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
 
 
 
 
 
67#ifdef CONFIG_OF
68static const struct of_device_id tsc2005_of_match[] = {
69	{ .compatible = "ti,tsc2005" },
70	{ /* sentinel */ }
71};
72MODULE_DEVICE_TABLE(of, tsc2005_of_match);
73#endif
74
75static struct spi_driver tsc2005_driver = {
76	.driver	= {
77		.name		= "tsc2005",
78		.dev_groups	= tsc200x_groups,
79		.of_match_table	= of_match_ptr(tsc2005_of_match),
80		.pm		= pm_sleep_ptr(&tsc200x_pm_ops),
81	},
82	.probe	= tsc2005_probe,
 
83};
84module_spi_driver(tsc2005_driver);
85
86MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
87MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
88MODULE_LICENSE("GPL");
89MODULE_ALIAS("spi:tsc2005");

 
  1/*
  2 * TSC2005 touchscreen driver
  3 *
  4 * Copyright (C) 2006-2010 Nokia Corporation
  5 * Copyright (C) 2015 QWERTY Embedded Design
  6 * Copyright (C) 2015 EMAC Inc.
  7 *
  8 * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
  9 *
 10 * This program is free software; you can redistribute it and/or modify
 11 * it under the terms of the GNU General Public License as published by
 12 * the Free Software Foundation; either version 2 of the License, or
 13 * (at your option) any later version.
 14 *
 15 * This program is distributed in the hope that it will be useful,
 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 18 * GNU General Public License for more details.
 19 */
 20
 21#include <linux/input.h>
 22#include <linux/module.h>
 23#include <linux/of.h>
 24#include <linux/spi/spi.h>
 25#include <linux/regmap.h>
 26#include "tsc200x-core.h"
 27
 28static const struct input_id tsc2005_input_id = {
 29	.bustype = BUS_SPI,
 30	.product = 2005,
 31};
 32
 33static int tsc2005_cmd(struct device *dev, u8 cmd)
 34{
 35	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
 36	struct spi_transfer xfer = {
 37		.tx_buf         = &tx,
 38		.len            = 1,
 39		.bits_per_word  = 8,
 40	};
 41	struct spi_message msg;
 42	struct spi_device *spi = to_spi_device(dev);
 43	int error;
 44
 45	spi_message_init(&msg);
 46	spi_message_add_tail(&xfer, &msg);
 47
 48	error = spi_sync(spi, &msg);
 49	if (error) {
 50		dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
 51			__func__, cmd, error);
 52		return error;
 53	}
 54
 55	return 0;
 56}
 57
 58static int tsc2005_probe(struct spi_device *spi)
 59{
 60	int error;
 61
 62	spi->mode = SPI_MODE_0;
 63	spi->bits_per_word = 8;
 64	if (!spi->max_speed_hz)
 65		spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
 66
 67	error = spi_setup(spi);
 68	if (error)
 69		return error;
 70
 71	return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
 72			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
 73			     tsc2005_cmd);
 74}
 75
 76static int tsc2005_remove(struct spi_device *spi)
 77{
 78	return tsc200x_remove(&spi->dev);
 79}
 80
 81#ifdef CONFIG_OF
 82static const struct of_device_id tsc2005_of_match[] = {
 83	{ .compatible = "ti,tsc2005" },
 84	{ /* sentinel */ }
 85};
 86MODULE_DEVICE_TABLE(of, tsc2005_of_match);
 87#endif
 88
 89static struct spi_driver tsc2005_driver = {
 90	.driver	= {
 91		.name	= "tsc2005",
 92		.of_match_table = of_match_ptr(tsc2005_of_match),
 93		.pm	= &tsc200x_pm_ops,
 
 94	},
 95	.probe	= tsc2005_probe,
 96	.remove	= tsc2005_remove,
 97};
 98module_spi_driver(tsc2005_driver);
 99
100MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
101MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
102MODULE_LICENSE("GPL");
103MODULE_ALIAS("spi:tsc2005");