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
|
/*
* Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/delay.h>
static int suspend_counter;
static ktime_t suspend_time;
static ktime_t tmp_time;
static int suspend_counter_notifier(struct notifier_block *nb,
unsigned long event, void *dummy)
{
struct timespec tv;
switch (event) {
case PM_SUSPEND_PREPARE:
suspend_counter++;
suspend_time = ktime_get_real();
printk(KERN_INFO "suspend: start %d suspend...\n",
suspend_counter);
case PM_POST_SUSPEND:
tmp_time = ktime_sub(ktime_get_real(), suspend_time);
tv = ktime_to_timespec(tmp_time);
printk(KERN_INFO "suspend: finish %d suspend "
"after:%lu.%03lu seconds...\n",
suspend_counter,
(unsigned long) tv.tv_sec,
(unsigned long) tv.tv_nsec);
default:
break;
}
return 0;
}
static struct notifier_block suspend_counter_notifier_block = {
.notifier_call = suspend_counter_notifier,
};
static int __init suspend_counter_init(void)
{
return register_pm_notifier(&suspend_counter_notifier_block);
}
device_initcall(suspend_counter_init);
|
