/* * 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_OFstatic 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");