380ac 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -1,8 +1,9 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * AD717x family SPI ADC driver
+ * AD717x and AD411x family SPI ADC driver
*
* Supported devices:
+ * AD4111/AD4112/AD4114/AD4115/AD4116
* AD7172-2/AD7172-4/AD7173-8/AD7175-2
* AD7175-8/AD7176-2/AD7177-2
*
@@ -75,7 +76,9 @@
#define AD7176_ID 0x0c90
#define AD7175_2_ID 0x0cd0
#define AD7172_4_ID 0x2050
-#define AD7173_ID 0x30d0
+#define AD7173_AD4111_AD4112_AD4114_ID 0x30d0
+#define AD4116_ID 0x34d0
+#define AD4115_ID 0x38d0
#define AD7175_8_ID 0x3cd0
#define AD7177_ID 0x4fd0
#define AD7173_ID_MASK GENMASK(15, 4)
@@ -106,6 +109,7 @@
#define AD7173_GPO12_DATA(x) BIT((x) + 0)
#define AD7173_GPO23_DATA(x) BIT((x) + 4)
+#define AD4111_GPO01_DATA(x) BIT((x) + 6)
#define AD7173_GPO_DATA(x) ((x) < 2 ? AD7173_GPO12_DATA(x) : AD7173_GPO23_DATA(x))
#define AD7173_INTERFACE_DATA_STAT BIT(6)
@@ -124,11 +128,20 @@
#define AD7173_VOLTAGE_INT_REF_uV 2500000
#define AD7173_TEMP_SENSIIVITY_uV_per_C 477
#define AD7177_ODR_START_VALUE 0x07
+#define AD4111_SHUNT_RESISTOR_OHM 50
+#define AD4111_DIVIDER_RATIO 10
+#define AD411X_VCOM_INPUT 0X10
+#define AD4111_CURRENT_CHAN_CUTOFF 16
#define AD7173_FILTER_ODR0_MASK GENMASK(5, 0)
#define AD7173_MAX_CONFIGS 8
enum ad7173_ids {
+ ID_AD4111,
+ ID_AD4112,
+ ID_AD4114,
+ ID_AD4115,
+ ID_AD4116,
ID_AD7172_2,
ID_AD7172_4,
ID_AD7173_8,
@@ -138,22 +151,44 @@ enum ad7173_ids {
ID_AD7177_2,
};
+enum ad4111_current_channels {
+ AD4111_CURRENT_IN0P_IN0N,
+ AD4111_CURRENT_IN1P_IN1N,
+ AD4111_CURRENT_IN2P_IN2N,
+ AD4111_CURRENT_IN3P_IN3N,
+};
+
+enum ad7173_channel_types {
+ AD7173_CHAN_SINGLE_ENDED,
+ AD7173_CHAN_PSEUDO_DIFFERENTIAL,
+ AD7173_CHAN_DIFFERENTIAL,
+};
+
struct ad7173_device_info {
const unsigned int *sinc5_data_rates;
unsigned int num_sinc5_data_rates;
unsigned int odr_start_value;
+ /*
+ * AD4116 has both inputs with a volage divider and without.
+ * These inputs cannot be mixed in the channel configuration.
+ * Does not include the VCOM input.
