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[karo-tx-linux.git] / drivers / input / touchscreen / cyttsp_i2c.c
1 /*
2  * cyttsp_i2c.c
3  * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
4  * For use with Cypress Txx3xx parts.
5  * Supported parts include:
6  * CY8CTST341
7  * CY8CTMA340
8  *
9  * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
10  * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License
14  * version 2, and only version 2, as published by the
15  * Free Software Foundation.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
23  *
24  */
25
26 #include "cyttsp_core.h"
27
28 #include <linux/i2c.h>
29 #include <linux/input.h>
30
31 #define CY_I2C_DATA_SIZE        128
32
33 static const struct cyttsp_bus_ops cyttsp_i2c_bus_ops = {
34         .bustype        = BUS_I2C,
35         .write          = cyttsp_i2c_write_block_data,
36         .read           = cyttsp_i2c_read_block_data,
37 };
38
39 static int cyttsp_i2c_probe(struct i2c_client *client,
40                                       const struct i2c_device_id *id)
41 {
42         struct cyttsp *ts;
43
44         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
45                 dev_err(&client->dev, "I2C functionality not Supported\n");
46                 return -EIO;
47         }
48
49         ts = cyttsp_probe(&cyttsp_i2c_bus_ops, &client->dev, client->irq,
50                           CY_I2C_DATA_SIZE);
51
52         if (IS_ERR(ts))
53                 return PTR_ERR(ts);
54
55         i2c_set_clientdata(client, ts);
56         return 0;
57 }
58
59 static int cyttsp_i2c_remove(struct i2c_client *client)
60 {
61         struct cyttsp *ts = i2c_get_clientdata(client);
62
63         cyttsp_remove(ts);
64
65         return 0;
66 }
67
68 static const struct i2c_device_id cyttsp_i2c_id[] = {
69         { CY_I2C_NAME, 0 },
70         { }
71 };
72 MODULE_DEVICE_TABLE(i2c, cyttsp_i2c_id);
73
74 static struct i2c_driver cyttsp_i2c_driver = {
75         .driver = {
76                 .name   = CY_I2C_NAME,
77                 .owner  = THIS_MODULE,
78                 .pm     = &cyttsp_pm_ops,
79         },
80         .probe          = cyttsp_i2c_probe,
81         .remove         = cyttsp_i2c_remove,
82         .id_table       = cyttsp_i2c_id,
83 };
84
85 module_i2c_driver(cyttsp_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:cyttsp");