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
27static 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
51static 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
60static 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
67static int wm831x_i2c_poweroff(struct device *dev)
68{
69	struct wm831x *wm831x = dev_get_drvdata(dev);
70
71	wm831x_device_shutdown(wm831x);
72
73	return 0;
74}
75
76static const struct i2c_device_id wm831x_i2c_id[] = {
77	{ "wm8310", WM8310 },
78	{ "wm8311", WM8311 },
79	{ "wm8312", WM8312 },
80	{ "wm8320", WM8320 },
81	{ "wm8321", WM8321 },
82	{ "wm8325", WM8325 },
83	{ "wm8326", WM8326 },
84	{ }
85};
86MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
87
88static const struct dev_pm_ops wm831x_pm_ops = {
89	.suspend = wm831x_i2c_suspend,
90	.poweroff = wm831x_i2c_poweroff,
91};
92
93static struct i2c_driver wm831x_i2c_driver = {
94	.driver = {
95		.name = "wm831x",
96		.owner = THIS_MODULE,
97		.pm = &wm831x_pm_ops,
98	},
99	.probe = wm831x_i2c_probe,
100	.remove = wm831x_i2c_remove,
101	.id_table = wm831x_i2c_id,
102};
103
104static int __init wm831x_i2c_init(void)
105{
106	int ret;
107
108	ret = i2c_add_driver(&wm831x_i2c_driver);
109	if (ret != 0)
110		pr_err("Failed to register wm831x I2C driver: %d\n", ret);
111
112	return ret;
113}
114subsys_initcall(wm831x_i2c_init);
115
116static void __exit wm831x_i2c_exit(void)
117{
118	i2c_del_driver(&wm831x_i2c_driver);
119}
120module_exit(wm831x_i2c_exit);
121