+ */
+ unsigned int num_voltage_inputs_with_divider;
unsigned int num_channels;
unsigned int num_configs;
- unsigned int num_inputs;
+ unsigned int num_voltage_inputs;
unsigned int clock;
unsigned int id;
char *name;
+ bool has_current_inputs;
+ bool has_vcom_input;
bool has_temp;
/* ((AVDD1 − AVSS)/5) */
bool has_common_input;
bool has_input_buf;
bool has_int_ref;
bool has_ref2;
+ bool higher_gpio_bits;
u8 num_gpios;
};
@@ -195,6 +230,24 @@ struct ad7173_state {
#endif
};
+static unsigned int ad4115_sinc5_data_rates[] = {
+ 24845000, 24845000, 20725000, 20725000, /* 0-3 */
+ 15564000, 13841000, 10390000, 10390000, /* 4-7 */
+ 4994000, 2499000, 1000000, 500000, /* 8-11 */
+ 395500, 200000, 100000, 59890, /* 12-15 */
+ 49920, 20000, 16660, 10000, /* 16-19 */
+ 5000, 2500, 2500, /* 20-22 */
+};
+
+static unsigned int ad4116_sinc5_data_rates[] = {
+ 12422360, 12422360, 12422360, 12422360, /* 0-3 */
+ 10362690, 10362690, 7782100, 6290530, /* 4-7 */
+ 5194800, 2496900, 1007600, 499900, /* 8-11 */
+ 390600, 200300, 100000, 59750, /* 12-15 */
+ 49840, 20000, 16650, 10000, /* 16-19 */
+ 5000, 2500, 1250, /* 20-22 */
+};
+
static const unsigned int ad7173_sinc5_data_rates[] = {
6211000, 6211000, 6211000, 6211000, 6211000, 6211000, 5181000, 4444000, /* 0-7 */
3115000, 2597000, 1007000, 503800, 381000, 200300, 100500, 59520, /* 8-15 */
@@ -210,14 +263,109 @@ static const unsigned int ad7175_sinc5_data_rates[] = {
5000, /* 20 */
};
+static unsigned int ad4111_current_channel_config[] = {
+ [AD4111_CURRENT_IN0P_IN0N] = 0x1E8,
+ [AD4111_CURRENT_IN1P_IN1N] = 0x1C9,
+ [AD4111_CURRENT_IN2P_IN2N] = 0x1AA,
+ [AD4111_CURRENT_IN3P_IN3N] = 0x18B,
+};
+
static const struct ad7173_device_info ad7173_device_info[] = {
+ [ID_AD4111] = {
+ .name = "ad4111",
+ .id = AD7173_AD4111_AD4112_AD4114_ID,
+ .num_voltage_inputs_with_divider = 8,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_voltage_inputs = 8,
+ .num_gpios = 2,
+ .higher_gpio_bits = true,
+ .has_temp = true,
+ .has_vcom_input = true,
+ .has_input_buf = true,
+ .has_current_inputs = 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),
+ },
+ [ID_AD4112] = {
+ .name = "ad4112",
+ .id = AD7173_AD4111_AD4112_AD4114_ID,
+ .num_voltage_inputs_with_divider = 8,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_voltage_inputs = 8,
+ .num_gpios = 2,
+ .higher_gpio_bits = true,
+ .has_vcom_input = true,
+ .has_temp = true,
+ .has_input_buf = true,
+ .has_current_inputs = 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),
+ },
+ [ID_AD4114] = {
+ .name = "ad4114",
+ .id = AD7173_AD4111_AD4112_AD4114_ID,
+ .num_voltage_inputs_with_divider = 16,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_voltage_inputs = 16,
+ .num_gpios = 4,
+ .higher_gpio_bits = true,
+ .has_vcom_input = true,
+ .has_temp = 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),
+ },
+ [ID_AD4115] = {
+ .name = "ad4115",
+ .id = AD4115_ID,
+ .num_voltage_inputs_with_divider = 16,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_voltage_inputs = 16,
+ .num_gpios = 4,
+ .higher_gpio_bits = true,
+ .has_vcom_input = true,
+ .has_temp = true,
+ .has_input_buf = true,
+ .has_int_ref = true,
+ .clock = 8 * HZ_PER_MHZ,
+ .sinc5_data_rates = ad4115_sinc5_data_rates,
+ .num_sinc5_data_rates = ARRAY_SIZE(ad4115_sinc5_data_rates),
+ },
+ [ID_AD4116] = {
+ .name = "ad4116",
+ .id = AD4116_ID,
+ .num_voltage_inputs_with_divider = 11,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_voltage_inputs = 16,
+ .num_gpios = 4,
+ .higher_gpio_bits = true,
