[linux-2.6-block.git] / drivers / input / touchscreen / tsc2005.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * TSC2005 touchscreen driver
 *
 * Copyright (C) 2006-2010 Nokia Corporation
 * Copyright (C) 2015 QWERTY Embedded Design
 * Copyright (C) 2015 EMAC Inc.
 *
 * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
 */

#include <linux/input.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include "tsc200x-core.h"

static const struct input_id tsc2005_input_id = {
	.bustype = BUS_SPI,
	.product = 2005,
};

static int tsc2005_cmd(struct device *dev, u8 cmd)
{
	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
	struct spi_transfer xfer = {
		.tx_buf         = &tx,
		.len            = 1,
		.bits_per_word  = 8,
	};
	struct spi_message msg;
	struct spi_device *spi = to_spi_device(dev);
	int error;

	spi_message_init(&msg);
	spi_message_add_tail(&xfer, &msg);

	error = spi_sync(spi, &msg);
	if (error) {
		dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
			__func__, cmd, error);
		return error;
	}

	return 0;
}

static int tsc2005_probe(struct spi_device *spi)
{
	int error;

	spi->mode = SPI_MODE_0;
	spi->bits_per_word = 8;
	if (!spi->max_speed_hz)
		spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;

	error = spi_setup(spi);
	if (error)
		return error;

	return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
			     tsc2005_cmd);
}

#ifdef CONFIG_OF
static const struct of_device_id tsc2005_of_match[] = {
	{ .compatible = "ti,tsc2005" },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tsc2005_of_match);
#endif

static struct spi_driver tsc2005_driver = {
	.driver	= {
		.name		= "tsc2005",
		.dev_groups	= tsc200x_groups,
		.of_match_table	= of_match_ptr(tsc2005_of_match),
		.pm		= pm_sleep_ptr(&tsc200x_pm_ops),
	},
	.probe	= tsc2005_probe,
};
module_spi_driver(tsc2005_driver);

MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:tsc2005");
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0-or-later
	2	/*
	3	* TSC2005 touchscreen driver
	4	*
	5	* Copyright (C) 2006-2010 Nokia Corporation
	6	* Copyright (C) 2015 QWERTY Embedded Design
	7	* Copyright (C) 2015 EMAC Inc.
	8	*
	9	* Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
	10	*/
	11
	12	#include <linux/input.h>
	13	#include <linux/module.h>
	14	#include <linux/of.h>
	15	#include <linux/spi/spi.h>
	16	#include <linux/regmap.h>
	17	#include "tsc200x-core.h"
	18
	19	static const struct input_id tsc2005_input_id = {
	20	.bustype = BUS_SPI,
	21	.product = 2005,
	22	};
	23
	24	static int tsc2005_cmd(struct device *dev, u8 cmd)
	25	{
	26	u8 tx = TSC200X_CMD \| TSC200X_CMD_12BIT \| cmd;
	27	struct spi_transfer xfer = {
	28	.tx_buf = &tx,
	29	.len = 1,
	30	.bits_per_word = 8,
	31	};
	32	struct spi_message msg;
	33	struct spi_device *spi = to_spi_device(dev);
	34	int error;
	35
	36	spi_message_init(&msg);
	37	spi_message_add_tail(&xfer, &msg);
	38
	39	error = spi_sync(spi, &msg);
	40	if (error) {
	41	dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
	42	__func__, cmd, error);
	43	return error;
	44	}
	45
	46	return 0;
	47	}
	48
	49	static int tsc2005_probe(struct spi_device *spi)
	50	{
	51	int error;
	52
	53	spi->mode = SPI_MODE_0;
	54	spi->bits_per_word = 8;
	55	if (!spi->max_speed_hz)
	56	spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
	57
	58	error = spi_setup(spi);
	59	if (error)
	60	return error;
	61
	62	return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
	63	devm_regmap_init_spi(spi, &tsc200x_regmap_config),
	64	tsc2005_cmd);
	65	}
	66
	67	#ifdef CONFIG_OF
	68	static const struct of_device_id tsc2005_of_match[] = {
	69	{ .compatible = "ti,tsc2005" },
	70	{ /* sentinel */ }
	71	};
	72	MODULE_DEVICE_TABLE(of, tsc2005_of_match);
	73	#endif
	74
	75	static struct spi_driver tsc2005_driver = {
	76	.driver = {
	77	.name = "tsc2005",
	78	.dev_groups = tsc200x_groups,
	79	.of_match_table = of_match_ptr(tsc2005_of_match),
	80	.pm = pm_sleep_ptr(&tsc200x_pm_ops),
	81	},
	82	.probe = tsc2005_probe,
	83	};
	84	module_spi_driver(tsc2005_driver);
	85
	86	MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
	87	MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
	88	MODULE_LICENSE("GPL");
	89	MODULE_ALIAS("spi:tsc2005");