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 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);
139