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_DATA_SIZE	128
22
23static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
24	.bustype	= BUS_I2C,
25	.write		= cyttsp_i2c_write_block_data,
26	.read           = cyttsp_i2c_read_block_data,
27};
28
29static int cyttsp_i2c_probe(struct i2c_client *client,
30				      const struct i2c_device_id *id)
31{
32	struct cyttsp *ts;
33
34	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
35		dev_err(&client->dev, "I2C functionality not Supported\n");
36		return -EIO;
37	}
38
39	ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
40			  CY_I2C_DATA_SIZE);
41
42	if (IS_ERR(ts))
43		return PTR_ERR(ts);
44
45	i2c_set_clientdata(client, ts);
46	return 0;
47}
48
49static const struct i2c_device_id cyttsp_i2c_id[] = {
50	{ CY_I2C_NAME, 0 },
51	{ }
52};
53MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
54
55static struct i2c_driver cyttsp_i2c_driver = {
56	.driver = {
57		.name	= CY_I2C_NAME,
58		.pm	= &cyttsp_pm_ops,
59	},
60	.probe		= cyttsp_i2c_probe,
61	.id_table	= cyttsp_i2c_id,
62};
63
64module_i2c_driver(cyttsp_i2c_driver);
65
66MODULE_LICENSE("GPL");
67MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
68MODULE_AUTHOR("Cypress");