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,const struct i2c_device_id * id)31 static 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
51 static const struct i2c_device_id cyttsp_i2c_id[] = {
52 { CY_I2C_NAME, 0 },
53 { }
54 };
55 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
56
57 static const struct of_device_id cyttsp_of_i2c_match[] = {
58 { .compatible = "cypress,cy8ctma340", },
59 { .compatible = "cypress,cy8ctst341", },
60 { /* sentinel */ }
61 };
62 MODULE_DEVICE_TABLE(of, cyttsp_of_i2c_match);
63
64 static 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
74 module_i2c_driver(cyttsp_i2c_driver);
75
76 MODULE_LICENSE("GPL");
77 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
78 MODULE_AUTHOR("Cypress");
79