mirror of https://gitee.com/openkylin/linux.git
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* linux/arch/arm/mach-s3c2416/pm.c
|
|
*
|
|
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
|
|
*
|
|
* 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/device.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
#include <mach/regs-power.h>
|
|
#include <mach/regs-s3c2443-clock.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/pm.h>
|
|
|
|
extern void s3c2412_sleep_enter(void);
|
|
|
|
static int s3c2416_cpu_suspend(unsigned long arg)
|
|
{
|
|
/* enable wakeup sources regardless of battery state */
|
|
__raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
|
|
|
|
/* set the mode as sleep, 2BED represents "Go to BED" */
|
|
__raw_writel(0x2BED, S3C2443_PWRMODE);
|
|
|
|
s3c2412_sleep_enter();
|
|
|
|
panic("sleep resumed to originator?");
|
|
}
|
|
|
|
static void s3c2416_pm_prepare(void)
|
|
{
|
|
/*
|
|
* write the magic value u-boot uses to check for resume into
|
|
* the INFORM0 register, and ensure INFORM1 is set to the
|
|
* correct address to resume from.
|
|
*/
|
|
__raw_writel(0x2BED, S3C2412_INFORM0);
|
|
__raw_writel(virt_to_phys(s3c_cpu_resume), S3C2412_INFORM1);
|
|
}
|
|
|
|
static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif)
|
|
{
|
|
pm_cpu_prep = s3c2416_pm_prepare;
|
|
pm_cpu_sleep = s3c2416_cpu_suspend;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct subsys_interface s3c2416_pm_interface = {
|
|
.name = "s3c2416_pm",
|
|
.subsys = &s3c2416_subsys,
|
|
.add_dev = s3c2416_pm_add,
|
|
};
|
|
|
|
static __init int s3c2416_pm_init(void)
|
|
{
|
|
return subsys_interface_register(&s3c2416_pm_interface);
|
|
}
|
|
|
|
arch_initcall(s3c2416_pm_init);
|
|
|
|
|
|
static void s3c2416_pm_resume(void)
|
|
{
|
|
/* unset the return-from-sleep amd inform flags */
|
|
__raw_writel(0x0, S3C2443_PWRMODE);
|
|
__raw_writel(0x0, S3C2412_INFORM0);
|
|
__raw_writel(0x0, S3C2412_INFORM1);
|
|
}
|
|
|
|
struct syscore_ops s3c2416_pm_syscore_ops = {
|
|
.resume = s3c2416_pm_resume,
|
|
};
|