tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * TSC2004 touchscreen driver
3 *
4 * Copyright (C) 2015 QWERTY Embedded Design
5 * Copyright (C) 2015 EMAC Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/module.h>
19#include <linux/input.h>
20#include <linux/of.h>
21#include <linux/i2c.h>
22#include <linux/regmap.h>
23#include "tsc200x-core.h"
24
25static int tsc2004_cmd(struct device *dev, u8 cmd)
26{
27 u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
28 s32 data;
29 struct i2c_client *i2c = to_i2c_client(dev);
30
31 data = i2c_smbus_write_byte(i2c, tx);
32 if (data < 0) {
33 dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
34 __func__, cmd, data);
35 return data;
36 }
37
38 return 0;
39}
40
41static int tsc2004_probe(struct i2c_client *i2c,
42 const struct i2c_device_id *id)
43
44{
45 return tsc200x_probe(&i2c->dev, i2c->irq, BUS_I2C,
46 devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
47 tsc2004_cmd);
48}
49
50static int tsc2004_remove(struct i2c_client *i2c)
51{
52 return tsc200x_remove(&i2c->dev);
53}
54
55static const struct i2c_device_id tsc2004_idtable[] = {
56 { "tsc2004", 0 },
57 { }
58};
59MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
60
61#ifdef CONFIG_OF
62static const struct of_device_id tsc2004_of_match[] = {
63 { .compatible = "ti,tsc2004" },
64 { /* sentinel */ }
65};
66MODULE_DEVICE_TABLE(of, tsc2004_of_match);
67#endif
68
69static struct i2c_driver tsc2004_driver = {
70 .driver = {
71 .name = "tsc2004",
72 .of_match_table = of_match_ptr(tsc2004_of_match),
73 .pm = &tsc200x_pm_ops,
74 },
75 .id_table = tsc2004_idtable,
76 .probe = tsc2004_probe,
77 .remove = tsc2004_remove,
78};
79module_i2c_driver(tsc2004_driver);
80
81MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
82MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
83MODULE_LICENSE("GPL");