[linux-block.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/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 *wm831x;
	int ret;

	wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
	if (wm831x == NULL)
		return -ENOMEM;

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

	wm831x->regmap = 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);
		kfree(wm831x);
		return ret;
	}

	return wm831x_device_init(wm831x, id->driver_data, 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 void wm831x_i2c_shutdown(struct i2c_client *i2c)
{
	struct wm831x *wm831x = i2c_get_clientdata(i2c);

	wm831x_device_shutdown(wm831x);
}

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,
};

static struct i2c_driver wm831x_i2c_driver = {
	.driver = {
		.name = "wm831x",
		.owner = THIS_MODULE,
		.pm = &wm831x_pm_ops,
	},
	.probe = wm831x_i2c_probe,
	.remove = wm831x_i2c_remove,
	.shutdown = wm831x_i2c_shutdown,
	.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 MB	21	#include <linux/err.h>
1df5981b MB	22	#include <linux/regmap.h>
e5b48684 MB	23
	24	#include <linux/mfd/wm831x/core.h>
	25	#include <linux/mfd/wm831x/pdata.h>
	26
e5b48684 MB	27	static int wm831x_i2c_probe(struct i2c_client *i2c,
	28	const struct i2c_device_id *id)
	29	{
	30	struct wm831x *wm831x;
1df5981b	31	int ret;
e5b48684 MB	32
	33	wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
	34	if (wm831x == NULL)
	35	return -ENOMEM;
	36
	37	i2c_set_clientdata(i2c, wm831x);
	38	wm831x->dev = &i2c->dev;
1df5981b MB	39
	40	wm831x->regmap = 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	kfree(wm831x);
	46	return ret;
	47	}
e5b48684 MB	48
	49	return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
	50	}
	51
	52	static int wm831x_i2c_remove(struct i2c_client *i2c)
	53	{
	54	struct wm831x *wm831x = i2c_get_clientdata(i2c);
	55
	56	wm831x_device_exit(wm831x);
	57
	58	return 0;
	59	}
	60
c538ddbe	61	static int wm831x_i2c_suspend(struct device *dev)
e5b48684	62	{
c538ddbe	63	struct wm831x *wm831x = dev_get_drvdata(dev);
e5b48684 MB	64
	65	return wm831x_device_suspend(wm831x);
	66	}
	67
523d9cfb MB	68	static void wm831x_i2c_shutdown(struct i2c_client *i2c)
	69	{
	70	struct wm831x *wm831x = i2c_get_clientdata(i2c);
	71
	72	wm831x_device_shutdown(wm831x);
	73	}
	74
e5b48684 MB	75	static const struct i2c_device_id wm831x_i2c_id[] = {
	76	{ "wm8310", WM8310 },
	77	{ "wm8311", WM8311 },
	78	{ "wm8312", WM8312 },
	79	{ "wm8320", WM8320 },
	80	{ "wm8321", WM8321 },
	81	{ "wm8325", WM8325 },
412dc11d	82	{ "wm8326", WM8326 },
e5b48684 MB	83	{ }
	84	};
	85	MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);
	86
c538ddbe MB	87	static const struct dev_pm_ops wm831x_pm_ops = {
	88	.suspend = wm831x_i2c_suspend,
	89	};
e5b48684 MB	90
	91	static struct i2c_driver wm831x_i2c_driver = {
	92	.driver = {
c538ddbe MB	93	.name = "wm831x",
	94	.owner = THIS_MODULE,
	95	.pm = &wm831x_pm_ops,
e5b48684 MB	96	},
	97	.probe = wm831x_i2c_probe,
	98	.remove = wm831x_i2c_remove,
523d9cfb	99	.shutdown = wm831x_i2c_shutdown,
e5b48684 MB	100	.id_table = wm831x_i2c_id,
	101	};
	102
	103	static int __init wm831x_i2c_init(void)
	104	{
	105	int ret;
	106
	107	ret = i2c_add_driver(&wm831x_i2c_driver);
	108	if (ret != 0)
	109	pr_err("Failed to register wm831x I2C driver: %d\n", ret);
	110
	111	return ret;
	112	}
	113	subsys_initcall(wm831x_i2c_init);
	114
	115	static void __exit wm831x_i2c_exit(void)
	116	{
	117	i2c_del_driver(&wm831x_i2c_driver);
	118	}
	119	module_exit(wm831x_i2c_exit);