1/*
2 * Copyright (C) 2009 Wolfram Sang, Pengutronix
3 *
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.
7 *
8 * Check max730x.c for further details.
9 */
10
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>
18
19static int max7300_i2c_write(struct device *dev, unsigned int reg,
20				unsigned int val)
21{
22	struct i2c_client *client = to_i2c_client(dev);
23
24	return i2c_smbus_write_byte_data(client, reg, val);
25}
26
27static int max7300_i2c_read(struct device *dev, unsigned int reg)
28{
29	struct i2c_client *client = to_i2c_client(dev);
30
31	return i2c_smbus_read_byte_data(client, reg);
32}
33
34static int max7300_probe(struct i2c_client *client,
35			 const struct i2c_device_id *id)
36{
37	struct max7301 *ts;
38
39	if (!i2c_check_functionality(client->adapter,
40			I2C_FUNC_SMBUS_BYTE_DATA))
41		return -EIO;
42
43	ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
44	if (!ts)
45		return -ENOMEM;
46
47	ts->read = max7300_i2c_read;
48	ts->write = max7300_i2c_write;
49	ts->dev = &client->dev;
50
51	return __max730x_probe(ts);
52}
53
54static int max7300_remove(struct i2c_client *client)
55{
56	return __max730x_remove(&client->dev);
57}
58
59static const struct i2c_device_id max7300_id[] = {
60	{ "max7300", 0 },
61	{ }
62};
63MODULE_DEVICE_TABLE(i2c, max7300_id);
64
65static struct i2c_driver max7300_driver = {
66	.driver = {
67		.name = "max7300",
68		.owner = THIS_MODULE,
69	},
70	.probe = max7300_probe,
71	.remove = max7300_remove,
72	.id_table = max7300_id,
73};
74
75static int __init max7300_init(void)
76{
77	return i2c_add_driver(&max7300_driver);
78}
79subsys_initcall(max7300_init);
80
81static void __exit max7300_exit(void)
82{
83	i2c_del_driver(&max7300_driver);
84}
85module_exit(max7300_exit);
86
87MODULE_AUTHOR("Wolfram Sang");
88MODULE_LICENSE("GPL v2");
89MODULE_DESCRIPTION("MAX7300 GPIO-Expander");
90