Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / arch / arm / mach-s3c24xx / pm-s3c2416.c
blob44923895f558633251adc07ce589cfbcb8d86480
1 /* linux/arch/arm/mach-s3c2416/pm.c
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
6 * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
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/device.h>
14 #include <linux/syscore_ops.h>
15 #include <linux/io.h>
17 #include <asm/cacheflush.h>
19 #include <mach/regs-s3c2443-clock.h>
21 #include <plat/cpu.h>
22 #include <plat/pm.h>
24 #include "s3c2412-power.h"
26 extern void s3c2412_sleep_enter(void);
28 static int s3c2416_cpu_suspend(unsigned long arg)
30 /* enable wakeup sources regardless of battery state */
31 __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
33 /* set the mode as sleep, 2BED represents "Go to BED" */
34 __raw_writel(0x2BED, S3C2443_PWRMODE);
36 s3c2412_sleep_enter();
38 pr_info("Failed to suspend the system\n");
39 return 1; /* Aborting suspend */
42 static void s3c2416_pm_prepare(void)
45 * write the magic value u-boot uses to check for resume into
46 * the INFORM0 register, and ensure INFORM1 is set to the
47 * correct address to resume from.
49 __raw_writel(0x2BED, S3C2412_INFORM0);
50 __raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
53 static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif)
55 pm_cpu_prep = s3c2416_pm_prepare;
56 pm_cpu_sleep = s3c2416_cpu_suspend;
58 return 0;
61 static struct subsys_interface s3c2416_pm_interface = {
62 .name = "s3c2416_pm",
63 .subsys = &s3c2416_subsys,
64 .add_dev = s3c2416_pm_add,
67 static __init int s3c2416_pm_init(void)
69 return subsys_interface_register(&s3c2416_pm_interface);
72 arch_initcall(s3c2416_pm_init);
75 static void s3c2416_pm_resume(void)
77 /* unset the return-from-sleep amd inform flags */
78 __raw_writel(0x0, S3C2443_PWRMODE);
79 __raw_writel(0x0, S3C2412_INFORM0);
80 __raw_writel(0x0, S3C2412_INFORM1);
83 struct syscore_ops s3c2416_pm_syscore_ops = {
84 .resume = s3c2416_pm_resume,