1/*
2 * Driver for the Analog Devices digital potentiometers (I2C bus)
3 *
4 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/i2c.h>
10#include <linux/module.h>
11
12#include "ad525x_dpot.h"
13
14/* I2C bus functions */
15static int write_d8(void *client, u8 val)
16{
17	return i2c_smbus_write_byte(client, val);
18}
19
20static int write_r8d8(void *client, u8 reg, u8 val)
21{
22	return i2c_smbus_write_byte_data(client, reg, val);
23}
24
25static int write_r8d16(void *client, u8 reg, u16 val)
26{
27	return i2c_smbus_write_word_data(client, reg, val);
28}
29
30static int read_d8(void *client)
31{
32	return i2c_smbus_read_byte(client);
33}
34
35static int read_r8d8(void *client, u8 reg)
36{
37	return i2c_smbus_read_byte_data(client, reg);
38}
39
40static int read_r8d16(void *client, u8 reg)
41{
42	return i2c_smbus_read_word_data(client, reg);
43}
44
45static const struct ad_dpot_bus_ops bops = {
46	.read_d8	= read_d8,
47	.read_r8d8	= read_r8d8,
48	.read_r8d16	= read_r8d16,
49	.write_d8	= write_d8,
50	.write_r8d8	= write_r8d8,
51	.write_r8d16	= write_r8d16,
52};
53
54static int ad_dpot_i2c_probe(struct i2c_client *client,
55				      const struct i2c_device_id *id)
56{
57	struct ad_dpot_bus_data bdata = {
58		.client = client,
59		.bops = &bops,
60	};
61
62	if (!i2c_check_functionality(client->adapter,
63				     I2C_FUNC_SMBUS_WORD_DATA)) {
64		dev_err(&client->dev, "SMBUS Word Data not Supported\n");
65		return -EIO;
66	}
67
68	return ad_dpot_probe(&client->dev, &bdata, id->driver_data, id->name);
69}
70
71static int ad_dpot_i2c_remove(struct i2c_client *client)
72{
73	return ad_dpot_remove(&client->dev);
74}
75
76static const struct i2c_device_id ad_dpot_id[] = {
77	{"ad5258", AD5258_ID},
78	{"ad5259", AD5259_ID},
79	{"ad5251", AD5251_ID},
80	{"ad5252", AD5252_ID},
81	{"ad5253", AD5253_ID},
82	{"ad5254", AD5254_ID},
83	{"ad5255", AD5255_ID},
84	{"ad5241", AD5241_ID},
85	{"ad5242", AD5242_ID},
86	{"ad5243", AD5243_ID},
87	{"ad5245", AD5245_ID},
88	{"ad5246", AD5246_ID},
89	{"ad5247", AD5247_ID},
90	{"ad5248", AD5248_ID},
91	{"ad5280", AD5280_ID},
92	{"ad5282", AD5282_ID},
93	{"adn2860", ADN2860_ID},
94	{"ad5273", AD5273_ID},
95	{"ad5161", AD5161_ID},
96	{"ad5171", AD5171_ID},
97	{"ad5170", AD5170_ID},
98	{"ad5172", AD5172_ID},
99	{"ad5173", AD5173_ID},
100	{"ad5272", AD5272_ID},
101	{"ad5274", AD5274_ID},
102	{}
103};
104MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
105
106static struct i2c_driver ad_dpot_i2c_driver = {
107	.driver = {
108		.name	= "ad_dpot",
109		.owner	= THIS_MODULE,
110	},
111	.probe		= ad_dpot_i2c_probe,
112	.remove		= ad_dpot_i2c_remove,
113	.id_table	= ad_dpot_id,
114};
115
116module_i2c_driver(ad_dpot_i2c_driver);
117
118MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
119MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
120MODULE_LICENSE("GPL");
121MODULE_ALIAS("i2c:ad_dpot");
122