Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
iio: adc: ad7173: add support for additional models
Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2.
Signed-off-by: Dumitru Ceclan <mitrutzceclan@gmail.com>
Link: https://lore.kernel.org/r/20240306110956.13167-4-mitrutzceclan@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by
Dumitru Ceclan
and committed by
Jonathan Cameron
37ae8381
39331052
+80
-6
+80
-6
drivers/iio/adc/ad7173.c
+80
-6
drivers/iio/adc/ad7173.c
···
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// SPDX-License-Identifier: GPL-2.0+
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/*
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-
* AD7172-2/AD7173-8/AD7175-2/AD7176-2 SPI ADC driver
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* AD717x family SPI ADC driver
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*
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* Supported devices:
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* AD7172-2/AD7172-4/AD7173-8/AD7175-2
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* AD7175-8/AD7176-2/AD7177-2
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*
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* Copyright (C) 2015, 2024 Analog Devices, Inc.
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*/
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···
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#define AD7172_2_ID 0x00d0
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#define AD7175_ID 0x0cd0
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#define AD7176_ID 0x0c90
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#define AD7175_2_ID 0x0cd0
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#define AD7172_4_ID 0x2050
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#define AD7173_ID 0x30d0
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#define AD7175_8_ID 0x3cd0
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#define AD7177_ID 0x4fd0
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#define AD7173_ID_MASK GENMASK(15, 4)
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#define AD7173_ADC_MODE_REF_EN BIT(15)
···
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#define AD7173_SETUP_REF_SEL_EXT_REF 0x0
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#define AD7173_VOLTAGE_INT_REF_uV 2500000
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#define AD7173_TEMP_SENSIIVITY_uV_per_C 477
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#define AD7177_ODR_START_VALUE 0x07
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#define AD7173_FILTER_ODR0_MASK GENMASK(5, 0)
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#define AD7173_MAX_CONFIGS 8
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enum ad7173_ids {
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ID_AD7172_2,
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ID_AD7172_4,
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ID_AD7173_8,
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ID_AD7175_2,
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ID_AD7175_8,
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ID_AD7176_2,
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ID_AD7177_2,
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};
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struct ad7173_device_info {
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const unsigned int *sinc5_data_rates;
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unsigned int num_sinc5_data_rates;
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unsigned int odr_start_value;
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unsigned int num_channels;
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unsigned int num_configs;
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unsigned int num_inputs;
···
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unsigned int id;
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char *name;
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bool has_temp;
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bool has_int_ref;
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bool has_ref2;
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u8 num_gpios;
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};
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···
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.num_configs = 4,
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.num_gpios = 2,
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.has_temp = true,
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.has_int_ref = true,
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.clock = 2 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7173_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
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},
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[ID_AD7172_4] = {
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.id = AD7172_4_ID,
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.num_inputs = 9,
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.num_channels = 8,
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.num_configs = 8,
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.num_gpios = 4,
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.has_temp = false,
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.has_ref2 = true,
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.clock = 2 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7173_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
···
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.num_configs = 8,
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.num_gpios = 4,
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.has_temp = true,
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.has_int_ref = true,
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.has_ref2 = true,
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.clock = 2 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7173_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
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},
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[ID_AD7175_2] = {
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.name = "ad7175-2",
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.id = AD7175_ID,
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.id = AD7175_2_ID,
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.num_inputs = 5,
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.num_channels = 4,
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.num_configs = 4,
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.num_gpios = 2,
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.has_temp = true,
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.has_int_ref = true,
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.clock = 16 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7175_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
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},
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[ID_AD7175_8] = {
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.id = AD7175_8_ID,
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.num_inputs = 17,
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.num_channels = 16,
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.num_configs = 8,
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.num_gpios = 4,
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.has_temp = true,
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.has_int_ref = true,
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.has_ref2 = true,
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.clock = 16 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7175_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
···
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.num_configs = 4,
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.num_gpios = 2,
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.has_temp = false,
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.has_int_ref = true,
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.clock = 16 * HZ_PER_MHZ,
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.sinc5_data_rates = ad7175_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
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},
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[ID_AD7177_2] = {
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.id = AD7177_ID,
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.num_inputs = 5,
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.num_channels = 4,
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.num_configs = 4,
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.num_gpios = 2,
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.has_temp = true,
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.has_int_ref = true,
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.clock = 16 * HZ_PER_MHZ,
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.odr_start_value = AD7177_ODR_START_VALUE,
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.sinc5_data_rates = ad7175_sinc5_data_rates,
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.num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
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},
···
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switch (info) {
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case IIO_CHAN_INFO_SAMP_FREQ:
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freq = val * MILLI + val2 / MILLI;
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for (i = 0; i < st->info->num_sinc5_data_rates - 1; i++)
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for (i = st->info->odr_start_value; i < st->info->num_sinc5_data_rates - 1; i++)
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if (freq >= st->info->sinc5_data_rates[i])
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break;
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···
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else
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ref_sel = ret;
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if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 &&
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st->info->id != AD7173_ID) {
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if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF &&
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!st->info->has_int_ref) {
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fwnode_handle_put(child);
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return dev_err_probe(dev, -EINVAL,
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"External reference 2 is only available on ad7173-8\n");
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"Internal reference is not available on current model.\n");
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}
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if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && !st->info->has_ref2) {
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fwnode_handle_put(child);
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return dev_err_probe(dev, -EINVAL,
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"External reference 2 is not available on current model.\n");
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}
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ret = ad7173_get_ref_voltage_milli(st, ref_sel);
···
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static const struct of_device_id ad7173_of_match[] = {
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{ .compatible = "adi,ad7172-2",
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.data = &ad7173_device_info[ID_AD7172_2]},
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{ .compatible = "adi,ad7172-4",
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.data = &ad7173_device_info[ID_AD7172_4]},
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{ .compatible = "adi,ad7173-8",
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.data = &ad7173_device_info[ID_AD7173_8]},
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{ .compatible = "adi,ad7175-2",
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.data = &ad7173_device_info[ID_AD7175_2]},
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{ .compatible = "adi,ad7175-8",
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.data = &ad7173_device_info[ID_AD7175_8]},
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{ .compatible = "adi,ad7176-2",
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.data = &ad7173_device_info[ID_AD7176_2]},
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{ .compatible = "adi,ad7177-2",
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.data = &ad7173_device_info[ID_AD7177_2]},
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{ }
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};
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MODULE_DEVICE_TABLE(of, ad7173_of_match);
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static const struct spi_device_id ad7173_id_table[] = {
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{ "ad7172-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_2]},
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{ "ad7172-4", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_4]},
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{ "ad7173-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7173_8]},
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{ "ad7175-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_2]},
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{ "ad7175-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_8]},
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{ "ad7176-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7176_2]},
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{ "ad7177-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7177_2]},
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{ }
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};
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MODULE_DEVICE_TABLE(spi, ad7173_id_table);