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Commit 37ae8381 authored by Dumitru Ceclan's avatar Dumitru Ceclan Committed by Jonathan Cameron
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iio: adc: ad7173: add support for additional models 

Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2.
Signed-off-by: default avatarDumitru Ceclan <mitrutzceclan@gmail.com>
Link: https://lore.kernel.org/r/20240306110956.13167-4-mitrutzceclan@gmail.comSigned-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 39331052
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Showing with 80 additions and 6 deletions
drivers/iio/adc/ad7173.c
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// 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.
*/
......@@ -64,7 +69,11 @@
#define AD7172_2_ID 0x00d0
#define AD7175_ID 0x0cd0
#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)
......@@ -110,20 +119,25 @@
#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 {
const unsigned int *sinc5_data_rates;
unsigned int num_sinc5_data_rates;
unsigned int odr_start_value;
unsigned int num_channels;
unsigned int num_configs;
unsigned int num_inputs;
......@@ -131,6 +145,8 @@ struct ad7173_device_info {
unsigned int id;
char *name;
bool has_temp;
bool has_int_ref;
bool has_ref2;
u8 num_gpios;
};
......@@ -196,6 +212,19 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.num_configs = 4,
.num_gpios = 2,
.has_temp = 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_AD7172_4] = {
.id = AD7172_4_ID,
.num_inputs = 9,
.num_channels = 8,
.num_configs = 8,
.num_gpios = 4,
.has_temp = false,
.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),
......@@ -208,18 +237,34 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.num_configs = 8,
.num_gpios = 4,
.has_temp = 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),
},
[ID_AD7175_2] = {
.name = "ad7175-2",
.id = AD7175_ID,
.id = AD7175_2_ID,
.num_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
.has_temp = true,
.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),
},
[ID_AD7175_8] = {
.id = AD7175_8_ID,
.num_inputs = 17,
.num_channels = 16,
.num_configs = 8,
.num_gpios = 4,
.has_temp = true,
.has_int_ref = true,
.has_ref2 = true,
.clock = 16 * HZ_PER_MHZ,
.sinc5_data_rates = ad7175_sinc5_data_rates,
.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
......@@ -232,7 +277,21 @@ static const struct ad7173_device_info ad7173_device_info[] = {
.num_configs = 4,
.num_gpios = 2,
.has_temp = false,
.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),
},
[ID_AD7177_2] = {
.id = AD7177_ID,
.num_inputs = 5,
.num_channels = 4,
.num_configs = 4,
.num_gpios = 2,
.has_temp = true,
.has_int_ref = 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),
},
......@@ -656,7 +715,7 @@ 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++)
for (i = st->info->odr_start_value; i < st->info->num_sinc5_data_rates - 1; i++)
if (freq >= st->info->sinc5_data_rates[i])
break;
......@@ -908,11 +967,17 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
else
ref_sel = ret;
if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 &&
st->info->id != AD7173_ID) {
if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF &&
!st->info->has_int_ref) {
fwnode_handle_put(child);
return dev_err_probe(dev, -EINVAL,
"Internal reference is not available on current model.\n");
}
if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && !st->info->has_ref2) {
fwnode_handle_put(child);
return dev_err_probe(dev, -EINVAL,
"External reference 2 is only available on ad7173-8\n");
"External reference 2 is not available on current model.\n");
}
ret = ad7173_get_ref_voltage_milli(st, ref_sel);
......@@ -1080,21 +1145,30 @@ 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);
......
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