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
25 static 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
cyttsp_i2c_probe(struct i2c_client * client)31 static 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
50 static const struct i2c_device_id cyttsp_i2c_id[] = {
51 { CY_I2C_NAME, 0 },
52 { }
53 };
54 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
55
56 static const struct of_device_id cyttsp_of_i2c_match[] = {
57 { .compatible = "cypress,cy8ctma340", },
58 { .compatible = "cypress,cy8ctst341", },
59 { /* sentinel */ }
60 };
61 MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
62
63 static 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_new = cyttsp_i2c_probe,
70 .id_table = cyttsp_i2c_id,
71 };
72
73 module_i2c_driver(cyttsp_i2c_driver);
74
75 MODULE_LICENSE("GPL");
76 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
77 MODULE_AUTHOR("Cypress");
78