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 */
write_d8(void * client,u8 val)14 static int write_d8(void *client, u8 val)
15 {
16 return i2c_smbus_write_byte(client, val);
17 }
18
write_r8d8(void * client,u8 reg,u8 val)19 static int write_r8d8(void *client, u8 reg, u8 val)
20 {
21 return i2c_smbus_write_byte_data(client, reg, val);
22 }
23
write_r8d16(void * client,u8 reg,u16 val)24 static int write_r8d16(void *client, u8 reg, u16 val)
25 {
26 return i2c_smbus_write_word_data(client, reg, val);
27 }
28
read_d8(void * client)29 static int read_d8(void *client)
30 {
31 return i2c_smbus_read_byte(client);
32 }
33
read_r8d8(void * client,u8 reg)34 static int read_r8d8(void *client, u8 reg)
35 {
36 return i2c_smbus_read_byte_data(client, reg);
37 }
38
read_r8d16(void * client,u8 reg)39 static int read_r8d16(void *client, u8 reg)
40 {
41 return i2c_smbus_read_word_data(client, reg);
42 }
43
44 static 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
ad_dpot_i2c_probe(struct i2c_client * client)53 static int ad_dpot_i2c_probe(struct i2c_client *client)
54 {
55 const struct i2c_device_id *id = i2c_client_get_device_id(client);
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
ad_dpot_i2c_remove(struct i2c_client * client)70 static void ad_dpot_i2c_remove(struct i2c_client *client)
71 {
72 ad_dpot_remove(&client->dev);
73 }
74
75 static 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 };
103 MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
104
105 static 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
114 module_i2c_driver(ad_dpot_i2c_driver);
115
116 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
117 MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
118 MODULE_LICENSE("GPL");
119