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
19static const struct input_id tsc2005_input_id = {
20	.bustype = BUS_SPI,
21	.product = 2005,
22};
23
24static 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(&msg);
37	spi_message_add_tail(&xfer, &msg);
38
39	error = spi_sync(spi, &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
49static 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(&spi->dev, spi->irq, &tsc2005_input_id,
63			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
64			     tsc2005_cmd);
65}
66
67static void tsc2005_remove(struct spi_device *spi)
68{
69	tsc200x_remove(&spi->dev);
70}
71
72#ifdef CONFIG_OF
73static const struct of_device_id tsc2005_of_match[] = {
74	{ .compatible = "ti,tsc2005" },
75	{ /* sentinel */ }
76};
77MODULE_DEVICE_TABLE(of, tsc2005_of_match);
78#endif
79
80static struct spi_driver tsc2005_driver = {
81	.driver	= {
82		.name		= "tsc2005",
83		.dev_groups	= tsc200x_groups,
84		.of_match_table	= of_match_ptr(tsc2005_of_match),
85		.pm		= pm_sleep_ptr(&tsc200x_pm_ops),
86	},
87	.probe	= tsc2005_probe,
88	.remove	= tsc2005_remove,
89};
90module_spi_driver(tsc2005_driver);
91
92MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
93MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
94MODULE_LICENSE("GPL");
95MODULE_ALIAS("spi:tsc2005");
96