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6c536e4c MH |
1 | /* |
2 | * Driver for the Analog Devices digital potentiometers (I2C bus) | |
3 | * | |
4 | * Copyright (C) 2010 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 | /* ------------------------------------------------------------------------- */ | |
15 | /* I2C bus functions */ | |
16 | static int write_d8(void *client, u8 val) | |
17 | { | |
18 | return i2c_smbus_write_byte(client, val); | |
19 | } | |
20 | ||
21 | static int write_r8d8(void *client, u8 reg, u8 val) | |
22 | { | |
23 | return i2c_smbus_write_byte_data(client, reg, val); | |
24 | } | |
25 | ||
26 | static int write_r8d16(void *client, u8 reg, u16 val) | |
27 | { | |
28 | return i2c_smbus_write_word_data(client, reg, val); | |
29 | } | |
30 | ||
31 | static int read_d8(void *client) | |
32 | { | |
33 | return i2c_smbus_read_byte(client); | |
34 | } | |
35 | ||
36 | static int read_r8d8(void *client, u8 reg) | |
37 | { | |
38 | return i2c_smbus_read_byte_data(client, reg); | |
39 | } | |
40 | ||
41 | static int read_r8d16(void *client, u8 reg) | |
42 | { | |
43 | return i2c_smbus_read_word_data(client, reg); | |
44 | } | |
45 | ||
46 | static const struct ad_dpot_bus_ops bops = { | |
47 | .read_d8 = read_d8, | |
48 | .read_r8d8 = read_r8d8, | |
49 | .read_r8d16 = read_r8d16, | |
50 | .write_d8 = write_d8, | |
51 | .write_r8d8 = write_r8d8, | |
52 | .write_r8d16 = write_r8d16, | |
53 | }; | |
54 | ||
55 | static int __devinit ad_dpot_i2c_probe(struct i2c_client *client, | |
56 | const struct i2c_device_id *id) | |
57 | { | |
58 | struct ad_dpot_bus_data bdata = { | |
59 | .client = client, | |
60 | .bops = &bops, | |
61 | }; | |
62 | ||
63 | struct ad_dpot_id dpot_id = { | |
64 | .name = (char *) &id->name, | |
65 | .devid = id->driver_data, | |
66 | }; | |
67 | ||
68 | if (!i2c_check_functionality(client->adapter, | |
69 | I2C_FUNC_SMBUS_WORD_DATA)) { | |
70 | dev_err(&client->dev, "SMBUS Word Data not Supported\n"); | |
71 | return -EIO; | |
72 | } | |
73 | ||
74 | return ad_dpot_probe(&client->dev, &bdata, &dpot_id); | |
75 | } | |
76 | ||
77 | static int __devexit ad_dpot_i2c_remove(struct i2c_client *client) | |
78 | { | |
79 | return ad_dpot_remove(&client->dev); | |
80 | } | |
81 | ||
82 | static const struct i2c_device_id ad_dpot_id[] = { | |
83 | {"ad5258", AD5258_ID}, | |
84 | {"ad5259", AD5259_ID}, | |
85 | {"ad5251", AD5251_ID}, | |
86 | {"ad5252", AD5252_ID}, | |
87 | {"ad5253", AD5253_ID}, | |
88 | {"ad5254", AD5254_ID}, | |
89 | {"ad5255", AD5255_ID}, | |
e3ae6847 MH |
90 | {"ad5241", AD5241_ID}, |
91 | {"ad5242", AD5242_ID}, | |
92 | {"ad5243", AD5243_ID}, | |
93 | {"ad5245", AD5245_ID}, | |
94 | {"ad5246", AD5246_ID}, | |
95 | {"ad5247", AD5247_ID}, | |
96 | {"ad5248", AD5248_ID}, | |
c74cba61 MH |
97 | {"ad5280", AD5280_ID}, |
98 | {"ad5282", AD5282_ID}, | |
99 | {"adn2860", ADN2860_ID}, | |
59592d0c MH |
100 | {"ad5273", AD5273_ID}, |
101 | {"ad5171", AD5171_ID}, | |
102 | {"ad5170", AD5170_ID}, | |
103 | {"ad5172", AD5172_ID}, | |
104 | {"ad5173", AD5173_ID}, | |
a4bd3949 MH |
105 | {"ad5272", AD5272_ID}, |
106 | {"ad5274", AD5274_ID}, | |
6c536e4c MH |
107 | {} |
108 | }; | |
109 | MODULE_DEVICE_TABLE(i2c, ad_dpot_id); | |
110 | ||
111 | static struct i2c_driver ad_dpot_i2c_driver = { | |
112 | .driver = { | |
113 | .name = "ad_dpot", | |
114 | .owner = THIS_MODULE, | |
115 | }, | |
116 | .probe = ad_dpot_i2c_probe, | |
117 | .remove = __devexit_p(ad_dpot_i2c_remove), | |
118 | .id_table = ad_dpot_id, | |
119 | }; | |
120 | ||
121 | static int __init ad_dpot_i2c_init(void) | |
122 | { | |
123 | return i2c_add_driver(&ad_dpot_i2c_driver); | |
124 | } | |
125 | module_init(ad_dpot_i2c_init); | |
126 | ||
127 | static void __exit ad_dpot_i2c_exit(void) | |
128 | { | |
129 | i2c_del_driver(&ad_dpot_i2c_driver); | |
130 | } | |
131 | module_exit(ad_dpot_i2c_exit); | |
132 | ||
133 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
134 | MODULE_DESCRIPTION("digital potentiometer I2C bus driver"); | |
135 | MODULE_LICENSE("GPL"); | |
136 | MODULE_ALIAS("i2c:ad_dpot"); |