[mirror_ubuntu-artful-kernel.git] / drivers / input / touchscreen / tsc2005.c

/*
 * 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>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#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);
}

static int tsc2005_remove(struct spi_device *spi)
{
	return tsc200x_remove(&spi->dev);
}

#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",
		.of_match_table = of_match_ptr(tsc2005_of_match),
		.pm	= &tsc200x_pm_ops,
	},
	.probe	= tsc2005_probe,
	.remove	= tsc2005_remove,
};
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
37bd4469 LL	1	/*
	2	* TSC2005 touchscreen driver
	3	*
	4	* Copyright (C) 2006-2010 Nokia Corporation
6ac24381 MW	5	* Copyright (C) 2015 QWERTY Embedded Design
6ac24381 MW	6	* Copyright (C) 2015 EMAC Inc.
37bd4469	7	*
6ac24381	8	* Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
37bd4469 LL	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
37bd4469 LL	19	*/
37bd4469 LL	20
37bd4469	21	#include <linux/input.h>
449aa83e DT	22	#include <linux/module.h>
449aa83e DT	23	#include <linux/of.h>
37bd4469	24	#include <linux/spi/spi.h>
273cf48a	25	#include <linux/regmap.h>
6ac24381	26	#include "tsc200x-core.h"
37bd4469	27
e9003c9c MW	28	static const struct input_id tsc2005_input_id = {
	29	.bustype = BUS_SPI,
	30	.product = 2005,
	31	};
	32
6ac24381	33	static int tsc2005_cmd(struct device *dev, u8 cmd)
37bd4469	34	{
ef3b98c2	35	u8 tx = TSC200X_CMD \| TSC200X_CMD_12BIT \| cmd;
9a6e180a	36	struct spi_transfer xfer = {
6ac24381 MW	37	.tx_buf = &tx,
	38	.len = 1,
	39	.bits_per_word = 8,
9a6e180a	40	};
37bd4469	41	struct spi_message msg;
6ac24381	42	struct spi_device *spi = to_spi_device(dev);
71f80045	43	int error;
37bd4469 LL	44
	45	spi_message_init(&msg);
	46	spi_message_add_tail(&xfer, &msg);
71f80045	47
6ac24381	48	error = spi_sync(spi, &msg);
71f80045	49	if (error) {
6ac24381	50	dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
71f80045 DT	51	__func__, cmd, error);
	52	return error;
	53	}
	54
	55	return 0;
37bd4469 LL	56	}
37bd4469 LL	57
5298cc4c	58	static int tsc2005_probe(struct spi_device *spi)
37bd4469	59	{
99bb892d	60	int error;
37bd4469	61
99bb892d DT	62	spi->mode = SPI_MODE_0;
	63	spi->bits_per_word = 8;
	64	if (!spi->max_speed_hz)
	65	spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
37bd4469	66
99bb892d DT	67	error = spi_setup(spi);
	68	if (error)
	69	return error;
37bd4469	70
e9003c9c	71	return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
6ac24381 MW	72	devm_regmap_init_spi(spi, &tsc200x_regmap_config),
6ac24381 MW	73	tsc2005_cmd);
37bd4469 LL	74	}
37bd4469 LL	75
e2619cf7	76	static int tsc2005_remove(struct spi_device *spi)
37bd4469	77	{
6ac24381	78	return tsc200x_remove(&spi->dev);
37bd4469	79	}
37bd4469	80
449aa83e DT	81	#ifdef CONFIG_OF
	82	static const struct of_device_id tsc2005_of_match[] = {
	83	{ .compatible = "ti,tsc2005" },
	84	{ /* sentinel */ }
	85	};
	86	MODULE_DEVICE_TABLE(of, tsc2005_of_match);
	87	#endif
	88
37bd4469	89	static struct spi_driver tsc2005_driver = {
3ff8ff53 DT	90	.driver = {
3ff8ff53 DT	91	.name = "tsc2005",
449aa83e	92	.of_match_table = of_match_ptr(tsc2005_of_match),
6ac24381	93	.pm = &tsc200x_pm_ops,
37bd4469	94	},
3ff8ff53	95	.probe = tsc2005_probe,
1cb0aa88	96	.remove = tsc2005_remove,
37bd4469	97	};
ca83922e	98	module_spi_driver(tsc2005_driver);
37bd4469	99
6ac24381	100	MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
b88aa494	101	MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
37bd4469	102	MODULE_LICENSE("GPL");
938789fe	103	MODULE_ALIAS("spi:tsc2005");