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 | |
31 | static int cyttsp_i2c_probe(struct i2c_client *client) |
32 | { |
33 | struct cyttsp *ts; |
34 | |
35 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C)) { |
36 | dev_err(&client->dev, "I2C functionality not Supported\n" ); |
37 | return -EIO; |
38 | } |
39 | |
40 | ts = cyttsp_probe(bus_ops: &cyttsp_i2c_bus_ops, dev: &client->dev, irq: client->irq, |
41 | CY_I2C_DATA_SIZE); |
42 | |
43 | if (IS_ERR(ptr: ts)) |
44 | return PTR_ERR(ptr: ts); |
45 | |
46 | i2c_set_clientdata(client, data: 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 = 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 | |