cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tsc2004.c (1808B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * TSC2004 touchscreen driver
      4 *
      5 * Copyright (C) 2015 QWERTY Embedded Design
      6 * Copyright (C) 2015 EMAC Inc.
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/input.h>
     11#include <linux/of.h>
     12#include <linux/i2c.h>
     13#include <linux/regmap.h>
     14#include "tsc200x-core.h"
     15
     16static const struct input_id tsc2004_input_id = {
     17	.bustype = BUS_I2C,
     18	.product = 2004,
     19};
     20
     21static int tsc2004_cmd(struct device *dev, u8 cmd)
     22{
     23	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
     24	s32 data;
     25	struct i2c_client *i2c = to_i2c_client(dev);
     26
     27	data = i2c_smbus_write_byte(i2c, tx);
     28	if (data < 0) {
     29		dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
     30			__func__, cmd, data);
     31		return data;
     32	}
     33
     34	return 0;
     35}
     36
     37static int tsc2004_probe(struct i2c_client *i2c,
     38			 const struct i2c_device_id *id)
     39
     40{
     41	return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id,
     42			     devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
     43			     tsc2004_cmd);
     44}
     45
     46static int tsc2004_remove(struct i2c_client *i2c)
     47{
     48	tsc200x_remove(&i2c->dev);
     49
     50	return 0;
     51}
     52
     53static const struct i2c_device_id tsc2004_idtable[] = {
     54	{ "tsc2004", 0 },
     55	{ }
     56};
     57MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
     58
     59#ifdef CONFIG_OF
     60static const struct of_device_id tsc2004_of_match[] = {
     61	{ .compatible = "ti,tsc2004" },
     62	{ /* sentinel */ }
     63};
     64MODULE_DEVICE_TABLE(of, tsc2004_of_match);
     65#endif
     66
     67static struct i2c_driver tsc2004_driver = {
     68	.driver = {
     69		.name   = "tsc2004",
     70		.of_match_table = of_match_ptr(tsc2004_of_match),
     71		.pm     = &tsc200x_pm_ops,
     72	},
     73	.id_table       = tsc2004_idtable,
     74	.probe          = tsc2004_probe,
     75	.remove         = tsc2004_remove,
     76};
     77module_i2c_driver(tsc2004_driver);
     78
     79MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
     80MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
     81MODULE_LICENSE("GPL");