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/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 const struct input_id tsc2005_input_id = {
28	.bustype = BUS_SPI,
29	.product = 2005,
30};
31
32static int tsc2005_cmd(struct device *dev, u8 cmd)
33{
34	u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
35	struct spi_transfer xfer = {
36		.tx_buf         = &tx,
37		.len            = 1,
38		.bits_per_word  = 8,
39	};
40	struct spi_message msg;
41	struct spi_device *spi = to_spi_device(dev);
42	int error;
43
44	spi_message_init(&msg);
45	spi_message_add_tail(&xfer, &msg);
46
47	error = spi_sync(spi, &msg);
48	if (error) {
49		dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
50			__func__, cmd, error);
51		return error;
52	}
53
54	return 0;
55}
56
57static int tsc2005_probe(struct spi_device *spi)
58{
59	int error;
60
61	spi->mode = SPI_MODE_0;
62	spi->bits_per_word = 8;
63	if (!spi->max_speed_hz)
64		spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
65
66	error = spi_setup(spi);
67	if (error)
68		return error;
69
70	return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
71			     devm_regmap_init_spi(spi, &tsc200x_regmap_config),
72			     tsc2005_cmd);
73}
74
75static int tsc2005_remove(struct spi_device *spi)
76{
77	return tsc200x_remove(&spi->dev);
78}
79
80static struct spi_driver tsc2005_driver = {
81	.driver	= {
82		.name	= "tsc2005",
83		.pm	= &tsc200x_pm_ops,
84	},
85	.probe	= tsc2005_probe,
86	.remove	= tsc2005_remove,
87};
88module_spi_driver(tsc2005_driver);
89
90MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
91MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
92MODULE_LICENSE("GPL");
93MODULE_ALIAS("spi:tsc2005");