Merge branch 'gart/rename' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...
[linux-2.6.git] / arch / arm / mach-s3c2412 / pm.c
1 /* linux/arch/arm/mach-s3c2412/pm.c
2  *
3  * Copyright (c) 2006 Simtec Electronics
4  *      Ben Dooks <ben@simtec.co.uk>
5  *
6  * http://armlinux.simtec.co.uk/.
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/list.h>
17 #include <linux/timer.h>
18 #include <linux/init.h>
19 #include <linux/sysdev.h>
20 #include <linux/platform_device.h>
21 #include <linux/io.h>
22
23 #include <mach/hardware.h>
24 #include <asm/cacheflush.h>
25 #include <asm/irq.h>
26
27 #include <mach/regs-power.h>
28 #include <mach/regs-gpioj.h>
29 #include <mach/regs-gpio.h>
30 #include <mach/regs-dsc.h>
31
32 #include <plat/cpu.h>
33 #include <plat/pm.h>
34
35 #include <plat/s3c2412.h>
36
37 extern void s3c2412_sleep_enter(void);
38
39 static void s3c2412_cpu_suspend(void)
40 {
41         unsigned long tmp;
42
43         flush_cache_all();
44
45         /* set our standby method to sleep */
46
47         tmp = __raw_readl(S3C2412_PWRCFG);
48         tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
49         __raw_writel(tmp, S3C2412_PWRCFG);
50
51         s3c2412_sleep_enter();
52 }
53
54 static void s3c2412_pm_prepare(void)
55 {
56 }
57
58 static int s3c2412_pm_add(struct sys_device *sysdev)
59 {
60         pm_cpu_prep = s3c2412_pm_prepare;
61         pm_cpu_sleep = s3c2412_cpu_suspend;
62
63         return 0;
64 }
65
66 static struct sleep_save s3c2412_sleep[] = {
67         SAVE_ITEM(S3C2412_DSC0),
68         SAVE_ITEM(S3C2412_DSC1),
69         SAVE_ITEM(S3C2413_GPJDAT),
70         SAVE_ITEM(S3C2413_GPJCON),
71         SAVE_ITEM(S3C2413_GPJUP),
72
73         /* save the PWRCFG to get back to original sleep method */
74
75         SAVE_ITEM(S3C2412_PWRCFG),
76
77         /* save the sleep configuration anyway, just in case these
78          * get damaged during wakeup */
79
80         SAVE_ITEM(S3C2412_GPBSLPCON),
81         SAVE_ITEM(S3C2412_GPCSLPCON),
82         SAVE_ITEM(S3C2412_GPDSLPCON),
83         SAVE_ITEM(S3C2412_GPFSLPCON),
84         SAVE_ITEM(S3C2412_GPGSLPCON),
85         SAVE_ITEM(S3C2412_GPHSLPCON),
86         SAVE_ITEM(S3C2413_GPJSLPCON),
87 };
88
89 static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)
90 {
91         s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
92         return 0;
93 }
94
95 static int s3c2412_pm_resume(struct sys_device *dev)
96 {
97         unsigned long tmp;
98
99         tmp = __raw_readl(S3C2412_PWRCFG);
100         tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
101         tmp |=  S3C2412_PWRCFG_STANDBYWFI_IDLE;
102         __raw_writel(tmp, S3C2412_PWRCFG);
103
104         s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
105         return 0;
106 }
107
108 static struct sysdev_driver s3c2412_pm_driver = {
109         .add            = s3c2412_pm_add,
110         .suspend        = s3c2412_pm_suspend,
111         .resume         = s3c2412_pm_resume,
112 };
113
114 static __init int s3c2412_pm_init(void)
115 {
116         return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_pm_driver);
117 }
118
119 arch_initcall(s3c2412_pm_init);