[mirror_ubuntu-artful-kernel.git] / drivers / mfd / arizona-spi.c

/*
 * arizona-spi.c  --  Arizona SPI bus interface
 *
 * Copyright 2012 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 version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/of.h>

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

#include "arizona.h"

static int arizona_spi_probe(struct spi_device *spi)
{
	const struct spi_device_id *id = spi_get_device_id(spi);
	struct arizona *arizona;
	const struct regmap_config *regmap_config = NULL;
	unsigned long type;
	int ret;

	if (spi->dev.of_node)
		type = arizona_of_get_type(&spi->dev);
	else
		type = id->driver_data;

	switch (type) {
	case WM5102:
		if (IS_ENABLED(CONFIG_MFD_WM5102))
			regmap_config = &wm5102_spi_regmap;
		break;
	case WM5110:
	case WM8280:
		if (IS_ENABLED(CONFIG_MFD_WM5110))
			regmap_config = &wm5110_spi_regmap;
		break;
	default:
		dev_err(&spi->dev, "Unknown device type %ld\n",
			id->driver_data);
		return -EINVAL;
	}

	if (!regmap_config) {
		dev_err(&spi->dev,
			"No kernel support for device type %ld\n", type);
		return -EINVAL;
	}

	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
	if (arizona == NULL)
		return -ENOMEM;

	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
	if (IS_ERR(arizona->regmap)) {
		ret = PTR_ERR(arizona->regmap);
		dev_err(&spi->dev, "Failed to allocate register map: %d\n",
			ret);
		return ret;
	}

	arizona->type = id->driver_data;
	arizona->dev = &spi->dev;
	arizona->irq = spi->irq;

	return arizona_dev_init(arizona);
}

static int arizona_spi_remove(struct spi_device *spi)
{
	struct arizona *arizona = spi_get_drvdata(spi);

	arizona_dev_exit(arizona);

	return 0;
}

static const struct spi_device_id arizona_spi_ids[] = {
	{ "wm5102", WM5102 },
	{ "wm5110", WM5110 },
	{ "wm8280", WM8280 },
	{ },
};
MODULE_DEVICE_TABLE(spi, arizona_spi_ids);

static struct spi_driver arizona_spi_driver = {
	.driver = {
		.name	= "arizona",
		.owner	= THIS_MODULE,
		.pm	= &arizona_pm_ops,
		.of_match_table	= of_match_ptr(arizona_of_match),
	},
	.probe		= arizona_spi_probe,
	.remove		= arizona_spi_remove,
	.id_table	= arizona_spi_ids,
};

module_spi_driver(arizona_spi_driver);

MODULE_DESCRIPTION("Arizona SPI bus interface");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
a15123c7 MB	1	/*
	2	* arizona-spi.c -- Arizona SPI bus interface
	3	*
	4	* Copyright 2012 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
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/err.h>
	14	#include <linux/module.h>
	15	#include <linux/pm_runtime.h>
	16	#include <linux/regmap.h>
	17	#include <linux/regulator/consumer.h>
	18	#include <linux/slab.h>
	19	#include <linux/spi/spi.h>
3d6d1d1c	20	#include <linux/of.h>
a15123c7 MB	21
	22	#include <linux/mfd/arizona/core.h>
	23
	24	#include "arizona.h"
	25
f791be49	26	static int arizona_spi_probe(struct spi_device *spi)
a15123c7 MB	27	{
	28	const struct spi_device_id *id = spi_get_device_id(spi);
	29	struct arizona *arizona;
b61c1ec0	30	const struct regmap_config *regmap_config = NULL;
942786e6 LJ	31	unsigned long type;
942786e6 LJ	32	int ret;
a15123c7	33
d781009c MB	34	if (spi->dev.of_node)
	35	type = arizona_of_get_type(&spi->dev);
	36	else
	37	type = id->driver_data;
	38
	39	switch (type) {
a15123c7	40	case WM5102:
b61c1ec0 RF	41	if (IS_ENABLED(CONFIG_MFD_WM5102))
b61c1ec0 RF	42	regmap_config = &wm5102_spi_regmap;
a15123c7	43	break;
e102befe	44	case WM5110:
e5d4ef0d	45	case WM8280:
b61c1ec0 RF	46	if (IS_ENABLED(CONFIG_MFD_WM5110))
b61c1ec0 RF	47	regmap_config = &wm5110_spi_regmap;
e102befe	48	break;
a15123c7 MB	49	default:
	50	dev_err(&spi->dev, "Unknown device type %ld\n",
	51	id->driver_data);
	52	return -EINVAL;
	53	}
	54
b61c1ec0 RF	55	if (!regmap_config) {
	56	dev_err(&spi->dev,
	57	"No kernel support for device type %ld\n", type);
	58	return -EINVAL;
	59	}
	60
a15123c7 MB	61	arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
	62	if (arizona == NULL)
	63	return -ENOMEM;
	64
	65	arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
	66	if (IS_ERR(arizona->regmap)) {
	67	ret = PTR_ERR(arizona->regmap);
	68	dev_err(&spi->dev, "Failed to allocate register map: %d\n",
	69	ret);
	70	return ret;
	71	}
	72
	73	arizona->type = id->driver_data;
	74	arizona->dev = &spi->dev;
	75	arizona->irq = spi->irq;
	76
	77	return arizona_dev_init(arizona);
	78	}
	79
4740f73f	80	static int arizona_spi_remove(struct spi_device *spi)
a15123c7	81	{
e9642d5e	82	struct arizona *arizona = spi_get_drvdata(spi);
6f467e5f	83
a15123c7	84	arizona_dev_exit(arizona);
6f467e5f	85
a15123c7 MB	86	return 0;
	87	}
	88
	89	static const struct spi_device_id arizona_spi_ids[] = {
	90	{ "wm5102", WM5102 },
e102befe	91	{ "wm5110", WM5110 },
e5d4ef0d	92	{ "wm8280", WM8280 },
a15123c7 MB	93	{ },
	94	};
	95	MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
	96
	97	static struct spi_driver arizona_spi_driver = {
	98	.driver = {
	99	.name = "arizona",
	100	.owner = THIS_MODULE,
	101	.pm = &arizona_pm_ops,
d781009c	102	.of_match_table = of_match_ptr(arizona_of_match),
a15123c7 MB	103	},
a15123c7 MB	104	.probe = arizona_spi_probe,
84449216	105	.remove = arizona_spi_remove,
a15123c7 MB	106	.id_table = arizona_spi_ids,
	107	};
	108
	109	module_spi_driver(arizona_spi_driver);
	110
	111	MODULE_DESCRIPTION("Arizona SPI bus interface");
	112	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	113	MODULE_LICENSE("GPL");