+ .has_vcom_input = true,
+ .has_temp = true,
+ .has_input_buf = true,
+ .has_int_ref = true,
+ .clock = 4 * HZ_PER_MHZ,
+ .sinc5_data_rates = ad4116_sinc5_data_rates,
+ .num_sinc5_data_rates = ARRAY_SIZE(ad4116_sinc5_data_rates),
+ },
[ID_AD7172_2] = {
.name = "ad7172-2",
.id = AD7172_2_ID,
- .num_inputs = 5,
+ .num_voltage_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
+ .higher_gpio_bits = false,
.has_temp = true,
.has_input_buf = true,
.has_int_ref = true,
@@ -229,10 +377,11 @@ static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7172_4] = {
.name = "ad7172-4",
.id = AD7172_4_ID,
- .num_inputs = 9,
+ .num_voltage_inputs = 9,
.num_channels = 8,
.num_configs = 8,
.num_gpios = 4,
+ .higher_gpio_bits = false,
.has_temp = false,
.has_input_buf = true,
.has_ref2 = true,
@@ -243,11 +392,12 @@ static const struct ad7173_device_info ad7173_device_info[] = {
},
[ID_AD7173_8] = {
.name = "ad7173-8",
- .id = AD7173_ID,
- .num_inputs = 17,
+ .id = AD7173_AD4111_AD4112_AD4114_ID,
+ .num_voltage_inputs = 17,
.num_channels = 16,
.num_configs = 8,
.num_gpios = 4,
+ .higher_gpio_bits = false,
.has_temp = true,
.has_input_buf = true,
.has_int_ref = true,
@@ -260,10 +410,11 @@ static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7175_2] = {
.name = "ad7175-2",
.id = AD7175_2_ID,
- .num_inputs = 5,
+ .num_voltage_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
+ .higher_gpio_bits = false,
.has_temp = true,
.has_input_buf = true,
.has_int_ref = true,
@@ -275,10 +426,11 @@ static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7175_8] = {
.name = "ad7175-8",
.id = AD7175_8_ID,
- .num_inputs = 17,
+ .num_voltage_inputs = 17,
.num_channels = 16,
.num_configs = 8,
.num_gpios = 4,
+ .higher_gpio_bits = false,
.has_temp = true,
.has_input_buf = true,
.has_int_ref = true,
@@ -291,10 +443,11 @@ static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7176_2] = {
.name = "ad7176-2",
.id = AD7176_ID,
- .num_inputs = 5,
+ .num_voltage_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
+ .higher_gpio_bits = false,
.has_temp = false,
.has_input_buf = false,
.has_int_ref = true,
@@ -306,10 +459,11 @@ static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7177_2] = {
.name = "ad7177-2",
.id = AD7177_ID,
- .num_inputs = 5,
+ .num_voltage_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
+ .higher_gpio_bits = false,
.has_temp = true,
.has_input_buf = true,
.has_int_ref = true,
@@ -328,6 +482,12 @@ static const char *const ad7173_ref_sel_str[] = {
[AD7173_SETUP_REF_SEL_AVDD1_AVSS] = "avdd",
};
+static const char *const ad7173_channel_types[] = {
+ [AD7173_CHAN_SINGLE_ENDED] = "single-ended",
+ [AD7173_CHAN_PSEUDO_DIFFERENTIAL] = "pseudo-differential",
+ [AD7173_CHAN_DIFFERENTIAL] = "differential",
+};
+
static const char *const ad7173_clk_sel[] = {
"ext-clk", "xtal"
};
@@ -360,6 +520,15 @@ static int ad7173_mask_xlate(struct gpio_regmap *gpio, unsigned int base,
return 0;
}
+static int ad4111_mask_xlate(struct gpio_regmap *gpio, unsigned int base,
+ unsigned int offset, unsigned int *reg,
+ unsigned int *mask)
+{
+ *mask = AD4111_GPO01_DATA(offset);
+ *reg = base;
+ return 0;
+}
+
static void ad7173_gpio_disable(void *data)
{
struct ad7173_state *st = data;
@@ -392,7 +561,10 @@ static int ad7173_gpio_init(struct ad7173_state *st)
gpio_regmap.regmap = st->reg_gpiocon_regmap;
gpio_regmap.ngpio = st->info->num_gpios;
gpio_regmap.reg_set_base = AD7173_REG_GPIO;
- gpio_regmap.reg_mask_xlate = ad7173_mask_xlate;
+ if (st->info->higher_gpio_bits)
