1 /* linux/arch/arm/mach-s3c2412/pm.c
3 * Copyright (c) 2006 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
6 * http://armlinux.simtec.co.uk/.
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.
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/syscore_ops.h>
21 #include <linux/platform_device.h>
24 #include <mach/hardware.h>
25 #include <asm/cacheflush.h>
28 #include <mach/regs-power.h>
29 #include <mach/regs-gpioj.h>
30 #include <mach/regs-gpio.h>
31 #include <mach/regs-dsc.h>
36 #include <plat/s3c2412.h>
38 extern void s3c2412_sleep_enter(void);
40 static void s3c2412_cpu_suspend(void)
46 /* set our standby method to sleep */
48 tmp
= __raw_readl(S3C2412_PWRCFG
);
49 tmp
|= S3C2412_PWRCFG_STANDBYWFI_SLEEP
;
50 __raw_writel(tmp
, S3C2412_PWRCFG
);
52 s3c2412_sleep_enter();
55 static void s3c2412_pm_prepare(void)
59 static int s3c2412_pm_add(struct sys_device
*sysdev
)
61 pm_cpu_prep
= s3c2412_pm_prepare
;
62 pm_cpu_sleep
= s3c2412_cpu_suspend
;
67 static struct sleep_save s3c2412_sleep
[] = {
68 SAVE_ITEM(S3C2412_DSC0
),
69 SAVE_ITEM(S3C2412_DSC1
),
70 SAVE_ITEM(S3C2413_GPJDAT
),
71 SAVE_ITEM(S3C2413_GPJCON
),
72 SAVE_ITEM(S3C2413_GPJUP
),
74 /* save the PWRCFG to get back to original sleep method */
76 SAVE_ITEM(S3C2412_PWRCFG
),
78 /* save the sleep configuration anyway, just in case these
79 * get damaged during wakeup */
81 SAVE_ITEM(S3C2412_GPBSLPCON
),
82 SAVE_ITEM(S3C2412_GPCSLPCON
),
83 SAVE_ITEM(S3C2412_GPDSLPCON
),
84 SAVE_ITEM(S3C2412_GPFSLPCON
),
85 SAVE_ITEM(S3C2412_GPGSLPCON
),
86 SAVE_ITEM(S3C2412_GPHSLPCON
),
87 SAVE_ITEM(S3C2413_GPJSLPCON
),
90 static struct sysdev_driver s3c2412_pm_driver
= {
91 .add
= s3c2412_pm_add
,
94 static __init
int s3c2412_pm_init(void)
96 return sysdev_driver_register(&s3c2412_sysclass
, &s3c2412_pm_driver
);
99 arch_initcall(s3c2412_pm_init
);
101 static int s3c2412_pm_suspend(void)
103 s3c_pm_do_save(s3c2412_sleep
, ARRAY_SIZE(s3c2412_sleep
));
107 static void s3c2412_pm_resume(void)
111 tmp
= __raw_readl(S3C2412_PWRCFG
);
112 tmp
&= ~S3C2412_PWRCFG_STANDBYWFI_MASK
;
113 tmp
|= S3C2412_PWRCFG_STANDBYWFI_IDLE
;
114 __raw_writel(tmp
, S3C2412_PWRCFG
);
116 s3c_pm_do_restore(s3c2412_sleep
, ARRAY_SIZE(s3c2412_sleep
));
119 struct syscore_ops s3c2412_pm_syscore_ops
= {
120 .suspend
= s3c2412_pm_suspend
,
121 .resume
= s3c2412_pm_resume
,