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/module.h>
22#include <linux/input.h>
 
 
23#include <linux/spi/spi.h>
24#include <linux/regmap.h>
25#include "tsc200x-core.h"
26
 
 
 
 
 
27static int tsc2005_cmd(struct device *dev, u8 cmd)
28{
29	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
30	struct spi_transfer xfer = {
31		.tx_buf         = &tx,
32		.len            = 1,
33		.bits_per_word  = 8,
34	};
35	struct spi_message msg;
36	struct spi_device *spi = to_spi_device(dev);
37	int error;
38
39	spi_message_init(&msg);
40	spi_message_add_tail(&xfer, &msg);
41
42	error = spi_sync(spi, &msg);
43	if (error) {
44		dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
45			__func__, cmd, error);
46		return error;
47	}
48
49	return 0;
50}
51
52static int tsc2005_probe(struct spi_device *spi)
53{
54	int error;
55
56	spi->mode = SPI_MODE_0;
57	spi->bits_per_word = 8;
58	if (!spi->max_speed_hz)
59		spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
60
61	error = spi_setup(spi);
62	if (error)
63		return error;
64
65	return tsc200x_probe(&spi->dev, spi->irq, BUS_SPI,
66			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
67			     tsc2005_cmd);
68}
69
70static int tsc2005_remove(struct spi_device *spi)
71{
72	return tsc200x_remove(&spi->dev);
73}
74
 
 
 
 
 
 
 
 
75static struct spi_driver tsc2005_driver = {
76	.driver	= {
77		.name	= "tsc2005",
 
78		.pm	= &tsc200x_pm_ops,
79	},
80	.probe	= tsc2005_probe,
81	.remove	= tsc2005_remove,
82};
83module_spi_driver(tsc2005_driver);
84
85MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
86MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
87MODULE_LICENSE("GPL");
88MODULE_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");