+ gpio_regmap.reg_mask_xlate = ad4111_mask_xlate;
+ else
+ gpio_regmap.reg_mask_xlate = ad7173_mask_xlate;
st->gpio_regmap = devm_gpio_regmap_register(dev, &gpio_regmap);
ret = PTR_ERR_OR_ZERO(st->gpio_regmap);
@@ -687,18 +859,33 @@ static int ad7173_read_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- if (chan->type == IIO_TEMP) {
+
+ switch (chan->type) {
+ case IIO_TEMP:
temp = AD7173_VOLTAGE_INT_REF_uV * MILLI;
temp /= AD7173_TEMP_SENSIIVITY_uV_per_C;
*val = temp;
*val2 = chan->scan_type.realbits;
- } else {
+ return IIO_VAL_FRACTIONAL_LOG2;
+ case IIO_VOLTAGE:
*val = ad7173_get_ref_voltage_milli(st, ch->cfg.ref_sel);
*val2 = chan->scan_type.realbits - !!(ch->cfg.bipolar);
+
+ if (chan->channel < st->info->num_voltage_inputs_with_divider)
+ *val *= AD4111_DIVIDER_RATIO;
+ return IIO_VAL_FRACTIONAL_LOG2;
+ case IIO_CURRENT:
+ *val = ad7173_get_ref_voltage_milli(st, ch->cfg.ref_sel);
+ *val /= AD4111_SHUNT_RESISTOR_OHM;
+ *val2 = chan->scan_type.realbits - (ch->cfg.bipolar ? 1 : 0);
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
}
- return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_OFFSET:
- if (chan->type == IIO_TEMP) {
+
+ switch (chan->type) {
+ case IIO_TEMP:
/* 0 Kelvin -> raw sample */
temp = -ABSOLUTE_ZERO_MILLICELSIUS;
temp *= AD7173_TEMP_SENSIIVITY_uV_per_C;
@@ -707,10 +894,14 @@ static int ad7173_read_raw(struct iio_dev *indio_dev,
AD7173_VOLTAGE_INT_REF_uV *
MILLI);
*val = -temp;
- } else {
+ return IIO_VAL_INT;
+ case IIO_VOLTAGE:
+ case IIO_CURRENT:
*val = -BIT(chan->scan_type.realbits - 1);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
}
- return IIO_VAL_INT;
case IIO_CHAN_INFO_SAMP_FREQ:
reg = st->channels[chan->address].cfg.odr;
@@ -926,13 +1117,37 @@ static int ad7173_register_clk_provider(struct iio_dev *indio_dev)
&st->int_clk_hw);
}
+static int ad4111_validate_current_ain(struct ad7173_state *st,
+ unsigned int ain[2])
+{
+ struct device *dev = &st->sd.spi->dev;
+ int i;
+
+ if (!st->info->has_current_inputs)
+ return dev_err_probe(dev, -EINVAL,
+ "Model %s does not support current channels\n",
+ st->info->name);
+
+ for (i = 0; i < ARRAY_SIZE(ad4111_current_channel_config); i++)
+ if (ad4111_current_channel_config[i] == AD7173_CH_ADDRESS(ain[0], ain[1]))
+ return 0;
+
+ return dev_err_probe(dev, -EINVAL,
+ "Current channel configuration invalid (%d, %d).\n",
+ ain[0], ain[1]);
+}
+
static int ad7173_validate_voltage_ain_inputs(struct ad7173_state *st,
unsigned int ain[2])
{
struct device *dev = &st->sd.spi->dev;
+ bool ain_selects_normal_input[] = {
+ ain[0] < st->info->num_voltage_inputs,
+ ain[1] < st->info->num_voltage_inputs
+ };
for (int i = 0; i < 2; i++) {
- if (ain[i] < st->info->num_inputs)
+ if (ain_selects_normal_input[i])
continue;
if (ain[i] == AD7173_AIN_REF_POS || ain[i] == AD7173_AIN_REF_NEG)
@@ -943,11 +1158,27 @@ static int ad7173_validate_voltage_ain_inputs(struct ad7173_state *st,
st->info->has_common_input)
continue;
+ if (st->info->has_vcom_input && ain[i] == AD411X_VCOM_INPUT) {
+ if (ain_selects_normal_input[(i + 1) % 2] &&
+ ain[(i + 1) % 2] >= st->info->num_voltage_inputs_with_divider)
+ return dev_err_probe(dev, -EINVAL,
+ "VCOM must be paired with inputs having divider.\n");
+
+ continue;
+ }
+
return dev_err_probe(dev, -EINVAL,
"Input pin number out of range for pair (%d %d).\n",
ain[0], ain[1]);
}
+ if ((ain_selects_normal_input[0] && ain_selects_normal_input[1]) &&
+ ((ain[0] >= st->info->num_voltage_inputs_with_divider) !=
