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Commit 4b053e7a authored by Ben Dooks's avatar Ben Dooks Committed by Russell King
Browse files

[ARM] 3858/1: S3C2412: power management code 



Add S3C2412 power management code, and move the
core register saving in from s3c2412.c

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent da56c949

arch/arm/mach-s3c2410/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -176,6 +176,13 @@ config CPU_S3C2412_ONLY 
		   !CPU_S3C2440 && !CPU_S3C2442 && CPU_S3C2412

	default y if CPU_S3C2412



config S3C2412_PM

	bool

	default y if PM

	depends on CPU_S3C2412

	help

	  Internal config node to apply S3C2412 power management



config CPU_S3C2412

	bool

	depends on ARCH_S3C2410

arch/arm/mach-s3c2410/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -38,6 +38,8 @@ obj-$(CONFIG_CPU_S3C2412) += s3c2412-irq.o 
obj-$(CONFIG_CPU_S3C2412)	+= s3c2412-clock.o

obj-dma-$(CONFIG_CPU_S3C2412)	+= s3c2412-dma.o



obj-$(CONFIG_S3C2412_PM)	+= s3c2412-pm.o



#

# S3C244X support

arch/arm/mach-s3c2410/s3c2412-pm.c

0 → 100644
+128 −0
Original line number Diff line number Diff line 
/* linux/arch/arm/mach-s3c2410/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/sysdev.h>

#include <linux/platform_device.h>



#include <asm/hardware.h>

#include <asm/io.h>

#include <asm/irq.h>



#include <asm/arch/regs-power.h>

#include <asm/arch/regs-gpioj.h>

#include <asm/arch/regs-gpio.h>

#include <asm/arch/regs-dsc.h>



#include "cpu.h"

#include "pm.h"



#include "s3c2412.h"



static void s3c2412_cpu_suspend(void)

{

	unsigned long tmp;



	/* set our standby method to sleep */



	tmp = __raw_readl(S3C2412_PWRCFG);

	tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;

	__raw_writel(tmp, S3C2412_PWRCFG);



	/* issue the standby signal into the pm unit. Note, we

	 * issue a write-buffer drain just in case */



	tmp = 0;



	asm("b 1f\n\t"

	    ".align 5\n\t"

	    "1:\n\t"

	    "mcr p15, 0, %0, c7, c10, 4\n\t"

	    "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));



	/* we should never get past here */



	panic("sleep resumed to originator?");

}



static void s3c2412_pm_prepare(void)

{

}



static int s3c2412_pm_add(struct sys_device *sysdev)

{

	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_GPESLPCON),

	SAVE_ITEM(S3C2412_GPFSLPCON),

	SAVE_ITEM(S3C2412_GPGSLPCON),

	SAVE_ITEM(S3C2412_GPHSLPCON),

	SAVE_ITEM(S3C2413_GPJSLPCON),

};



static int s3c2412_pm_suspend(struct sys_device *dev, pm_message_t state)

{

	s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));

	return 0;

}



static int s3c2412_pm_resume(struct sys_device *dev)

{

	unsigned long tmp;



	tmp = __raw_readl(S3C2412_PWRCFG);

	tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;

	tmp |=  S3C2412_PWRCFG_STANDBYWFI_IDLE;

	__raw_writel(tmp, S3C2412_PWRCFG);



	s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));

	return 0;

}



static struct sysdev_driver s3c2412_pm_driver = {

	.add		= s3c2412_pm_add,

	.suspend	= s3c2412_pm_suspend,

	.resume		= s3c2412_pm_resume,

};



static __init int s3c2412_pm_init(void)

{

	return sysdev_driver_register(&s3c2412_sysclass, &s3c2412_pm_driver);

}



arch_initcall(s3c2412_pm_init);

arch/arm/mach-s3c2410/s3c2412.c

+0 −40
Original line number Diff line number Diff line
@@ -158,48 +158,8 @@ void __init s3c2412_init_clocks(int xtal) 
 * as a driver which may support both 2410 and 2440 may try and use it.

*/



#ifdef CONFIG_PM

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 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_GPESLPCON),

	SAVE_ITEM(S3C2412_GPFSLPCON),

	SAVE_ITEM(S3C2412_GPGSLPCON),

	SAVE_ITEM(S3C2412_GPHSLPCON),

	SAVE_ITEM(S3C2413_GPJSLPCON),

};



static int s3c2412_suspend(struct sys_device *dev, pm_message_t state)

{

	s3c2410_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));

	return 0;

}



static int s3c2412_resume(struct sys_device *dev)

{

	s3c2410_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));

	return 0;

}



#else

#define s3c2412_suspend NULL

#define s3c2412_resume  NULL

#endif



struct sysdev_class s3c2412_sysclass = {

	set_kset_name("s3c2412-core"),

	.suspend	= s3c2412_suspend,

	.resume		= s3c2412_resume

};



static int __init s3c2412_core_init(void)