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				      const struct i2c_device_id *id)
32{
33	struct cyttsp4 *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 = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
41			  CYTTSP4_I2C_DATA_SIZE);
42
43	return PTR_ERR_OR_ZERO(ts);
44}
45
46static int cyttsp4_i2c_remove(struct i2c_client *client)
47{
48	struct cyttsp4 *ts = i2c_get_clientdata(client);
49
50	cyttsp4_remove(ts);
51
52	return 0;
53}
54
55static const struct i2c_device_id cyttsp4_i2c_id[] = {
56	{ CYTTSP4_I2C_NAME, 0 },
57	{ }
58};
59MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
60
61static struct i2c_driver cyttsp4_i2c_driver = {
62	.driver = {
63		.name	= CYTTSP4_I2C_NAME,
64		.pm	= &cyttsp4_pm_ops,
65	},
66	.probe		= cyttsp4_i2c_probe,
67	.remove		= cyttsp4_i2c_remove,
68	.id_table	= cyttsp4_i2c_id,
69};
70
71module_i2c_driver(cyttsp4_i2c_driver);
72
73MODULE_LICENSE("GPL");
74MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
75MODULE_AUTHOR("Cypress");