1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * TSC2005 touchscreen driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2006-2010 Nokia Corporation
6*4882a593Smuzhiyun * Copyright (C) 2015 QWERTY Embedded Design
7*4882a593Smuzhiyun * Copyright (C) 2015 EMAC Inc.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/input.h>
13*4882a593Smuzhiyun #include <linux/module.h>
14*4882a593Smuzhiyun #include <linux/of.h>
15*4882a593Smuzhiyun #include <linux/spi/spi.h>
16*4882a593Smuzhiyun #include <linux/regmap.h>
17*4882a593Smuzhiyun #include "tsc200x-core.h"
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct input_id tsc2005_input_id = {
20*4882a593Smuzhiyun .bustype = BUS_SPI,
21*4882a593Smuzhiyun .product = 2005,
22*4882a593Smuzhiyun };
23*4882a593Smuzhiyun
tsc2005_cmd(struct device * dev,u8 cmd)24*4882a593Smuzhiyun static int tsc2005_cmd(struct device *dev, u8 cmd)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
27*4882a593Smuzhiyun struct spi_transfer xfer = {
28*4882a593Smuzhiyun .tx_buf = &tx,
29*4882a593Smuzhiyun .len = 1,
30*4882a593Smuzhiyun .bits_per_word = 8,
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun struct spi_message msg;
33*4882a593Smuzhiyun struct spi_device *spi = to_spi_device(dev);
34*4882a593Smuzhiyun int error;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun spi_message_init(&msg);
37*4882a593Smuzhiyun spi_message_add_tail(&xfer, &msg);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun error = spi_sync(spi, &msg);
40*4882a593Smuzhiyun if (error) {
41*4882a593Smuzhiyun dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
42*4882a593Smuzhiyun __func__, cmd, error);
43*4882a593Smuzhiyun return error;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return 0;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
tsc2005_probe(struct spi_device * spi)49*4882a593Smuzhiyun static int tsc2005_probe(struct spi_device *spi)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun int error;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun spi->mode = SPI_MODE_0;
54*4882a593Smuzhiyun spi->bits_per_word = 8;
55*4882a593Smuzhiyun if (!spi->max_speed_hz)
56*4882a593Smuzhiyun spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun error = spi_setup(spi);
59*4882a593Smuzhiyun if (error)
60*4882a593Smuzhiyun return error;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
63*4882a593Smuzhiyun devm_regmap_init_spi(spi, &tsc200x_regmap_config),
64*4882a593Smuzhiyun tsc2005_cmd);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
tsc2005_remove(struct spi_device * spi)67*4882a593Smuzhiyun static int tsc2005_remove(struct spi_device *spi)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun return tsc200x_remove(&spi->dev);
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun #ifdef CONFIG_OF
73*4882a593Smuzhiyun static const struct of_device_id tsc2005_of_match[] = {
74*4882a593Smuzhiyun { .compatible = "ti,tsc2005" },
75*4882a593Smuzhiyun { /* sentinel */ }
76*4882a593Smuzhiyun };
77*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, tsc2005_of_match);
78*4882a593Smuzhiyun #endif
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun static struct spi_driver tsc2005_driver = {
81*4882a593Smuzhiyun .driver = {
82*4882a593Smuzhiyun .name = "tsc2005",
83*4882a593Smuzhiyun .of_match_table = of_match_ptr(tsc2005_of_match),
84*4882a593Smuzhiyun .pm = &tsc200x_pm_ops,
85*4882a593Smuzhiyun },
86*4882a593Smuzhiyun .probe = tsc2005_probe,
87*4882a593Smuzhiyun .remove = tsc2005_remove,
88*4882a593Smuzhiyun };
89*4882a593Smuzhiyun module_spi_driver(tsc2005_driver);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
92*4882a593Smuzhiyun MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
93*4882a593Smuzhiyun MODULE_LICENSE("GPL");
94*4882a593Smuzhiyun MODULE_ALIAS("spi:tsc2005");
95