[mirror_ubuntu-artful-kernel.git] / drivers / mfd / wm831x-i2c.c

/*
 * wm831x-i2c.c  --  I2C access for Wolfson WM831x PMICs
 *
 * Copyright 2009,2010 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>

#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>

static int wm831x_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
	const struct of_device_id *of_id;
	struct wm831x *wm831x;
	enum wm831x_parent type;
	int ret;

	if (i2c->dev.of_node) {
		of_id = of_match_device(wm831x_of_match, &i2c->dev);
		type = (enum wm831x_parent)of_id->data;
	} else {
		type = (enum wm831x_parent)id->driver_data;
	}

	wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
	if (wm831x == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm831x);
	wm831x->dev = &i2c->dev;
	wm831x->type = type;

	wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
	if (IS_ERR(wm831x->regmap)) {
		ret = PTR_ERR(wm831x->regmap);
		dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	if (pdata)
		memcpy(&wm831x->pdata, pdata, sizeof(*pdata));

	return wm831x_device_init(wm831x, i2c->irq);
}

static int wm831x_i2c_remove(struct i2c_client *i2c)
{
	struct wm831x *wm831x = i2c_get_clientdata(i2c);

	wm831x_device_exit(wm831x);

	return 0;
}

static int wm831x_i2c_suspend(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	return wm831x_device_suspend(wm831x);
}

static int wm831x_i2c_poweroff(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	wm831x_device_shutdown(wm831x);

	return 0;
}

static const struct i2c_device_id wm831x_i2c_id[] = {
	{ "wm8310", WM8310 },
	{ "wm8311", WM8311 },
	{ "wm8312", WM8312 },
	{ "wm8320", WM8320 },
	{ "wm8321", WM8321 },
	{ "wm8325", WM8325 },
	{ "wm8326", WM8326 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);

static const struct dev_pm_ops wm831x_pm_ops = {
	.suspend = wm831x_i2c_suspend,
	.poweroff = wm831x_i2c_poweroff,
};

static struct i2c_driver wm831x_i2c_driver = {
	.driver = {
		.name = "wm831x",
		.pm = &wm831x_pm_ops,
		.of_match_table = of_match_ptr(wm831x_of_match),
	},
	.probe = wm831x_i2c_probe,
	.remove = wm831x_i2c_remove,
	.id_table = wm831x_i2c_id,
};

static int __init wm831x_i2c_init(void)
{
	int ret;

	ret = i2c_add_driver(&wm831x_i2c_driver);
	if (ret != 0)
		pr_err("Failed to register wm831x I2C driver: %d\n", ret);

	return ret;
}
subsys_initcall(wm831x_i2c_init);

static void __exit wm831x_i2c_exit(void)
{
	i2c_del_driver(&wm831x_i2c_driver);
}
module_exit(wm831x_i2c_exit);
Commit	Line	Data
e5b48684 MB	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>
1df5981b	21	#include <linux/err.h>
f6dd8449 CK	22	#include <linux/of.h>
f6dd8449 CK	23	#include <linux/of_device.h>
1df5981b	24	#include <linux/regmap.h>
e5b48684 MB	25
	26	#include <linux/mfd/wm831x/core.h>
	27	#include <linux/mfd/wm831x/pdata.h>
	28
e5b48684 MB	29	static int wm831x_i2c_probe(struct i2c_client *i2c,
	30	const struct i2c_device_id *id)
	31	{
f6dd8449 CK	32	struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev);
f6dd8449 CK	33	const struct of_device_id *of_id;
e5b48684	34	struct wm831x *wm831x;
f6dd8449	35	enum wm831x_parent type;
1df5981b	36	int ret;
e5b48684	37
f6dd8449 CK	38	if (i2c->dev.of_node) {
	39	of_id = of_match_device(wm831x_of_match, &i2c->dev);
	40	type = (enum wm831x_parent)of_id->data;
	41	} else {
	42	type = (enum wm831x_parent)id->driver_data;
	43	}
	44
d48cbb74	45	wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL);
e5b48684 MB	46	if (wm831x == NULL)
	47	return -ENOMEM;
	48
	49	i2c_set_clientdata(i2c, wm831x);
	50	wm831x->dev = &i2c->dev;
f6dd8449	51	wm831x->type = type;
1df5981b	52
130a7032	53	wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config);
1df5981b MB	54	if (IS_ERR(wm831x->regmap)) {
	55	ret = PTR_ERR(wm831x->regmap);
	56	dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
	57	ret);
1df5981b MB	58	return ret;
1df5981b MB	59	}
e5b48684	60
f6dd8449 CK	61	if (pdata)
	62	memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
	63
	64	return wm831x_device_init(wm831x, i2c->irq);
e5b48684 MB	65	}
	66
	67	static int wm831x_i2c_remove(struct i2c_client *i2c)
	68	{
	69	struct wm831x *wm831x = i2c_get_clientdata(i2c);
	70
	71	wm831x_device_exit(wm831x);
	72
	73	return 0;
	74	}
	75
c538ddbe	76	static int wm831x_i2c_suspend(struct device *dev)
e5b48684	77	{
c538ddbe	78	struct wm831x *wm831x = dev_get_drvdata(dev);
e5b48684 MB	79
	80	return wm831x_device_suspend(wm831x);
	81	}
	82
b9736a16	83	static int wm831x_i2c_poweroff(struct device *dev)
523d9cfb	84	{
b9736a16	85	struct wm831x *wm831x = dev_get_drvdata(dev);
523d9cfb MB	86
523d9cfb MB	87	wm831x_device_shutdown(wm831x);
b9736a16 MB	88
b9736a16 MB	89	return 0;
523d9cfb MB	90	}
523d9cfb MB	91
e5b48684 MB	92	static const struct i2c_device_id wm831x_i2c_id[] = {
	93	{ "wm8310", WM8310 },
	94	{ "wm8311", WM8311 },
	95	{ "wm8312", WM8312 },
	96	{ "wm8320", WM8320 },
	97	{ "wm8321", WM8321 },
	98	{ "wm8325", WM8325 },
412dc11d	99	{ "wm8326", WM8326 },
e5b48684 MB	100	{ }
	101	};
	102	MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
	103
c538ddbe MB	104	static const struct dev_pm_ops wm831x_pm_ops = {
c538ddbe MB	105	.suspend = wm831x_i2c_suspend,
b9736a16	106	.poweroff = wm831x_i2c_poweroff,
c538ddbe	107	};
e5b48684 MB	108
	109	static struct i2c_driver wm831x_i2c_driver = {
	110	.driver = {
c538ddbe	111	.name = "wm831x",
c538ddbe	112	.pm = &wm831x_pm_ops,
f6dd8449	113	.of_match_table = of_match_ptr(wm831x_of_match),
e5b48684 MB	114	},
	115	.probe = wm831x_i2c_probe,
	116	.remove = wm831x_i2c_remove,
e5b48684 MB	117	.id_table = wm831x_i2c_id,
	118	};
	119
	120	static int __init wm831x_i2c_init(void)
	121	{
	122	int ret;
	123
	124	ret = i2c_add_driver(&wm831x_i2c_driver);
	125	if (ret != 0)
	126	pr_err("Failed to register wm831x I2C driver: %d\n", ret);
	127
	128	return ret;
	129	}
	130	subsys_initcall(wm831x_i2c_init);
	131
	132	static void __exit wm831x_i2c_exit(void)
	133	{
	134	i2c_del_driver(&wm831x_i2c_driver);
	135	}
	136	module_exit(wm831x_i2c_exit);