[mirror_ubuntu-jammy-kernel.git] / drivers / input / misc / ad714x-i2c.c

/*
 * AD714X CapTouch Programmable Controller driver (I2C bus)
 *
 * Copyright 2009-2011 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/pm.h>
#include "ad714x.h"

#ifdef CONFIG_PM
static int ad714x_i2c_suspend(struct device *dev)
{
	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
}

static int ad714x_i2c_resume(struct device *dev)
{
	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
}
#endif

static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);

static int ad714x_i2c_write(struct ad714x_chip *chip,
			    unsigned short reg, unsigned short data)
{
	struct i2c_client *client = to_i2c_client(chip->dev);
	int error;

	chip->xfer_buf[0] = cpu_to_be16(reg);
	chip->xfer_buf[1] = cpu_to_be16(data);

	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
				2 * sizeof(*chip->xfer_buf));
	if (unlikely(error < 0)) {
		dev_err(&client->dev, "I2C write error: %d\n", error);
		return error;
	}

	return 0;
}

static int ad714x_i2c_read(struct ad714x_chip *chip,
			   unsigned short reg, unsigned short *data, size_t len)
{
	struct i2c_client *client = to_i2c_client(chip->dev);
	int i;
	int error;

	chip->xfer_buf[0] = cpu_to_be16(reg);

	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
				sizeof(*chip->xfer_buf));
	if (error >= 0)
		error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
					len * sizeof(*chip->xfer_buf));

	if (unlikely(error < 0)) {
		dev_err(&client->dev, "I2C read error: %d\n", error);
		return error;
	}

	for (i = 0; i < len; i++)
		data[i] = be16_to_cpu(chip->xfer_buf[i]);

	return 0;
}

static int __devinit ad714x_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct ad714x_chip *chip;

	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
			    ad714x_i2c_read, ad714x_i2c_write);
	if (IS_ERR(chip))
		return PTR_ERR(chip);

	i2c_set_clientdata(client, chip);

	return 0;
}

static int __devexit ad714x_i2c_remove(struct i2c_client *client)
{
	struct ad714x_chip *chip = i2c_get_clientdata(client);

	ad714x_remove(chip);

	return 0;
}

static const struct i2c_device_id ad714x_id[] = {
	{ "ad7142_captouch", 0 },
	{ "ad7143_captouch", 0 },
	{ "ad7147_captouch", 0 },
	{ "ad7147a_captouch", 0 },
	{ "ad7148_captouch", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad714x_id);

static struct i2c_driver ad714x_i2c_driver = {
	.driver = {
		.name = "ad714x_captouch",
		.pm   = &ad714x_i2c_pm,
	},
	.probe    = ad714x_i2c_probe,
	.remove   = ad714x_i2c_remove,
	.id_table = ad714x_id,
};

module_i2c_driver(ad714x_i2c_driver);

MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
31a62963 BW	1	/*
	2	* AD714X CapTouch Programmable Controller driver (I2C bus)
	3	*
9eff794b	4	* Copyright 2009-2011 Analog Devices Inc.
31a62963 BW	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>
6b7cfd19	13	#include <linux/pm.h>
31a62963 BW	14	#include "ad714x.h"
	15
	16	#ifdef CONFIG_PM
6b7cfd19	17	static int ad714x_i2c_suspend(struct device *dev)
31a62963	18	{
6b7cfd19	19	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963 BW	20	}
31a62963 BW	21
6b7cfd19	22	static int ad714x_i2c_resume(struct device *dev)
31a62963	23	{
6b7cfd19	24	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963	25	}
31a62963 BW	26	#endif
31a62963 BW	27
6b7cfd19 MB	28	static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);
6b7cfd19 MB	29
c0409feb DT	30	static int ad714x_i2c_write(struct ad714x_chip *chip,
c0409feb DT	31	unsigned short reg, unsigned short data)
31a62963	32	{
c0409feb DT	33	struct i2c_client *client = to_i2c_client(chip->dev);
	34	int error;
	35
	36	chip->xfer_buf[0] = cpu_to_be16(reg);
	37	chip->xfer_buf[1] = cpu_to_be16(data);
	38
	39	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
	40	2 * sizeof(*chip->xfer_buf));
	41	if (unlikely(error < 0)) {
	42	dev_err(&client->dev, "I2C write error: %d\n", error);
	43	return error;
	44	}
	45
	46	return 0;
31a62963 BW	47	}
31a62963 BW	48
c0409feb	49	static int ad714x_i2c_read(struct ad714x_chip *chip,
9eff794b	50	unsigned short reg, unsigned short *data, size_t len)
31a62963	51	{
c0409feb	52	struct i2c_client *client = to_i2c_client(chip->dev);
9eff794b	53	int i;
c0409feb DT	54	int error;
	55
	56	chip->xfer_buf[0] = cpu_to_be16(reg);
31a62963	57
c0409feb DT	58	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
	59	sizeof(*chip->xfer_buf));
	60	if (error >= 0)
	61	error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
9eff794b	62	len * sizeof(*chip->xfer_buf));
31a62963	63
c0409feb DT	64	if (unlikely(error < 0)) {
	65	dev_err(&client->dev, "I2C read error: %d\n", error);
	66	return error;
31a62963 BW	67	}
31a62963 BW	68
9eff794b MH	69	for (i = 0; i < len; i++)
	70	data[i] = be16_to_cpu(chip->xfer_buf[i]);
	71
c0409feb	72	return 0;
31a62963 BW	73	}
	74
	75	static int __devinit ad714x_i2c_probe(struct i2c_client *client,
	76	const struct i2c_device_id *id)
	77	{
	78	struct ad714x_chip *chip;
	79
	80	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
	81	ad714x_i2c_read, ad714x_i2c_write);
	82	if (IS_ERR(chip))
	83	return PTR_ERR(chip);
	84
	85	i2c_set_clientdata(client, chip);
	86
	87	return 0;
	88	}
	89
	90	static int __devexit ad714x_i2c_remove(struct i2c_client *client)
	91	{
	92	struct ad714x_chip *chip = i2c_get_clientdata(client);
	93
	94	ad714x_remove(chip);
31a62963 BW	95
	96	return 0;
	97	}
	98
	99	static const struct i2c_device_id ad714x_id[] = {
	100	{ "ad7142_captouch", 0 },
6c04d7b3	101	{ "ad7143_captouch", 0 },
31a62963	102	{ "ad7147_captouch", 0 },
6c04d7b3 BS	103	{ "ad7147a_captouch", 0 },
6c04d7b3 BS	104	{ "ad7148_captouch", 0 },
31a62963 BW	105	{ }
	106	};
	107	MODULE_DEVICE_TABLE(i2c, ad714x_id);
	108
	109	static struct i2c_driver ad714x_i2c_driver = {
	110	.driver = {
	111	.name = "ad714x_captouch",
6b7cfd19	112	.pm = &ad714x_i2c_pm,
31a62963 BW	113	},
31a62963 BW	114	.probe = ad714x_i2c_probe,
1cb0aa88	115	.remove = ad714x_i2c_remove,
31a62963 BW	116	.id_table = ad714x_id,
	117	};
	118
1b92c1cf	119	module_i2c_driver(ad714x_i2c_driver);
31a62963 BW	120
	121	MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
	122	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	123	MODULE_LICENSE("GPL");