1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2009 Wolfram Sang, Pengutronix
*
* Check max730x.c for further details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/i2c.h>
#include <linux/spi/max7301.h>
#include <linux/slab.h>
static int max7300_i2c_write(struct device *dev, unsigned int reg,
unsigned int val)
{
struct i2c_client *client = to_i2c_client(dev);
return i2c_smbus_write_byte_data(client, reg, val);
}
static int max7300_i2c_read(struct device *dev, unsigned int reg)
{
struct i2c_client *client = to_i2c_client(dev);
return i2c_smbus_read_byte_data(client, reg);
}
static int max7300_probe(struct i2c_client *client)
{
struct max7301 *ts;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->read = max7300_i2c_read;
ts->write = max7300_i2c_write;
ts->dev = &client->dev;
return __max730x_probe(ts);
}
static void max7300_remove(struct i2c_client *client)
{
__max730x_remove(&client->dev);
}
static const struct i2c_device_id max7300_id[] = {
{ "max7300" },
{ }
};
MODULE_DEVICE_TABLE(i2c, max7300_id);
static struct i2c_driver max7300_driver = {
.driver = {
.name = "max7300",
},
.probe = max7300_probe,
.remove = max7300_remove,
.id_table = max7300_id,
};
static int __init max7300_init(void)
{
return i2c_add_driver(&max7300_driver);
}
subsys_initcall(max7300_init);
static void __exit max7300_exit(void)
{
i2c_del_driver(&max7300_driver);
}
module_exit(max7300_exit);
MODULE_AUTHOR("Wolfram Sang");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MAX7300 GPIO-Expander");
|
