[linux-2.6-block.git] / drivers / input / touchscreen / ad7879-i2c.c

/*
 * AD7879-1/AD7889-1 touchscreen (I2C bus)
 *
 * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/input.h>	/* BUS_I2C */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/of.h>
#include <linux/pm.h>
#include <linux/regmap.h>

#include "ad7879.h"

#define AD7879_DEVID		0x79	/* AD7879-1/AD7889-1 */

static const struct regmap_config ad7879_i2c_regmap_config = {
	.reg_bits = 8,
	.val_bits = 16,
	.max_register = 15,
};

static int ad7879_i2c_probe(struct i2c_client *client,
				      const struct i2c_device_id *id)
{
	struct regmap *regmap;

	if (!i2c_check_functionality(client->adapter,
				     I2C_FUNC_SMBUS_WORD_DATA)) {
		dev_err(&client->dev, "SMBUS Word Data not Supported\n");
		return -EIO;
	}

	regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	return ad7879_probe(&client->dev, regmap, client->irq,
			    BUS_I2C, AD7879_DEVID);
}

static const struct i2c_device_id ad7879_id[] = {
	{ "ad7879", 0 },
	{ "ad7889", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad7879_id);

#ifdef CONFIG_OF
static const struct of_device_id ad7879_i2c_dt_ids[] = {
	{ .compatible = "adi,ad7879-1", },
	{ }
};
MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
#endif

static struct i2c_driver ad7879_i2c_driver = {
	.driver = {
		.name	= "ad7879",
		.pm	= &ad7879_pm_ops,
		.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
	},
	.probe		= ad7879_i2c_probe,
	.id_table	= ad7879_id,
};

module_i2c_driver(ad7879_i2c_driver);

MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
4397c98a MF	1	/*
	2	* AD7879-1/AD7889-1 touchscreen (I2C bus)
	3	*
	4	* Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/input.h> /* BUS_I2C */
	10	#include <linux/i2c.h>
	11	#include <linux/module.h>
	12	#include <linux/types.h>
fa6e3ca2	13	#include <linux/of.h>
d5dc9ac3	14	#include <linux/pm.h>
404a24c3	15	#include <linux/regmap.h>
4397c98a MF	16
	17	#include "ad7879.h"
	18
	19	#define AD7879_DEVID 0x79 /* AD7879-1/AD7889-1 */
	20
404a24c3 DT	21	static const struct regmap_config ad7879_i2c_regmap_config = {
	22	.reg_bits = 8,
	23	.val_bits = 16,
	24	.max_register = 15,
4397c98a MF	25	};
4397c98a MF	26
5298cc4c	27	static int ad7879_i2c_probe(struct i2c_client *client,
4397c98a MF	28	const struct i2c_device_id *id)
4397c98a MF	29	{
404a24c3	30	struct regmap *regmap;
4397c98a MF	31
	32	if (!i2c_check_functionality(client->adapter,
	33	I2C_FUNC_SMBUS_WORD_DATA)) {
	34	dev_err(&client->dev, "SMBUS Word Data not Supported\n");
	35	return -EIO;
	36	}
	37
404a24c3 DT	38	regmap = devm_regmap_init_i2c(client, &ad7879_i2c_regmap_config);
	39	if (IS_ERR(regmap))
	40	return PTR_ERR(regmap);
	41
4e34025b DT	42	return ad7879_probe(&client->dev, regmap, client->irq,
4e34025b DT	43	BUS_I2C, AD7879_DEVID);
4397c98a MF	44	}
	45
	46	static const struct i2c_device_id ad7879_id[] = {
	47	{ "ad7879", 0 },
	48	{ "ad7889", 0 },
	49	{ }
	50	};
	51	MODULE_DEVICE_TABLE(i2c, ad7879_id);
	52
fa6e3ca2 SA	53	#ifdef CONFIG_OF
	54	static const struct of_device_id ad7879_i2c_dt_ids[] = {
	55	{ .compatible = "adi,ad7879-1", },
	56	{ }
	57	};
	58	MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
	59	#endif
	60
4397c98a MF	61	static struct i2c_driver ad7879_i2c_driver = {
	62	.driver = {
	63	.name = "ad7879",
8672bd93	64	.pm = &ad7879_pm_ops,
fa6e3ca2	65	.of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
4397c98a MF	66	},
4397c98a MF	67	.probe = ad7879_i2c_probe,
4397c98a MF	68	.id_table = ad7879_id,
	69	};
	70
1b92c1cf	71	module_i2c_driver(ad7879_i2c_driver);
4397c98a	72
2581e5d1	73	MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
4397c98a MF	74	MODULE_DESCRIPTION("AD7879(-1) touchscreen I2C bus driver");
4397c98a MF	75	MODULE_LICENSE("GPL");