139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* AD7091R5 Analog to Digital converter driver
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*
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* Copyright 2014-2019 Analog Devices Inc.
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*/
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#include <linux/i2c.h>
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#include <linux/iio/iio.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "ad7091r-base.h"
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static const struct iio_chan_spec ad7091r5_channels_irq[] = {
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AD7091R_CHANNEL(0, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
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AD7091R_CHANNEL(1, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
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AD7091R_CHANNEL(2, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
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AD7091R_CHANNEL(3, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
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};
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static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
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AD7091R_CHANNEL(0, 12, NULL, 0),
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AD7091R_CHANNEL(1, 12, NULL, 0),
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AD7091R_CHANNEL(2, 12, NULL, 0),
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AD7091R_CHANNEL(3, 12, NULL, 0),
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};
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static int ad7091r5_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode)
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{
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int ret, conf;
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switch (mode) {
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case AD7091R_MODE_SAMPLE:
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conf = 0;
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break;
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case AD7091R_MODE_COMMAND:
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conf = AD7091R_REG_CONF_CMD;
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break;
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case AD7091R_MODE_AUTOCYCLE:
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conf = AD7091R_REG_CONF_AUTO;
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break;
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default:
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return -EINVAL;
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}
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ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
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AD7091R_REG_CONF_MODE_MASK, conf);
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if (ret)
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return ret;
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st->mode = mode;
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return 0;
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}
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static unsigned int ad7091r5_reg_result_chan_id(unsigned int val)
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{
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return AD7091R5_REG_RESULT_CH_ID(val);
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}
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static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
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.name = "ad7091r-5",
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.channels = ad7091r5_channels_irq,
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.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
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.vref_mV = 2500,
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.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
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.set_mode = &ad7091r5_set_mode,
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};
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static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
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.name = "ad7091r-5",
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.channels = ad7091r5_channels_noirq,
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.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
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.vref_mV = 2500,
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.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
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.set_mode = &ad7091r5_set_mode,
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};
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static const struct regmap_config ad7091r_regmap_config = {
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.reg_bits = 8,
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.val_bits = 16,
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.writeable_reg = ad7091r_writeable_reg,
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.volatile_reg = ad7091r_volatile_reg,
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};
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static void ad7091r5_regmap_init(struct ad7091r_state *st,
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const struct regmap_config *regmap_conf)
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{
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struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev);
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st->map = devm_regmap_init_i2c(i2c, regmap_conf);
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}
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static struct ad7091r_init_info ad7091r5_init_info = {
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.info_irq = &ad7091r5_chip_info_irq,
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.info_no_irq = &ad7091r5_chip_info_noirq,
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.regmap_config = &ad7091r_regmap_config,
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.init_adc_regmap = &ad7091r5_regmap_init
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};
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static int ad7091r5_i2c_probe(struct i2c_client *i2c)
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{
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const struct ad7091r_init_info *init_info;
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init_info = i2c_get_match_data(i2c);
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if (!init_info)
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return -EINVAL;
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return ad7091r_probe(&i2c->dev, init_info, i2c->irq);
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}
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static const struct of_device_id ad7091r5_dt_ids[] = {
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{ .compatible = "adi,ad7091r5", .data = &ad7091r5_init_info },
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{},
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};
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MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
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static const struct i2c_device_id ad7091r5_i2c_ids[] = {
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{"ad7091r5", (kernel_ulong_t)&ad7091r5_init_info },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
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static struct i2c_driver ad7091r5_driver = {
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.driver = {
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.name = "ad7091r5",
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.of_match_table = ad7091r5_dt_ids,
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},
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.probe = ad7091r5_i2c_probe,
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.id_table = ad7091r5_i2c_ids,
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};
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module_i2c_driver(ad7091r5_driver);
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MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
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MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
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MODULE_LICENSE("GPL v2");
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MODULE_IMPORT_NS(IIO_AD7091R);
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