1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * cyttsp_i2c.c
4 * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
5 * For use with Cypress Txx4xx parts.
6 * Supported parts include:
7 * TMA4XX
8 * TMA1036
9 *
10 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
11 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
12 * Copyright (C) 2013 Cypress Semiconductor
13 *
14 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
15 */
16
17#include "cyttsp4_core.h"
18
19#include <linux/i2c.h>
20#include <linux/input.h>
21
22#define CYTTSP4_I2C_DATA_SIZE (3 * 256)
23
24static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
25 .bustype = BUS_I2C,
26 .write = cyttsp_i2c_write_block_data,
27 .read = cyttsp_i2c_read_block_data,
28};
29
30static int cyttsp4_i2c_probe(struct i2c_client *client)
31{
32 struct cyttsp4 *ts;
33
34 if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C)) {
35 dev_err(&client->dev, "I2C functionality not Supported\n");
36 return -EIO;
37 }
38
39 ts = cyttsp4_probe(ops: &cyttsp4_i2c_bus_ops, dev: &client->dev, irq: client->irq,
40 CYTTSP4_I2C_DATA_SIZE);
41
42 return PTR_ERR_OR_ZERO(ptr: ts);
43}
44
45static void cyttsp4_i2c_remove(struct i2c_client *client)
46{
47 struct cyttsp4 *ts = i2c_get_clientdata(client);
48
49 cyttsp4_remove(ts);
50}
51
52static const struct i2c_device_id cyttsp4_i2c_id[] = {
53 { CYTTSP4_I2C_NAME, 0 },
54 { }
55};
56MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
57
58static struct i2c_driver cyttsp4_i2c_driver = {
59 .driver = {
60 .name = CYTTSP4_I2C_NAME,
61 .pm = pm_ptr(&cyttsp4_pm_ops),
62 },
63 .probe = cyttsp4_i2c_probe,
64 .remove = cyttsp4_i2c_remove,
65 .id_table = cyttsp4_i2c_id,
66};
67
68module_i2c_driver(cyttsp4_i2c_driver);
69
70MODULE_LICENSE("GPL");
71MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
72MODULE_AUTHOR("Cypress");
73

source code of linux/drivers/input/touchscreen/cyttsp4_i2c.c