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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
a748941c MW |
2 | /* |
3 | * TSC2004 touchscreen driver | |
4 | * | |
5 | * Copyright (C) 2015 QWERTY Embedded Design | |
6 | * Copyright (C) 2015 EMAC Inc. | |
a748941c MW |
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 | ||
e9003c9c MW |
16 | static const struct input_id tsc2004_input_id = { |
17 | .bustype = BUS_I2C, | |
18 | .product = 2004, | |
19 | }; | |
20 | ||
a748941c MW |
21 | static 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 | ||
37 | static int tsc2004_probe(struct i2c_client *i2c, | |
38 | const struct i2c_device_id *id) | |
39 | ||
40 | { | |
e9003c9c | 41 | return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id, |
a748941c MW |
42 | devm_regmap_init_i2c(i2c, &tsc200x_regmap_config), |
43 | tsc2004_cmd); | |
44 | } | |
45 | ||
46 | static int tsc2004_remove(struct i2c_client *i2c) | |
47 | { | |
48 | return tsc200x_remove(&i2c->dev); | |
49 | } | |
50 | ||
51 | static const struct i2c_device_id tsc2004_idtable[] = { | |
52 | { "tsc2004", 0 }, | |
53 | { } | |
54 | }; | |
55 | MODULE_DEVICE_TABLE(i2c, tsc2004_idtable); | |
56 | ||
57 | #ifdef CONFIG_OF | |
58 | static const struct of_device_id tsc2004_of_match[] = { | |
59 | { .compatible = "ti,tsc2004" }, | |
60 | { /* sentinel */ } | |
61 | }; | |
62 | MODULE_DEVICE_TABLE(of, tsc2004_of_match); | |
63 | #endif | |
64 | ||
65 | static struct i2c_driver tsc2004_driver = { | |
66 | .driver = { | |
67 | .name = "tsc2004", | |
68 | .of_match_table = of_match_ptr(tsc2004_of_match), | |
69 | .pm = &tsc200x_pm_ops, | |
70 | }, | |
71 | .id_table = tsc2004_idtable, | |
72 | .probe = tsc2004_probe, | |
73 | .remove = tsc2004_remove, | |
74 | }; | |
75 | module_i2c_driver(tsc2004_driver); | |
76 | ||
77 | MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>"); | |
78 | MODULE_DESCRIPTION("TSC2004 Touchscreen Driver"); | |
79 | MODULE_LICENSE("GPL"); |