124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/* 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 <mach/hardware.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/irq.h>
|
|
|
|
#include <mach/regs-power.h>
|
|
#include <mach/regs-gpio.h>
|
|
#include <mach/regs-dsc.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/pm.h>
|
|
|
|
#include <plat/s3c2412.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();
|
|
|
|
panic("sleep resumed to originator?");
|
|
}
|
|
|
|
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,
|
|
};
|