xref: /linux/drivers/mfd/wm8350-i2c.c (revision c4ee0af3fa0dc65f690fc908f02b8355f9576ea0)
1 /*
2  * wm8350-i2c.c  --  Generic I2C driver for Wolfson WM8350 PMIC
3  *
4  * Copyright 2007, 2008 Wolfson Microelectronics PLC.
5  *
6  * Author: Liam Girdwood
7  *         linux@wolfsonmicro.com
8  *
9  *  This program is free software; you can redistribute  it and/or modify it
10  *  under  the terms of  the GNU General  Public License as published by the
11  *  Free Software Foundation;  either version 2 of the  License, or (at your
12  *  option) any later version.
13  *
14  */
15 
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/err.h>
19 #include <linux/init.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.h>
22 #include <linux/mfd/wm8350/core.h>
23 #include <linux/regmap.h>
24 #include <linux/slab.h>
25 
26 static int wm8350_i2c_probe(struct i2c_client *i2c,
27 			    const struct i2c_device_id *id)
28 {
29 	struct wm8350 *wm8350;
30 	struct wm8350_platform_data *pdata = dev_get_platdata(&i2c->dev);
31 	int ret = 0;
32 
33 	wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
34 	if (wm8350 == NULL)
35 		return -ENOMEM;
36 
37 	wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
38 	if (IS_ERR(wm8350->regmap)) {
39 		ret = PTR_ERR(wm8350->regmap);
40 		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
41 			ret);
42 		return ret;
43 	}
44 
45 	i2c_set_clientdata(i2c, wm8350);
46 	wm8350->dev = &i2c->dev;
47 
48 	return wm8350_device_init(wm8350, i2c->irq, pdata);
49 }
50 
51 static int wm8350_i2c_remove(struct i2c_client *i2c)
52 {
53 	struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
54 
55 	wm8350_device_exit(wm8350);
56 
57 	return 0;
58 }
59 
60 static const struct i2c_device_id wm8350_i2c_id[] = {
61        { "wm8350", 0 },
62        { "wm8351", 0 },
63        { "wm8352", 0 },
64        { }
65 };
66 MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
67 
68 
69 static struct i2c_driver wm8350_i2c_driver = {
70 	.driver = {
71 		   .name = "wm8350",
72 		   .owner = THIS_MODULE,
73 	},
74 	.probe = wm8350_i2c_probe,
75 	.remove = wm8350_i2c_remove,
76 	.id_table = wm8350_i2c_id,
77 };
78 
79 static int __init wm8350_i2c_init(void)
80 {
81 	return i2c_add_driver(&wm8350_i2c_driver);
82 }
83 /* init early so consumer devices can complete system boot */
84 subsys_initcall(wm8350_i2c_init);
85 
86 static void __exit wm8350_i2c_exit(void)
87 {
88 	i2c_del_driver(&wm8350_i2c_driver);
89 }
90 module_exit(wm8350_i2c_exit);
91 
92 MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
93 MODULE_LICENSE("GPL");
94