1 /*
2  * cyttsp_i2c.c
3  * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
4  * For use with Cypress  Txx4xx parts.
5  * Supported parts include:
6  * TMA4XX
7  * TMA1036
8  *
9  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
10  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
11  * Copyright (C) 2013 Cypress Semiconductor
12  *
13  * This program is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU General Public License
15  * version 2, and only version 2, as published by the
16  * Free Software Foundation.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
24  *
25  */
26 
27 #include "cyttsp4_core.h"
28 
29 #include <linux/i2c.h>
30 #include <linux/input.h>
31 
32 #define CYTTSP4_I2C_DATA_SIZE	(3 * 256)
33 
34 static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
35 	.bustype	= BUS_I2C,
36 	.write		= cyttsp_i2c_write_block_data,
37 	.read           = cyttsp_i2c_read_block_data,
38 };
39 
40 static int cyttsp4_i2c_probe(struct i2c_client *client,
41 				      const struct i2c_device_id *id)
42 {
43 	struct cyttsp4 *ts;
44 
45 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
46 		dev_err(&client->dev, "I2C functionality not Supported\n");
47 		return -EIO;
48 	}
49 
50 	ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
51 			  CYTTSP4_I2C_DATA_SIZE);
52 
53 	if (IS_ERR(ts))
54 		return PTR_ERR(ts);
55 
56 	return 0;
57 }
58 
59 static int cyttsp4_i2c_remove(struct i2c_client *client)
60 {
61 	struct cyttsp4 *ts = i2c_get_clientdata(client);
62 
63 	cyttsp4_remove(ts);
64 
65 	return 0;
66 }
67 
68 static const struct i2c_device_id cyttsp4_i2c_id[] = {
69 	{ CYTTSP4_I2C_NAME, 0 },
70 	{ }
71 };
72 MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
73 
74 static struct i2c_driver cyttsp4_i2c_driver = {
75 	.driver = {
76 		.name	= CYTTSP4_I2C_NAME,
77 		.owner	= THIS_MODULE,
78 		.pm	= &cyttsp4_pm_ops,
79 	},
80 	.probe		= cyttsp4_i2c_probe,
81 	.remove		= cyttsp4_i2c_remove,
82 	.id_table	= cyttsp4_i2c_id,
83 };
84 
85 module_i2c_driver(cyttsp4_i2c_driver);
86 
87 MODULE_LICENSE("GPL");
88 MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
89 MODULE_AUTHOR("Cypress");
90 MODULE_ALIAS("i2c:cyttsp4");
91