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
24 static 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
cyttsp4_i2c_probe(struct i2c_client * client)30 static int cyttsp4_i2c_probe(struct i2c_client *client)
31 {
32 struct cyttsp4 *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 = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
40 CYTTSP4_I2C_DATA_SIZE);
41
42 return PTR_ERR_OR_ZERO(ts);
43 }
44
cyttsp4_i2c_remove(struct i2c_client * client)45 static void cyttsp4_i2c_remove(struct i2c_client *client)
46 {
47 struct cyttsp4 *ts = i2c_get_clientdata(client);
48
49 cyttsp4_remove(ts);
50 }
51
52 static const struct i2c_device_id cyttsp4_i2c_id[] = {
53 { CYTTSP4_I2C_NAME, 0 },
54 { }
55 };
56 MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
57
58 static struct i2c_driver cyttsp4_i2c_driver = {
59 .driver = {
60 .name = CYTTSP4_I2C_NAME,
61 .pm = pm_ptr(&cyttsp4_pm_ops),
62 },
63 .probe = cyttsp4_i2c_probe,
64 .remove = cyttsp4_i2c_remove,
65 .id_table = cyttsp4_i2c_id,
66 };
67
68 module_i2c_driver(cyttsp4_i2c_driver);
69
70 MODULE_LICENSE("GPL");
71 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
72 MODULE_AUTHOR("Cypress");
73