tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
26static const struct regmap_config wm8350_regmap = {
27 .reg_bits = 8,
28 .val_bits = 16,
29};
30
31static int wm8350_i2c_probe(struct i2c_client *i2c,
32 const struct i2c_device_id *id)
33{
34 struct wm8350 *wm8350;
35 int ret = 0;
36
37 wm8350 = devm_kzalloc(&i2c->dev, sizeof(struct wm8350), GFP_KERNEL);
38 if (wm8350 == NULL)
39 return -ENOMEM;
40
41 wm8350->regmap = devm_regmap_init_i2c(i2c, &wm8350_regmap);
42 if (IS_ERR(wm8350->regmap)) {
43 ret = PTR_ERR(wm8350->regmap);
44 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
45 ret);
46 return ret;
47 }
48
49 i2c_set_clientdata(i2c, wm8350);
50 wm8350->dev = &i2c->dev;
51
52 return wm8350_device_init(wm8350, i2c->irq, i2c->dev.platform_data);
53}
54
55static int wm8350_i2c_remove(struct i2c_client *i2c)
56{
57 struct wm8350 *wm8350 = i2c_get_clientdata(i2c);
58
59 wm8350_device_exit(wm8350);
60
61 return 0;
62}
63
64static const struct i2c_device_id wm8350_i2c_id[] = {
65 { "wm8350", 0 },
66 { "wm8351", 0 },
67 { "wm8352", 0 },
68 { }
69};
70MODULE_DEVICE_TABLE(i2c, wm8350_i2c_id);
71
72
73static struct i2c_driver wm8350_i2c_driver = {
74 .driver = {
75 .name = "wm8350",
76 .owner = THIS_MODULE,
77 },
78 .probe = wm8350_i2c_probe,
79 .remove = wm8350_i2c_remove,
80 .id_table = wm8350_i2c_id,
81};
82
83static int __init wm8350_i2c_init(void)
84{
85 return i2c_add_driver(&wm8350_i2c_driver);
86}
87/* init early so consumer devices can complete system boot */
88subsys_initcall(wm8350_i2c_init);
89
90static void __exit wm8350_i2c_exit(void)
91{
92 i2c_del_driver(&wm8350_i2c_driver);
93}
94module_exit(wm8350_i2c_exit);
95
96MODULE_DESCRIPTION("I2C support for the WM8350 AudioPlus PMIC");
97MODULE_LICENSE("GPL");