ad7091r5.c

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * AD7091R5 Analog to Digital converter driver
  4 *
  5 * Copyright 2014-2019 Analog Devices Inc.
  6 */
  7
  8#include <linux/i2c.h>
  9#include <linux/iio/iio.h>
 10#include <linux/module.h>
 11#include <linux/regmap.h>
 12
 13#include "ad7091r-base.h"
 14
 15static const struct iio_chan_spec ad7091r5_channels_irq[] = {
 16	AD7091R_CHANNEL(0, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
 17	AD7091R_CHANNEL(1, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
 18	AD7091R_CHANNEL(2, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
 19	AD7091R_CHANNEL(3, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
 20};
 21
 22static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
 23	AD7091R_CHANNEL(0, 12, NULL, 0),
 24	AD7091R_CHANNEL(1, 12, NULL, 0),
 25	AD7091R_CHANNEL(2, 12, NULL, 0),
 26	AD7091R_CHANNEL(3, 12, NULL, 0),
 27};
 28
 29static int ad7091r5_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode)
 30{
 31	int ret, conf;
 32
 33	switch (mode) {
 34	case AD7091R_MODE_SAMPLE:
 35		conf = 0;
 36		break;
 37	case AD7091R_MODE_COMMAND:
 38		conf = AD7091R_REG_CONF_CMD;
 39		break;
 40	case AD7091R_MODE_AUTOCYCLE:
 41		conf = AD7091R_REG_CONF_AUTO;
 42		break;
 43	default:
 44		return -EINVAL;
 45	}
 46
 47	ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
 48				 AD7091R_REG_CONF_MODE_MASK, conf);
 49	if (ret)
 50		return ret;
 51
 52	st->mode = mode;
 53
 54	return 0;
 55}
 56
 57static unsigned int ad7091r5_reg_result_chan_id(unsigned int val)
 58{
 59	return AD7091R5_REG_RESULT_CH_ID(val);
 60}
 61
 62static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
 63	.name = "ad7091r-5",
 64	.channels = ad7091r5_channels_irq,
 65	.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
 66	.vref_mV = 2500,
 67	.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
 68	.set_mode = &ad7091r5_set_mode,
 69};
 70
 71static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
 72	.name = "ad7091r-5",
 73	.channels = ad7091r5_channels_noirq,
 74	.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
 75	.vref_mV = 2500,
 76	.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
 77	.set_mode = &ad7091r5_set_mode,
 78};
 79
 80static const struct regmap_config ad7091r_regmap_config = {
 81	.reg_bits = 8,
 82	.val_bits = 16,
 83	.writeable_reg = ad7091r_writeable_reg,
 84	.volatile_reg = ad7091r_volatile_reg,
 85};
 86
 87static void ad7091r5_regmap_init(struct ad7091r_state *st,
 88				 const struct regmap_config *regmap_conf)
 89{
 90	struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev);
 91
 92	st->map = devm_regmap_init_i2c(i2c, regmap_conf);
 93}
 94
 95static const struct ad7091r_init_info ad7091r5_init_info = {
 96	.info_irq = &ad7091r5_chip_info_irq,
 97	.info_no_irq = &ad7091r5_chip_info_noirq,
 98	.regmap_config = &ad7091r_regmap_config,
 99	.init_adc_regmap = &ad7091r5_regmap_init
100};
101
102static int ad7091r5_i2c_probe(struct i2c_client *i2c)
103{
104	const struct ad7091r_init_info *init_info;
105
106	init_info = i2c_get_match_data(i2c);
107	if (!init_info)
108		return -EINVAL;
109
110	return ad7091r_probe(&i2c->dev, init_info, i2c->irq);
111}
112
113static const struct of_device_id ad7091r5_dt_ids[] = {
114	{ .compatible = "adi,ad7091r5", .data = &ad7091r5_init_info },
115	{ }
116};
117MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
118
119static const struct i2c_device_id ad7091r5_i2c_ids[] = {
120	{ "ad7091r5", (kernel_ulong_t)&ad7091r5_init_info },
121	{ }
122};
123MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
124
125static struct i2c_driver ad7091r5_driver = {
126	.driver = {
127		.name = "ad7091r5",
128		.of_match_table = ad7091r5_dt_ids,
129	},
130	.probe = ad7091r5_i2c_probe,
131	.id_table = ad7091r5_i2c_ids,
132};
133module_i2c_driver(ad7091r5_driver);
134
135MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
136MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
137MODULE_LICENSE("GPL v2");
138MODULE_IMPORT_NS("IIO_AD7091R");