Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2.
Signed-off-by: Dumitru Ceclan <mitrutzceclan@xxxxxxxxx>
---
drivers/iio/adc/ad7173.c | 82 ++++++++++++++++++++++++++++++++++++----
1 file changed, 74 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index b42fbe28a325..e60ecce20e08 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -1,6 +1,11 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * AD7172-2/AD7173-8/AD7175-2/AD7176-2 SPI ADC driver
+ * AD717x family SPI ADC driver
+ *
+ * Supported devices:
+ * AD7172-2/AD7172-4/AD7173-8/AD7175-2
+ * AD7175-8/AD7176-2/AD7177-2
+ *
* Copyright (C) 2015, 2024 Analog Devices, Inc.
*/
@@ -61,10 +66,13 @@
#define AD7173_AIN_TEMP_POS 17
#define AD7173_AIN_TEMP_NEG 18
-#define AD7172_ID 0x00d0
-#define AD7173_ID 0x30d0
-#define AD7175_ID 0x0cd0
+#define AD7172_2_ID 0x00d0
#define AD7176_ID 0x0c90
+#define AD7175_2_ID 0x0cd0
+#define AD7172_4_ID 0x2050
+#define AD7173_ID 0x30d0
+#define AD7175_8_ID 0x3cd0
+#define AD7177_ID 0x4fd0
#define AD7173_ID_MASK GENMASK(15, 4)
#define AD7173_ADC_MODE_REF_EN BIT(15)
@@ -110,15 +118,19 @@
#define AD7173_SETUP_REF_SEL_EXT_REF 0x0
#define AD7173_VOLTAGE_INT_REF_uV 2500000
#define AD7173_TEMP_SENSIIVITY_uV_per_C 477
+#define AD7177_ODR_START_VALUE 0x07
#define AD7173_FILTER_ODR0_MASK GENMASK(5, 0)
#define AD7173_MAX_CONFIGS 8
enum ad7173_ids {
ID_AD7172_2,
+ ID_AD7172_4,
ID_AD7173_8,
ID_AD7175_2,
+ ID_AD7175_8,
ID_AD7176_2,
+ ID_AD7177_2,
};
struct ad7173_device_info {
@@ -190,7 +202,7 @@ static const unsigned int ad7175_sinc5_data_rates[] = {
static const struct ad7173_device_info ad7173_device_info[] = {
[ID_AD7172_2] = {
.name = "ad7172-2",
- .id = AD7172_ID,
+ .id = AD7172_2_ID,
.num_inputs = 5,
.num_channels = 4,
.num_configs = 4,
@@ -200,6 +212,17 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.sinc5_data_rates = ad7173_sinc5_data_rates,
.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
},
+ [ID_AD7172_4] = {
+ .id = AD7172_4_ID,
+ .num_inputs = 9,
+ .num_channels = 8,
+ .num_configs = 8,
+ .num_gpios = 4,
+ .has_temp = false,
+ .clock = 2 * HZ_PER_MHZ,
+ .sinc5_data_rates = ad7173_sinc5_data_rates,
+ .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+ },
[ID_AD7173_8] = {
.name = "ad7173-8",
.id = AD7173_ID,
@@ -214,7 +237,7 @@ static const struct ad7173_device_info ad7173_device_info[] = {
},
[ID_AD7175_2] = {
.name = "ad7175-2",
- .id = AD7175_ID,
+ .id = AD7175_2_ID,
.num_inputs = 5,
.num_channels = 4,
.num_configs = 4,
@@ -224,6 +247,17 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.sinc5_data_rates = ad7175_sinc5_data_rates,
.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
},
+ [ID_AD7175_8] = {
+ .id = AD7175_8_ID,
+ .num_inputs = 17,
+ .num_channels = 16,
+ .num_configs = 8,
+ .num_gpios = 4,
+ .has_temp = true,
+ .clock = 16 * HZ_PER_MHZ,
+ .sinc5_data_rates = ad7175_sinc5_data_rates,
+ .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+ },
[ID_AD7176_2] = {
.name = "ad7176-2",
.id = AD7176_ID,
@@ -236,6 +270,17 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.sinc5_data_rates = ad7175_sinc5_data_rates,
.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
},
+ [ID_AD7177_2] = {
+ .id = AD7177_ID,
+ .num_inputs = 5,
+ .num_channels = 4,
+ .num_configs = 4,
+ .num_gpios = 2,
+ .has_temp = 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 char *const ad7173_ref_sel_str[] = {
@@ -656,7 +701,12 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
switch (info) {
case IIO_CHAN_INFO_SAMP_FREQ:
freq = val * MILLI + val2 / MILLI;
- for (i = 0; i < st->info->num_sinc5_data_rates - 1; i++)
+ /*
+ * AD7177-2 has the filter values [0-6] marked as reserved
+ * datasheet page 58
+ */
+ i = (st->info->id == AD7177_ID) ? AD7177_ODR_START_VALUE : 0;
+ for (; i < st->info->num_sinc5_data_rates - 1; i++)
if (freq >= st->info->sinc5_data_rates[i])
break;
@@ -908,8 +958,15 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
else
ref_sel = ret;
+ if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF &&
+ st->info->id == AD7172_2_ID) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, -EINVAL,
+ "Internal reference is not available on ad7172-2\n");
+ }
+
if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 &&
- st->info->id != AD7173_ID) {
+ st->info->id != AD7173_ID && st->info->id != AD7172_2_ID) {
fwnode_handle_put(child);
return dev_err_probe(dev, -EINVAL,
"External reference 2 is only available on ad7173-8\n");
@@ -1080,21 +1137,30 @@ static int ad7173_probe(struct spi_device *spi)
static const struct of_device_id ad7173_of_match[] = {
{ .compatible = "adi,ad7172-2",
.data = &ad7173_device_info[ID_AD7172_2]},
+ { .compatible = "adi,ad7172-4",
+ .data = &ad7173_device_info[ID_AD7172_4]},
{ .compatible = "adi,ad7173-8",
.data = &ad7173_device_info[ID_AD7173_8]},
{ .compatible = "adi,ad7175-2",
.data = &ad7173_device_info[ID_AD7175_2]},
+ { .compatible = "adi,ad7175-8",
+ .data = &ad7173_device_info[ID_AD7175_8]},
{ .compatible = "adi,ad7176-2",
.data = &ad7173_device_info[ID_AD7176_2]},
+ { .compatible = "adi,ad7177-2",
+ .data = &ad7173_device_info[ID_AD7177_2]},
{ }
};
MODULE_DEVICE_TABLE(of, ad7173_of_match);
static const struct spi_device_id ad7173_id_table[] = {
{ "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]},
{ "ad7175-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_2]},
+ { "ad7175-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_8]},
{ "ad7176-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7176_2]},
+ { "ad7177-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7177_2]},
{ }
};
MODULE_DEVICE_TABLE(spi, ad7173_id_table);
--
2.43.0
