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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/*
* /driver/sensors/sensors_core.c
*
* Copyright (C) 2011 Samsung Electronics Co.Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/err.h>
#include <linux/sensor/sensors_core.h>
struct class *sensors_class;
/**
* sensors_classdev_register - create new sensor device in sensors_class.
* @dev: The device to register.
*/
static void set_sensor_attr(struct device *dev,
struct device_attribute *attributes[])
{
int i;
for (i = 0; attributes[i] != NULL; i++) {
if ((device_create_file(dev, attributes[i])) < 0) {
printk(KERN_ERR"[SENSOR CORE] create_file attributes %d\n",
i);
}
}
}
struct device *sensors_classdev_register(char *sensors_name)
{
struct device *dev;
int retval = -ENODEV;
dev = device_create(sensors_class, NULL, 0,
NULL, "%s", sensors_name);
if (IS_ERR(dev))
return ERR_PTR(retval);
printk(KERN_INFO "Registered sensors device: %s\n", sensors_name);
return dev;
}
EXPORT_SYMBOL_GPL(sensors_classdev_register);
/**
* sensors_classdev_unregister - unregisters a object of sensor device.
*
*/
void sensors_classdev_unregister(struct device *dev)
{
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(sensors_classdev_unregister);
int sensors_register(struct device *dev, void *drvdata,
struct device_attribute *attributes[], char *name)
{
int ret = 0;
if (!sensors_class) {
sensors_class = class_create(THIS_MODULE, "sensors");
if (IS_ERR(sensors_class))
return PTR_ERR(sensors_class);
}
dev = device_create(sensors_class, NULL, 0, drvdata, "%s", name);
if (IS_ERR(dev)) {
ret = PTR_ERR(dev);
printk(KERN_ERR "[SENSORS CORE] device_create failed! [%d]\n",
ret);
return ret;
}
set_sensor_attr(dev, attributes);
return 0;
}
EXPORT_SYMBOL_GPL(sensors_register);
void sensors_unregister(struct device *dev)
{
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(sensors_unregister);
static int __init sensors_class_init(void)
{
sensors_class = class_create(THIS_MODULE, "sensors");
if (IS_ERR(sensors_class)) {
pr_err("Failed to create class(sensors)!\n");
return PTR_ERR(sensors_class);
}
return 0;
}
static void __exit sensors_class_exit(void)
{
class_destroy(sensors_class);
}
subsys_initcall(sensors_class_init);
module_exit(sensors_class_exit);
MODULE_DESCRIPTION("Universal sensors core class");
MODULE_AUTHOR("Samsung Electronics");
MODULE_LICENSE("GPL");
|
