HID: Add device IDs for more SJOY adapters
[linux/fpc-iii.git] / drivers / gpio / gpio-max7300.c
bloba5ca0ab1b372cb419a73cc7fd8101258e311c76e
1 /*
2 * Copyright (C) 2009 Wolfram Sang, Pengutronix
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * Check max730x.c for further details.
9 */
11 #include <linux/module.h>
12 #include <linux/init.h>
13 #include <linux/platform_device.h>
14 #include <linux/mutex.h>
15 #include <linux/i2c.h>
16 #include <linux/spi/max7301.h>
17 #include <linux/slab.h>
19 static int max7300_i2c_write(struct device *dev, unsigned int reg,
20 unsigned int val)
22 struct i2c_client *client = to_i2c_client(dev);
24 return i2c_smbus_write_byte_data(client, reg, val);
27 static int max7300_i2c_read(struct device *dev, unsigned int reg)
29 struct i2c_client *client = to_i2c_client(dev);
31 return i2c_smbus_read_byte_data(client, reg);
34 static int __devinit max7300_probe(struct i2c_client *client,
35 const struct i2c_device_id *id)
37 struct max7301 *ts;
38 int ret;
40 if (!i2c_check_functionality(client->adapter,
41 I2C_FUNC_SMBUS_BYTE_DATA))
42 return -EIO;
44 ts = kzalloc(sizeof(struct max7301), GFP_KERNEL);
45 if (!ts)
46 return -ENOMEM;
48 ts->read = max7300_i2c_read;
49 ts->write = max7300_i2c_write;
50 ts->dev = &client->dev;
52 ret = __max730x_probe(ts);
53 if (ret)
54 kfree(ts);
55 return ret;
58 static int __devexit max7300_remove(struct i2c_client *client)
60 return __max730x_remove(&client->dev);
63 static const struct i2c_device_id max7300_id[] = {
64 { "max7300", 0 },
65 { }
67 MODULE_DEVICE_TABLE(i2c, max7300_id);
69 static struct i2c_driver max7300_driver = {
70 .driver = {
71 .name = "max7300",
72 .owner = THIS_MODULE,
74 .probe = max7300_probe,
75 .remove = __devexit_p(max7300_remove),
76 .id_table = max7300_id,
79 static int __init max7300_init(void)
81 return i2c_add_driver(&max7300_driver);
83 subsys_initcall(max7300_init);
85 static void __exit max7300_exit(void)
87 i2c_del_driver(&max7300_driver);
89 module_exit(max7300_exit);
91 MODULE_AUTHOR("Wolfram Sang");
92 MODULE_LICENSE("GPL v2");
93 MODULE_DESCRIPTION("MAX7300 GPIO-Expander");