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1 | /* |
2 | * wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs |
3 | * |
4 | * Copyright 2009,2010 Wolfson Microelectronics PLC. |
5 | * |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify it |
9 | * under the terms of the GNU General Public License as published by the |
10 | * Free Software Foundation; either version 2 of the License, or (at your |
11 | * option) any later version. |
12 | * |
13 | */ |
14 | |
15 | #include <linux/kernel.h> |
16 | #include <linux/module.h> |
17 | #include <linux/i2c.h> |
18 | #include <linux/delay.h> |
19 | #include <linux/mfd/core.h> |
20 | #include <linux/slab.h> |
21 | #include <linux/err.h> |
22 | #include <linux/regmap.h> |
23 | |
24 | #include <linux/mfd/wm831x/core.h> |
25 | #include <linux/mfd/wm831x/pdata.h> |
26 | |
27 | static int wm831x_i2c_probe(struct i2c_client *i2c, |
28 | const struct i2c_device_id *id) |
29 | { |
30 | struct wm831x *wm831x; |
31 | int ret; |
32 | |
33 | wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL); |
34 | if (wm831x == NULL) |
35 | return -ENOMEM; |
36 | |
37 | i2c_set_clientdata(i2c, wm831x); |
38 | wm831x->dev = &i2c->dev; |
39 | |
40 | wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config); |
41 | if (IS_ERR(wm831x->regmap)) { |
42 | ret = PTR_ERR(wm831x->regmap); |
43 | dev_err(wm831x->dev, "Failed to allocate register map: %d\n", |
44 | ret); |
45 | return ret; |
46 | } |
47 | |
48 | return wm831x_device_init(wm831x, id->driver_data, i2c->irq); |
49 | } |
50 | |
51 | static int wm831x_i2c_remove(struct i2c_client *i2c) |
52 | { |
53 | struct wm831x *wm831x = i2c_get_clientdata(i2c); |
54 | |
55 | wm831x_device_exit(wm831x); |
56 | |
57 | return 0; |
58 | } |
59 | |
60 | static int wm831x_i2c_suspend(struct device *dev) |
61 | { |
62 | struct wm831x *wm831x = dev_get_drvdata(dev); |
63 | |
64 | return wm831x_device_suspend(wm831x); |
65 | } |
66 | |
67 | static void wm831x_i2c_shutdown(struct i2c_client *i2c) |
68 | { |
69 | struct wm831x *wm831x = i2c_get_clientdata(i2c); |
70 | |
71 | wm831x_device_shutdown(wm831x); |
72 | } |
73 | |
74 | static const struct i2c_device_id wm831x_i2c_id[] = { |
75 | { "wm8310", WM8310 }, |
76 | { "wm8311", WM8311 }, |
77 | { "wm8312", WM8312 }, |
78 | { "wm8320", WM8320 }, |
79 | { "wm8321", WM8321 }, |
80 | { "wm8325", WM8325 }, |
81 | { "wm8326", WM8326 }, |
82 | { } |
83 | }; |
84 | MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id); |
85 | |
86 | static const struct dev_pm_ops wm831x_pm_ops = { |
87 | .suspend = wm831x_i2c_suspend, |
88 | }; |
89 | |
90 | static struct i2c_driver wm831x_i2c_driver = { |
91 | .driver = { |
92 | .name = "wm831x", |
93 | .owner = THIS_MODULE, |
94 | .pm = &wm831x_pm_ops, |
95 | }, |
96 | .probe = wm831x_i2c_probe, |
97 | .remove = wm831x_i2c_remove, |
98 | .shutdown = wm831x_i2c_shutdown, |
99 | .id_table = wm831x_i2c_id, |
100 | }; |
101 | |
102 | static int __init wm831x_i2c_init(void) |
103 | { |
104 | int ret; |
105 | |
106 | ret = i2c_add_driver(&wm831x_i2c_driver); |
107 | if (ret != 0) |
108 | pr_err("Failed to register wm831x I2C driver: %d\n", ret); |
109 | |
110 | return ret; |
111 | } |
112 | subsys_initcall(wm831x_i2c_init); |
113 | |
114 | static void __exit wm831x_i2c_exit(void) |
115 | { |
116 | i2c_del_driver(&wm831x_i2c_driver); |
117 | } |
118 | module_exit(wm831x_i2c_exit); |
119 |
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