1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Driver for the Analog Devices digital potentiometers (I2C bus)
4 *
5 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
6 */
7
8#include <linux/i2c.h>
9#include <linux/module.h>
10
11#include "ad525x_dpot.h"
12
13/* I2C bus functions */
14static int write_d8(void *client, u8 val)
15{
16	return i2c_smbus_write_byte(client, val);
17}
18
19static int write_r8d8(void *client, u8 reg, u8 val)
20{
21	return i2c_smbus_write_byte_data(client, reg, val);
22}
23
24static int write_r8d16(void *client, u8 reg, u16 val)
25{
26	return i2c_smbus_write_word_data(client, reg, val);
27}
28
29static int read_d8(void *client)
30{
31	return i2c_smbus_read_byte(client);
32}
33
34static int read_r8d8(void *client, u8 reg)
35{
36	return i2c_smbus_read_byte_data(client, reg);
37}
38
39static int read_r8d16(void *client, u8 reg)
40{
41	return i2c_smbus_read_word_data(client, reg);
42}
43
44static const struct ad_dpot_bus_ops bops = {
45	.read_d8	= read_d8,
46	.read_r8d8	= read_r8d8,
47	.read_r8d16	= read_r8d16,
48	.write_d8	= write_d8,
49	.write_r8d8	= write_r8d8,
50	.write_r8d16	= write_r8d16,
51};
52
53static int ad_dpot_i2c_probe(struct i2c_client *client,
54				      const struct i2c_device_id *id)
55{
56	struct ad_dpot_bus_data bdata = {
57		.client = client,
58		.bops = &bops,
59	};
60
61	if (!i2c_check_functionality(client->adapter,
62				     I2C_FUNC_SMBUS_WORD_DATA)) {
63		dev_err(&client->dev, "SMBUS Word Data not Supported\n");
64		return -EIO;
65	}
66
67	return ad_dpot_probe(&client->dev, &bdata, id->driver_data, id->name);
68}
69
70static int ad_dpot_i2c_remove(struct i2c_client *client)
71{
72	return ad_dpot_remove(&client->dev);
73}
74
75static const struct i2c_device_id ad_dpot_id[] = {
76	{"ad5258", AD5258_ID},
77	{"ad5259", AD5259_ID},
78	{"ad5251", AD5251_ID},
79	{"ad5252", AD5252_ID},
80	{"ad5253", AD5253_ID},
81	{"ad5254", AD5254_ID},
82	{"ad5255", AD5255_ID},
83	{"ad5241", AD5241_ID},
84	{"ad5242", AD5242_ID},
85	{"ad5243", AD5243_ID},
86	{"ad5245", AD5245_ID},
87	{"ad5246", AD5246_ID},
88	{"ad5247", AD5247_ID},
89	{"ad5248", AD5248_ID},
90	{"ad5280", AD5280_ID},
91	{"ad5282", AD5282_ID},
92	{"adn2860", ADN2860_ID},
93	{"ad5273", AD5273_ID},
94	{"ad5161", AD5161_ID},
95	{"ad5171", AD5171_ID},
96	{"ad5170", AD5170_ID},
97	{"ad5172", AD5172_ID},
98	{"ad5173", AD5173_ID},
99	{"ad5272", AD5272_ID},
100	{"ad5274", AD5274_ID},
101	{}
102};
103MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
104
105static struct i2c_driver ad_dpot_i2c_driver = {
106	.driver = {
107		.name	= "ad_dpot",
108	},
109	.probe		= ad_dpot_i2c_probe,
110	.remove		= ad_dpot_i2c_remove,
111	.id_table	= ad_dpot_id,
112};
113
114module_i2c_driver(ad_dpot_i2c_driver);
115
116MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
117MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
118MODULE_LICENSE("GPL");
119