1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * TSC2005 touchscreen driver |
4 | * |
5 | * Copyright (C) 2006-2010 Nokia Corporation |
6 | * Copyright (C) 2015 QWERTY Embedded Design |
7 | * Copyright (C) 2015 EMAC Inc. |
8 | * |
9 | * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com> |
10 | */ |
11 | |
12 | #include <linux/input.h> |
13 | #include <linux/module.h> |
14 | #include <linux/of.h> |
15 | #include <linux/spi/spi.h> |
16 | #include <linux/regmap.h> |
17 | #include "tsc200x-core.h" |
18 | |
19 | static const struct input_id tsc2005_input_id = { |
20 | .bustype = BUS_SPI, |
21 | .product = 2005, |
22 | }; |
23 | |
24 | static int tsc2005_cmd(struct device *dev, u8 cmd) |
25 | { |
26 | u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd; |
27 | struct spi_transfer xfer = { |
28 | .tx_buf = &tx, |
29 | .len = 1, |
30 | .bits_per_word = 8, |
31 | }; |
32 | struct spi_message msg; |
33 | struct spi_device *spi = to_spi_device(dev); |
34 | int error; |
35 | |
36 | spi_message_init(m: &msg); |
37 | spi_message_add_tail(t: &xfer, m: &msg); |
38 | |
39 | error = spi_sync(spi, message: &msg); |
40 | if (error) { |
41 | dev_err(dev, "%s: failed, command: %x, spi error: %d\n" , |
42 | __func__, cmd, error); |
43 | return error; |
44 | } |
45 | |
46 | return 0; |
47 | } |
48 | |
49 | static int tsc2005_probe(struct spi_device *spi) |
50 | { |
51 | int error; |
52 | |
53 | spi->mode = SPI_MODE_0; |
54 | spi->bits_per_word = 8; |
55 | if (!spi->max_speed_hz) |
56 | spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ; |
57 | |
58 | error = spi_setup(spi); |
59 | if (error) |
60 | return error; |
61 | |
62 | return tsc200x_probe(dev: &spi->dev, irq: spi->irq, tsc_id: &tsc2005_input_id, |
63 | devm_regmap_init_spi(spi, &tsc200x_regmap_config), |
64 | tsc200x_cmd: tsc2005_cmd); |
65 | } |
66 | |
67 | static void tsc2005_remove(struct spi_device *spi) |
68 | { |
69 | tsc200x_remove(dev: &spi->dev); |
70 | } |
71 | |
72 | #ifdef CONFIG_OF |
73 | static const struct of_device_id tsc2005_of_match[] = { |
74 | { .compatible = "ti,tsc2005" }, |
75 | { /* sentinel */ } |
76 | }; |
77 | MODULE_DEVICE_TABLE(of, tsc2005_of_match); |
78 | #endif |
79 | |
80 | static struct spi_driver tsc2005_driver = { |
81 | .driver = { |
82 | .name = "tsc2005" , |
83 | .of_match_table = of_match_ptr(tsc2005_of_match), |
84 | .pm = pm_sleep_ptr(&tsc200x_pm_ops), |
85 | }, |
86 | .probe = tsc2005_probe, |
87 | .remove = tsc2005_remove, |
88 | }; |
89 | module_spi_driver(tsc2005_driver); |
90 | |
91 | MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>" ); |
92 | MODULE_DESCRIPTION("TSC2005 Touchscreen Driver" ); |
93 | MODULE_LICENSE("GPL" ); |
94 | MODULE_ALIAS("spi:tsc2005" ); |
95 | |