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
120
121
122
123
124
|
/* linux/arch/arm/mach-s3c2412/pm.c
*
* Copyright (c) 2006 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* http://armlinux.simtec.co.uk/.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/syscore_ops.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <mach/regs-gpio.h>
#include <plat/cpu.h>
#include <plat/pm.h>
#include <plat/s3c2412.h>
#include "regs-dsc.h"
#include "s3c2412-power.h"
extern void s3c2412_sleep_enter(void);
static int s3c2412_cpu_suspend(unsigned long arg)
{
unsigned long tmp;
/* set our standby method to sleep */
tmp = __raw_readl(S3C2412_PWRCFG);
tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
__raw_writel(tmp, S3C2412_PWRCFG);
s3c2412_sleep_enter();
pr_info("Failed to suspend the system\n");
return 1; /* Aborting suspend */
}
static void s3c2412_pm_prepare(void)
{
}
static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif)
{
pm_cpu_prep = s3c2412_pm_prepare;
pm_cpu_sleep = s3c2412_cpu_suspend;
return 0;
}
static struct sleep_save s3c2412_sleep[] = {
SAVE_ITEM(S3C2412_DSC0),
SAVE_ITEM(S3C2412_DSC1),
SAVE_ITEM(S3C2413_GPJDAT),
SAVE_ITEM(S3C2413_GPJCON),
SAVE_ITEM(S3C2413_GPJUP),
/* save the PWRCFG to get back to original sleep method */
SAVE_ITEM(S3C2412_PWRCFG),
/* save the sleep configuration anyway, just in case these
* get damaged during wakeup */
SAVE_ITEM(S3C2412_GPBSLPCON),
SAVE_ITEM(S3C2412_GPCSLPCON),
SAVE_ITEM(S3C2412_GPDSLPCON),
SAVE_ITEM(S3C2412_GPFSLPCON),
SAVE_ITEM(S3C2412_GPGSLPCON),
SAVE_ITEM(S3C2412_GPHSLPCON),
SAVE_ITEM(S3C2413_GPJSLPCON),
};
static struct subsys_interface s3c2412_pm_interface = {
.name = "s3c2412_pm",
.subsys = &s3c2412_subsys,
.add_dev = s3c2412_pm_add,
};
static __init int s3c2412_pm_init(void)
{
return subsys_interface_register(&s3c2412_pm_interface);
}
arch_initcall(s3c2412_pm_init);
static int s3c2412_pm_suspend(void)
{
s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
return 0;
}
static void s3c2412_pm_resume(void)
{
unsigned long tmp;
tmp = __raw_readl(S3C2412_PWRCFG);
tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE;
__raw_writel(tmp, S3C2412_PWRCFG);
s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
}
struct syscore_ops s3c2412_pm_syscore_ops = {
.suspend = s3c2412_pm_suspend,
.resume = s3c2412_pm_resume,
};
|
