1// SPDX-License-Identifier: GPL-2.0
2/*
3 * AD5338R, AD5671R, AD5673R, AD5675R, AD5677R, AD5691R, AD5692R, AD5693,
4 * AD5693R, AD5694, AD5694R, AD5695R, AD5696, AD5696R
5 * Digital to analog converters driver
6 *
7 * Copyright 2018 Analog Devices Inc.
8 */
9
10#include "ad5686.h"
11
12#include <linux/module.h>
13#include <linux/i2c.h>
14
15static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
16{
17	struct i2c_client *i2c = to_i2c_client(st->dev);
18	struct i2c_msg msg[2] = {
19		{
20			.addr = i2c->addr,
21			.flags = i2c->flags,
22			.len = 3,
23			.buf = &st->data[0].d8[1],
24		},
25		{
26			.addr = i2c->addr,
27			.flags = i2c->flags | I2C_M_RD,
28			.len = 2,
29			.buf = (char *)&st->data[0].d16,
30		},
31	};
32	int ret;
33
34	st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
35				      AD5686_ADDR(addr) |
36				      0x00);
37
38	ret = i2c_transfer(i2c->adapter, msg, 2);
39	if (ret < 0)
40		return ret;
41
42	return be16_to_cpu(st->data[0].d16);
43}
44
45static int ad5686_i2c_write(struct ad5686_state *st,
46			    u8 cmd, u8 addr, u16 val)
47{
48	struct i2c_client *i2c = to_i2c_client(st->dev);
49	int ret;
50
51	st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
52				      | val);
53
54	ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
55	if (ret < 0)
56		return ret;
57
58	return (ret != 3) ? -EIO : 0;
59}
60
61static int ad5686_i2c_probe(struct i2c_client *i2c)
62{
63	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
64	return ad5686_probe(&i2c->dev, id->driver_data, id->name,
65			    ad5686_i2c_write, ad5686_i2c_read);
66}
67
68static void ad5686_i2c_remove(struct i2c_client *i2c)
69{
70	ad5686_remove(&i2c->dev);
71}
72
73static const struct i2c_device_id ad5686_i2c_id[] = {
74	{"ad5311r", ID_AD5311R},
75	{"ad5337r", ID_AD5337R},
76	{"ad5338r", ID_AD5338R},
77	{"ad5671r", ID_AD5671R},
78	{"ad5673r", ID_AD5673R},
79	{"ad5675r", ID_AD5675R},
80	{"ad5677r", ID_AD5677R},
81	{"ad5691r", ID_AD5691R},
82	{"ad5692r", ID_AD5692R},
83	{"ad5693", ID_AD5693},
84	{"ad5693r", ID_AD5693R},
85	{"ad5694", ID_AD5694},
86	{"ad5694r", ID_AD5694R},
87	{"ad5695r", ID_AD5695R},
88	{"ad5696", ID_AD5696},
89	{"ad5696r", ID_AD5696R},
90	{}
91};
92MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
93
94static const struct of_device_id ad5686_of_match[] = {
95	{ .compatible = "adi,ad5311r" },
96	{ .compatible = "adi,ad5337r" },
97	{ .compatible = "adi,ad5338r" },
98	{ .compatible = "adi,ad5671r" },
99	{ .compatible = "adi,ad5675r" },
100	{ .compatible = "adi,ad5691r" },
101	{ .compatible = "adi,ad5692r" },
102	{ .compatible = "adi,ad5693" },
103	{ .compatible = "adi,ad5693r" },
104	{ .compatible = "adi,ad5694" },
105	{ .compatible = "adi,ad5694r" },
106	{ .compatible = "adi,ad5695r" },
107	{ .compatible = "adi,ad5696" },
108	{ .compatible = "adi,ad5696r" },
109	{}
110};
111MODULE_DEVICE_TABLE(of, ad5686_of_match);
112
113static struct i2c_driver ad5686_i2c_driver = {
114	.driver = {
115		.name = "ad5696",
116		.of_match_table = ad5686_of_match,
117	},
118	.probe = ad5686_i2c_probe,
119	.remove = ad5686_i2c_remove,
120	.id_table = ad5686_i2c_id,
121};
122
123module_i2c_driver(ad5686_i2c_driver);
124
125MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
126MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
127MODULE_LICENSE("GPL v2");
128MODULE_IMPORT_NS(IIO_AD5686);
129