Commit 37ae8381 authored by Dumitru Ceclan's avatar Dumitru Ceclan Committed by Jonathan Cameron
Browse files

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.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 39331052

drivers/iio/adc/ad7173.c

+80 −6
Original line number Diff line number Diff line 
// 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);