ARM: S3C2416: Add Power Management support for SMDK2416 (6436b6a7) · Commits · 戴 / test

arch/arm/mach-s3c2410/include/mach/regs-s3c2443-clock.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -118,6 +118,8 @@
		#define S3C2443_SCLKCON_UARTCLK (1<<8)
		#define S3C2443_SCLKCON_USBHOST (1<<1)

		#define S3C2443_PWRCFG_SLEEP (1<<15)

		#include <asm/div64.h>

		static inline unsigned int

arch/arm/mach-s3c2416/Kconfig

+6 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,11 @@ config S3C2416_DMA
		help
		Internal config node for S3C2416 DMA support

		config S3C2416_PM
		bool
		help
		Internal config node to apply S3C2416 power management

		menu "S3C2416 Machines"

		config MACH_SMDK2416
		@@ -33,6 +38,7 @@ config MACH_SMDK2416
		select S3C_DEV_FB
		select S3C_DEV_HSMMC
		select S3C_DEV_HSMMC1
		select S3C2416_PM if PM
		help
		Say Y here if you are using an SMDK2416

arch/arm/mach-s3c2416/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -11,7 +11,7 @@ obj- :=

		obj-$(CONFIG_CPU_S3C2416) += s3c2416.o clock.o
		obj-$(CONFIG_CPU_S3C2416) += irq.o

		obj-$(CONFIG_S3C2416_PM) += pm.o
		#obj-$(CONFIG_S3C2416_DMA) += dma.o

		# Machine support

arch/arm/mach-s3c2416/irq.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -243,6 +243,8 @@ static int __init s3c2416_irq_add(struct sys_device *sysdev)

		static struct sysdev_driver s3c2416_irq_driver = {
		.add = s3c2416_irq_add,
		.suspend = s3c24xx_irq_suspend,
		.resume = s3c24xx_irq_resume,
		};

		static int __init s3c2416_irq_init(void)

arch/arm/mach-s3c2416/pm.c

0 → 100644

+84 −0

Original line number	Diff line number	Diff line
		/* 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/sysdev.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 void s3c2416_cpu_suspend(void)
		{
		flush_cache_all();

		/* 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();
		}

		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 sys_device *sysdev)
		{
		pm_cpu_prep = s3c2416_pm_prepare;
		pm_cpu_sleep = s3c2416_cpu_suspend;

		return 0;
		}

		static int s3c2416_pm_suspend(struct sys_device *dev, pm_message_t state)
		{
		return 0;
		}

		static int s3c2416_pm_resume(struct sys_device *dev)
		{
		/* unset the return-from-sleep amd inform flags */
		__raw_writel(0x0, S3C2443_PWRMODE);
		__raw_writel(0x0, S3C2412_INFORM0);
		__raw_writel(0x0, S3C2412_INFORM1);

		return 0;
		}

		static struct sysdev_driver s3c2416_pm_driver = {
		.add = s3c2416_pm_add,
		.suspend = s3c2416_pm_suspend,
		.resume = s3c2416_pm_resume,
		};

		static __init int s3c2416_pm_init(void)
		{
		return sysdev_driver_register(&s3c2416_sysclass, &s3c2416_pm_driver);
		}

		arch_initcall(s3c2416_pm_init);

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