linux_dsm_epyc7002/drivers/input/touchscreen/tsc2005.c
Linus Torvalds a30b7ca289 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull more input updates from Dmitry Torokhov:
 "An update to the tsc2005 driver that allows it to also support tsc2004
  (basically the same controller, but uses i2c instead of spi bus), and
  a couple of bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: parkbd - drop bogus __init from parkbd_allocate_serio()
  Input: elantech - add Fujitsu Lifebook U745 to force crc_enabled
  Input: tsc2004 - add support for tsc2004
  Input: tsc200x-core - rename functions and variables
  Input: tsc2005 - separate SPI and core functions
2015-11-13 21:41:14 -08:00

89 lines
2.2 KiB
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/module.h>
#include <linux/input.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include "tsc200x-core.h"
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, BUS_SPI,
devm_regmap_init_spi(spi, &tsc200x_regmap_config),
tsc2005_cmd);
}
static int tsc2005_remove(struct spi_device *spi)
{
return tsc200x_remove(&spi->dev);
}
static struct spi_driver tsc2005_driver = {
.driver = {
.name = "tsc2005",
.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");