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Mark Browne5b48682010-10-19 23:57:56 +02001/*
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>
Mark Brown1df59812011-06-10 19:28:10 +010021#include <linux/err.h>
22#include <linux/regmap.h>
Mark Browne5b48682010-10-19 23:57:56 +020023
24#include <linux/mfd/wm831x/core.h>
25#include <linux/mfd/wm831x/pdata.h>
26
Mark Browne5b48682010-10-19 23:57:56 +020027static int wm831x_i2c_probe(struct i2c_client *i2c,
28 const struct i2c_device_id *id)
29{
30 struct wm831x *wm831x;
Mark Brown1df59812011-06-10 19:28:10 +010031 int ret;
Mark Browne5b48682010-10-19 23:57:56 +020032
Mark Brownd48cbb72011-10-25 14:47:40 +020033 wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
Mark Browne5b48682010-10-19 23:57:56 +020034 if (wm831x == NULL)
35 return -ENOMEM;
36
37 i2c_set_clientdata(i2c, wm831x);
38 wm831x->dev = &i2c->dev;
Mark Brown1df59812011-06-10 19:28:10 +010039
Mark Brown130a7032012-01-30 20:08:06 +000040 wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
Mark Brown1df59812011-06-10 19:28:10 +010041 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);
Mark Brown1df59812011-06-10 19:28:10 +010045 return ret;
46 }
Mark Browne5b48682010-10-19 23:57:56 +020047
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
Mark Brownc538ddb2011-01-05 15:12:39 +000060static int wm831x_i2c_suspend(struct device *dev)
Mark Browne5b48682010-10-19 23:57:56 +020061{
Mark Brownc538ddb2011-01-05 15:12:39 +000062 struct wm831x *wm831x = dev_get_drvdata(dev);
Mark Browne5b48682010-10-19 23:57:56 +020063
64 return wm831x_device_suspend(wm831x);
65}
66
Mark Brownb9736a12013-11-08 18:51:25 +000067static int wm831x_i2c_poweroff(struct device *dev)
Mark Brown523d9cf2011-09-15 18:54:53 +020068{
Mark Brownb9736a12013-11-08 18:51:25 +000069 struct wm831x *wm831x = dev_get_drvdata(dev);
Mark Brown523d9cf2011-09-15 18:54:53 +020070
71 wm831x_device_shutdown(wm831x);
Mark Brownb9736a12013-11-08 18:51:25 +000072
73 return 0;
Mark Brown523d9cf2011-09-15 18:54:53 +020074}
75
Mark Browne5b48682010-10-19 23:57:56 +020076static 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 },
Mark Brown412dc112010-11-24 18:01:41 +000083 { "wm8326", WM8326 },
Mark Browne5b48682010-10-19 23:57:56 +020084 { }
85};
86MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
87
Mark Brownc538ddb2011-01-05 15:12:39 +000088static const struct dev_pm_ops wm831x_pm_ops = {
89 .suspend = wm831x_i2c_suspend,
Mark Brownb9736a12013-11-08 18:51:25 +000090 .poweroff = wm831x_i2c_poweroff,
Mark Brownc538ddb2011-01-05 15:12:39 +000091};
Mark Browne5b48682010-10-19 23:57:56 +020092
93static struct i2c_driver wm831x_i2c_driver = {
94 .driver = {
Mark Brownc538ddb2011-01-05 15:12:39 +000095 .name = "wm831x",
96 .owner = THIS_MODULE,
97 .pm = &wm831x_pm_ops,
Mark Browne5b48682010-10-19 23:57:56 +020098 },
99 .probe = wm831x_i2c_probe,
100 .remove = wm831x_i2c_remove,
Mark Browne5b48682010-10-19 23:57:56 +0200101 .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);