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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AD714X CapTouch Programmable Controller driver (I2C bus)
 *
 * Copyright 2009-2011 Analog Devices Inc.
 */

#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"

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

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

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 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 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,
	.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
80503b23	1	// SPDX-License-Identifier: GPL-2.0-or-later
31a62963 BW	2	/*
	3	* AD714X CapTouch Programmable Controller driver (I2C bus)
	4	*
9eff794b	5	* Copyright 2009-2011 Analog Devices Inc.
31a62963 BW	6	*/
	7
	8	#include <linux/input.h> /* BUS_I2C */
	9	#include <linux/i2c.h>
	10	#include <linux/module.h>
	11	#include <linux/types.h>
6b7cfd19	12	#include <linux/pm.h>
31a62963 BW	13	#include "ad714x.h"
31a62963 BW	14
97a652a8	15	static int __maybe_unused ad714x_i2c_suspend(struct device *dev)
31a62963	16	{
6b7cfd19	17	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963 BW	18	}
31a62963 BW	19
97a652a8	20	static int __maybe_unused ad714x_i2c_resume(struct device *dev)
31a62963	21	{
6b7cfd19	22	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963	23	}
31a62963	24
6b7cfd19 MB	25	static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);
6b7cfd19 MB	26
c0409feb DT	27	static int ad714x_i2c_write(struct ad714x_chip *chip,
c0409feb DT	28	unsigned short reg, unsigned short data)
31a62963	29	{
c0409feb DT	30	struct i2c_client *client = to_i2c_client(chip->dev);
	31	int error;
	32
	33	chip->xfer_buf[0] = cpu_to_be16(reg);
	34	chip->xfer_buf[1] = cpu_to_be16(data);
	35
	36	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
	37	2 * sizeof(*chip->xfer_buf));
	38	if (unlikely(error < 0)) {
	39	dev_err(&client->dev, "I2C write error: %d\n", error);
	40	return error;
	41	}
	42
	43	return 0;
31a62963 BW	44	}
31a62963 BW	45
c0409feb	46	static int ad714x_i2c_read(struct ad714x_chip *chip,
9eff794b	47	unsigned short reg, unsigned short *data, size_t len)
31a62963	48	{
c0409feb	49	struct i2c_client *client = to_i2c_client(chip->dev);
9eff794b	50	int i;
c0409feb DT	51	int error;
	52
	53	chip->xfer_buf[0] = cpu_to_be16(reg);
31a62963	54
c0409feb DT	55	error = i2c_master_send(client, (u8 *)chip->xfer_buf,
	56	sizeof(*chip->xfer_buf));
	57	if (error >= 0)
	58	error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
9eff794b	59	len * sizeof(*chip->xfer_buf));
31a62963	60
c0409feb DT	61	if (unlikely(error < 0)) {
	62	dev_err(&client->dev, "I2C read error: %d\n", error);
	63	return error;
31a62963 BW	64	}
31a62963 BW	65
9eff794b MH	66	for (i = 0; i < len; i++)
	67	data[i] = be16_to_cpu(chip->xfer_buf[i]);
	68
c0409feb	69	return 0;
31a62963 BW	70	}
31a62963 BW	71
5298cc4c	72	static int ad714x_i2c_probe(struct i2c_client *client,
31a62963 BW	73	const struct i2c_device_id *id)
	74	{
	75	struct ad714x_chip *chip;
	76
	77	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
	78	ad714x_i2c_read, ad714x_i2c_write);
	79	if (IS_ERR(chip))
	80	return PTR_ERR(chip);
	81
	82	i2c_set_clientdata(client, chip);
	83
	84	return 0;
	85	}
	86
31a62963 BW	87	static const struct i2c_device_id ad714x_id[] = {
31a62963 BW	88	{ "ad7142_captouch", 0 },
6c04d7b3	89	{ "ad7143_captouch", 0 },
31a62963	90	{ "ad7147_captouch", 0 },
6c04d7b3 BS	91	{ "ad7147a_captouch", 0 },
6c04d7b3 BS	92	{ "ad7148_captouch", 0 },
31a62963 BW	93	{ }
	94	};
	95	MODULE_DEVICE_TABLE(i2c, ad714x_id);
	96
	97	static struct i2c_driver ad714x_i2c_driver = {
	98	.driver = {
	99	.name = "ad714x_captouch",
6b7cfd19	100	.pm = &ad714x_i2c_pm,
31a62963 BW	101	},
31a62963 BW	102	.probe = ad714x_i2c_probe,
31a62963 BW	103	.id_table = ad714x_id,
	104	};
	105
1b92c1cf	106	module_i2c_driver(ad714x_i2c_driver);
31a62963 BW	107
	108	MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
	109	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	110	MODULE_LICENSE("GPL");