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				      const struct i2c_device_id *id)
33{
34	struct cyttsp *ts;
35
36	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
37		dev_err(&client->dev, "I2C functionality not Supported\n");
38		return -EIO;
39	}
40
41	ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
42			  CY_I2C_DATA_SIZE);
43
44	if (IS_ERR(ts))
45		return PTR_ERR(ts);
46
47	i2c_set_clientdata(client, ts);
48	return 0;
49}
50
51static const struct i2c_device_id cyttsp_i2c_id[] = {
52	{ CY_I2C_NAME, 0 },
53	{ }
54};
55MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
56
57static const struct of_device_id cyttsp_of_i2c_match[] = {
58	{ .compatible = "cypress,cy8ctma340", },
59	{ .compatible = "cypress,cy8ctst341", },
60	{ /* sentinel */ }
61};
62MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
63
64static struct i2c_driver cyttsp_i2c_driver = {
65	.driver = {
66		.name	= CY_I2C_NAME,
67		.pm	= &cyttsp_pm_ops,
68		.of_match_table = cyttsp_of_i2c_match,
69	},
70	.probe		= cyttsp_i2c_probe,
71	.id_table	= cyttsp_i2c_id,
72};
73
74module_i2c_driver(cyttsp_i2c_driver);
75
76MODULE_LICENSE("GPL");
77MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
78MODULE_AUTHOR("Cypress");