+ (ain[1] >= st->info->num_voltage_inputs_with_divider)))
+ return dev_err_probe(dev, -EINVAL,
+ "Both inputs must either have a voltage divider or not have: (%d %d).\n",
+ ain[0], ain[1]);
+
return 0;
}
@@ -979,7 +1210,7 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
struct device *dev = indio_dev->dev.parent;
struct iio_chan_spec *chan_arr, *chan;
unsigned int ain[2], chan_index = 0;
- int ref_sel, ret, num_channels;
+ int ref_sel, ret, is_current_chan, num_channels;
num_channels = device_get_child_node_count(dev);
@@ -1032,9 +1263,16 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
if (ret)
return ret;
- ret = ad7173_validate_voltage_ain_inputs(st, ain);
- if (ret)
- return ret;
+ is_current_chan = fwnode_property_read_bool(child, "adi,current-channel");
+ if (is_current_chan) {
+ ret = ad4111_validate_current_ain(st, ain);
+ if (ret)
+ return ret;
+ } else {
+ ret = ad7173_validate_voltage_ain_inputs(st, ain);
+ if (ret)
+ return ret;
+ }
ret = fwnode_property_match_property_string(child,
"adi,reference-select",
@@ -1058,17 +1296,26 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
chan->scan_index = chan_index;
chan->channel = ain[0];
chan->channel2 = ain[1];
- chan->differential = true;
-
chan_st_priv->ain = AD7173_CH_ADDRESS(ain[0], ain[1]);
chan_st_priv->chan_reg = chan_index;
- chan_st_priv->cfg.input_buf = st->info->has_input_buf;
chan_st_priv->cfg.odr = 0;
-
chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar");
+
if (chan_st_priv->cfg.bipolar)
chan->info_mask_separate |= BIT(IIO_CHAN_INFO_OFFSET);
+ if (is_current_chan)
+ chan->type = IIO_CURRENT;
+ else
+ chan_st_priv->cfg.input_buf = st->info->has_input_buf;
+
+ ret = fwnode_property_match_property_string(child,
+ "adi,channel-type",
+ ad7173_channel_types,
+ ARRAY_SIZE(ad7173_channel_types));
+ chan->differential = (ret < 0 || ret == AD7173_CHAN_DIFFERENTIAL)
+ ? true : false;
+
chan_index++;
}
return 0;
@@ -1195,6 +1442,14 @@ static int ad7173_probe(struct spi_device *spi)
}
static const struct of_device_id ad7173_of_match[] = {
+ { .compatible = "ad4111",
+ .data = &ad7173_device_info[ID_AD4111]},
+ { .compatible = "ad4112",
+ .data = &ad7173_device_info[ID_AD4112]},
+ { .compatible = "ad4114",
+ .data = &ad7173_device_info[ID_AD4114]},
+ { .compatible = "ad4115",
+ .data = &ad7173_device_info[ID_AD4115]},
{ .compatible = "adi,ad7172-2",
.data = &ad7173_device_info[ID_AD7172_2]},
{ .compatible = "adi,ad7172-4",
@@ -1214,6 +1469,11 @@ static const struct of_device_id ad7173_of_match[] = {
MODULE_DEVICE_TABLE(of, ad7173_of_match);
static const struct spi_device_id ad7173_id_table[] = {
+ { "ad4111", (kernel_ulong_t)&ad7173_device_info[ID_AD4111]},
+ { "ad4112", (kernel_ulong_t)&ad7173_device_info[ID_AD4112]},
+ { "ad4114", (kernel_ulong_t)&ad7173_device_info[ID_AD4114]},
+ { "ad4115", (kernel_ulong_t)&ad7173_device_info[ID_AD4115]},
+ { "ad4116", (kernel_ulong_t)&ad7173_device_info[ID_AD4116]},
{ "ad7172-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_2]},
{ "ad7172-4", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_4]},
{ "ad7173-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7173_8]},
@@ -1238,5 +1498,5 @@ module_spi_driver(ad7173_driver);
MODULE_IMPORT_NS(IIO_AD_SIGMA_DELTA);
MODULE_AUTHOR("Lars-Peter Clausen <lars@xxxxxxxxx>");
MODULE_AUTHOR("Dumitru Ceclan <dumitru.ceclan@xxxxxxxxxx>");
-MODULE_DESCRIPTION("Analog Devices AD7172/AD7173/AD7175/AD7176 ADC driver");
+MODULE_DESCRIPTION("Analog Devices AD717x and AD411x ADC driver");
MODULE_LICENSE("GPL");
--
2.43.0
