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Commit 4f9e8680 authored by Ferruh Yigit's avatar Ferruh Yigit Committed by Dmitry Torokhov
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Input: cyttsp4 - I2C driver for Cypress TMA4XX touchscreen devices



Cypress TrueTouch(tm) Standard Product controllers,
Generation4 devices, I2C adapter module.

This driver adds communication support with TTSP controller
using I2C bus.

Signed-off-by: default avatarFerruh Yigit <fery@cypress.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: default avatarJavier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 17fb1563
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+9 −0
Original line number Diff line number Diff line
@@ -179,6 +179,15 @@ config TOUCHSCREEN_CYTTSP4_CORE

	  To compile this driver as a module, choose M here.

config TOUCHSCREEN_CYTTSP4_I2C
	tristate "support I2C bus connection"
	depends on TOUCHSCREEN_CYTTSP4_CORE && I2C
	help
	  Say Y here if the touchscreen is connected via I2C bus.

	  To compile this driver as a module, choose M here: the
	  module will be called cyttsp4_i2c.

config TOUCHSCREEN_DA9034
	tristate "Touchscreen support for Dialog Semiconductor DA9034"
	depends on PMIC_DA903X
+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o cyttsp_i2c_common.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)	+= cyttsp_spi.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_CORE)	+= cyttsp4_core.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP4_I2C)	+= cyttsp4_i2c.o cyttsp_i2c_common.o
obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
obj-$(CONFIG_TOUCHSCREEN_DA9052)	+= da9052_tsi.o
obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
+90 −0
Original line number Diff line number Diff line
/*
 * cyttsp_i2c.c
 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
 * For use with Cypress  Txx4xx parts.
 * Supported parts include:
 * TMA4XX
 * TMA1036
 *
 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
 * Copyright (C) 2013 Cypress Semiconductor
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2, and only version 2, as published by the
 * Free Software Foundation.
 *
 * 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.
 *
 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
 *
 */

#include "cyttsp4_core.h"

#include <linux/i2c.h>
#include <linux/input.h>

#define CYTTSP4_I2C_DATA_SIZE	(3 * 256)

static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
	.bustype	= BUS_I2C,
	.write		= cyttsp_i2c_write_block_data,
	.read           = cyttsp_i2c_read_block_data,
};

static int cyttsp4_i2c_probe(struct i2c_client *client,
				      const struct i2c_device_id *id)
{
	struct cyttsp4 *ts;

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		dev_err(&client->dev, "I2C functionality not Supported\n");
		return -EIO;
	}

	ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
			  CYTTSP4_I2C_DATA_SIZE);

	if (IS_ERR(ts))
		return PTR_ERR(ts);

	return 0;
}

static int cyttsp4_i2c_remove(struct i2c_client *client)
{
	struct cyttsp4 *ts = i2c_get_clientdata(client);

	cyttsp4_remove(ts);

	return 0;
}

static const struct i2c_device_id cyttsp4_i2c_id[] = {
	{ CYTTSP4_I2C_NAME, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);

static struct i2c_driver cyttsp4_i2c_driver = {
	.driver = {
		.name	= CYTTSP4_I2C_NAME,
		.owner	= THIS_MODULE,
		.pm	= &cyttsp4_pm_ops,
	},
	.probe		= cyttsp4_i2c_probe,
	.remove		= cyttsp4_i2c_remove,
	.id_table	= cyttsp4_i2c_id,
};

module_i2c_driver(cyttsp4_i2c_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
MODULE_AUTHOR("Cypress");
MODULE_ALIAS("i2c:cyttsp4");