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 Txx3xx parts.
6 * Supported parts include:
7 * CY8CTST341
8 * CY8CTMA340
9 *
10 * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
11 * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
12 *
13 * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
14 */
15
16#include "cyttsp_core.h"
17
18#include <linux/i2c.h>
19#include <linux/input.h>
20
21#define CY_I2C_NAME		"cyttsp-i2c"
22
23#define CY_I2C_DATA_SIZE	128
24
25static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
26	.bustype	= BUS_I2C,
27	.write		= cyttsp_i2c_write_block_data,
28	.read           = cyttsp_i2c_read_block_data,
29};
30
31static int cyttsp_i2c_probe(struct i2c_client *client)
32{
33	struct cyttsp *ts;
34
35	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
36		dev_err(&client->dev, "I2C functionality not Supported\n");
37		return -EIO;
38	}
39
40	ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
41			  CY_I2C_DATA_SIZE);
42
43	if (IS_ERR(ts))
44		return PTR_ERR(ts);
45
46	i2c_set_clientdata(client, ts);
47	return 0;
48}
49
50static const struct i2c_device_id cyttsp_i2c_id[] = {
51	{ CY_I2C_NAME, 0 },
52	{ }
53};
54MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
55
56static const struct of_device_id cyttsp_of_i2c_match[] = {
57	{ .compatible = "cypress,cy8ctma340", },
58	{ .compatible = "cypress,cy8ctst341", },
59	{ /* sentinel */ }
60};
61MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
62
63static struct i2c_driver cyttsp_i2c_driver = {
64	.driver = {
65		.name	= CY_I2C_NAME,
66		.pm	= pm_sleep_ptr(&cyttsp_pm_ops),
67		.of_match_table = cyttsp_of_i2c_match,
68	},
69	.probe		= cyttsp_i2c_probe,
70	.id_table	= cyttsp_i2c_id,
71};
72
73module_i2c_driver(cyttsp_i2c_driver);
74
75MODULE_LICENSE("GPL");
76MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
77MODULE_AUTHOR("Cypress");
78