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 
30 static 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 
46 static void cyttsp4_i2c_remove(struct i2c_client *client)
47 {
48 	struct cyttsp4 *ts = i2c_get_clientdata(client);
49 
50 	cyttsp4_remove(ts);
51 }
52 
53 static const struct i2c_device_id cyttsp4_i2c_id[] = {
54 	{ CYTTSP4_I2C_NAME, 0 },
55 	{ }
56 };
57 MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
58 
59 static struct i2c_driver cyttsp4_i2c_driver = {
60 	.driver = {
61 		.name	= CYTTSP4_I2C_NAME,
62 		.pm	= &cyttsp4_pm_ops,
63 	},
64 	.probe		= cyttsp4_i2c_probe,
65 	.remove		= cyttsp4_i2c_remove,
66 	.id_table	= cyttsp4_i2c_id,
67 };
68 
69 module_i2c_driver(cyttsp4_i2c_driver);
70 
71 MODULE_LICENSE("GPL");
72 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
73 MODULE_AUTHOR("Cypress");
74