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");
91