[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / wm831x-spi.c

/*
 * wm831x-spi.c  --  SPI 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/pm.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/err.h>

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

static int __devinit wm831x_spi_probe(struct spi_device *spi)
{
	const struct spi_device_id *id = spi_get_device_id(spi);
	struct wm831x *wm831x;
	enum wm831x_parent type;
	int ret;

	type = (enum wm831x_parent)id->driver_data;

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

	spi->bits_per_word = 16;
	spi->mode = SPI_MODE_0;

	dev_set_drvdata(&spi->dev, wm831x);
	wm831x->dev = &spi->dev;

	wm831x->regmap = regmap_init_spi(spi, &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, type, spi->irq);
}

static int __devexit wm831x_spi_remove(struct spi_device *spi)
{
	struct wm831x *wm831x = dev_get_drvdata(&spi->dev);

	wm831x_device_exit(wm831x);

	return 0;
}

static int wm831x_spi_suspend(struct device *dev)
{
	struct wm831x *wm831x = dev_get_drvdata(dev);

	return wm831x_device_suspend(wm831x);
}

static const struct dev_pm_ops wm831x_spi_pm = {
	.freeze = wm831x_spi_suspend,
	.suspend = wm831x_spi_suspend,
};

static const struct spi_device_id wm831x_spi_ids[] = {
	{ "wm8310", WM8310 },
	{ "wm8311", WM8311 },
	{ "wm8312", WM8312 },
	{ "wm8320", WM8320 },
	{ "wm8321", WM8321 },
	{ "wm8325", WM8325 },
	{ "wm8326", WM8326 },
	{ },
};
MODULE_DEVICE_TABLE(spi, wm831x_spi_id);

static struct spi_driver wm831x_spi_driver = {
	.driver = {
		.name	= "wm831x",
		.bus	= &spi_bus_type,
		.owner	= THIS_MODULE,
		.pm	= &wm831x_spi_pm,
	},
	.id_table	= wm831x_spi_ids,
	.probe		= wm831x_spi_probe,
	.remove		= __devexit_p(wm831x_spi_remove),
};

static int __init wm831x_spi_init(void)
{
	int ret;

	ret = spi_register_driver(&wm831x_spi_driver);
	if (ret != 0)
		pr_err("Failed to register WM831x SPI driver: %d\n", ret);

	return 0;
}
subsys_initcall(wm831x_spi_init);

static void __exit wm831x_spi_exit(void)
{
	spi_unregister_driver(&wm831x_spi_driver);
}
module_exit(wm831x_spi_exit);

MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mark Brown");
Commit	Line	Data
2aa13b9e MB	1	/*
	2	* wm831x-spi.c -- SPI 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>
87d1906d	17	#include <linux/pm.h>
2aa13b9e	18	#include <linux/spi/spi.h>
1df5981b MB	19	#include <linux/regmap.h>
1df5981b MB	20	#include <linux/err.h>
2aa13b9e MB	21
	22	#include <linux/mfd/wm831x/core.h>
	23
2aa13b9e MB	24	static int __devinit wm831x_spi_probe(struct spi_device *spi)
2aa13b9e MB	25	{
5570c2f7	26	const struct spi_device_id *id = spi_get_device_id(spi);
2aa13b9e MB	27	struct wm831x *wm831x;
2aa13b9e MB	28	enum wm831x_parent type;
1df5981b	29	int ret;
2aa13b9e	30
5570c2f7	31	type = (enum wm831x_parent)id->driver_data;
2aa13b9e MB	32
	33	wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
	34	if (wm831x == NULL)
	35	return -ENOMEM;
	36
	37	spi->bits_per_word = 16;
	38	spi->mode = SPI_MODE_0;
	39
	40	dev_set_drvdata(&spi->dev, wm831x);
	41	wm831x->dev = &spi->dev;
1df5981b	42
5570c2f7	43	wm831x->regmap = regmap_init_spi(spi, &wm831x_regmap_config);
1df5981b MB	44	if (IS_ERR(wm831x->regmap)) {
	45	ret = PTR_ERR(wm831x->regmap);
	46	dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
	47	ret);
	48	kfree(wm831x);
	49	return ret;
	50	}
2aa13b9e MB	51
	52	return wm831x_device_init(wm831x, type, spi->irq);
	53	}
	54
	55	static int __devexit wm831x_spi_remove(struct spi_device *spi)
	56	{
	57	struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
	58
	59	wm831x_device_exit(wm831x);
	60
	61	return 0;
	62	}
	63
87d1906d	64	static int wm831x_spi_suspend(struct device *dev)
2aa13b9e	65	{
87d1906d	66	struct wm831x *wm831x = dev_get_drvdata(dev);
2aa13b9e MB	67
	68	return wm831x_device_suspend(wm831x);
	69	}
	70
87d1906d MB	71	static const struct dev_pm_ops wm831x_spi_pm = {
	72	.freeze = wm831x_spi_suspend,
	73	.suspend = wm831x_spi_suspend,
	74	};
	75
5570c2f7 MB	76	static const struct spi_device_id wm831x_spi_ids[] = {
	77	{ "wm8310", WM8310 },
	78	{ "wm8311", WM8311 },
	79	{ "wm8312", WM8312 },
	80	{ "wm8320", WM8320 },
	81	{ "wm8321", WM8321 },
	82	{ "wm8325", WM8325 },
	83	{ "wm8326", WM8326 },
	84	{ },
2aa13b9e	85	};
5570c2f7	86	MODULE_DEVICE_TABLE(spi, wm831x_spi_id);
2aa13b9e	87
5570c2f7	88	static struct spi_driver wm831x_spi_driver = {
2aa13b9e	89	.driver = {
5570c2f7	90	.name = "wm831x",
412dc11d MB	91	.bus = &spi_bus_type,
412dc11d MB	92	.owner = THIS_MODULE,
87d1906d	93	.pm = &wm831x_spi_pm,
412dc11d	94	},
5570c2f7	95	.id_table = wm831x_spi_ids,
412dc11d MB	96	.probe = wm831x_spi_probe,
412dc11d MB	97	.remove = __devexit_p(wm831x_spi_remove),
412dc11d MB	98	};
412dc11d MB	99
2aa13b9e MB	100	static int __init wm831x_spi_init(void)
	101	{
	102	int ret;
	103
5570c2f7	104	ret = spi_register_driver(&wm831x_spi_driver);
412dc11d	105	if (ret != 0)
5570c2f7	106	pr_err("Failed to register WM831x SPI driver: %d\n", ret);
412dc11d	107
2aa13b9e MB	108	return 0;
	109	}
	110	subsys_initcall(wm831x_spi_init);
	111
	112	static void __exit wm831x_spi_exit(void)
	113	{
5570c2f7	114	spi_unregister_driver(&wm831x_spi_driver);
2aa13b9e MB	115	}
	116	module_exit(wm831x_spi_exit);
	117
	118	MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
	119	MODULE_LICENSE("GPL");
	120	MODULE_AUTHOR("Mark Brown");