/* 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/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 <asm/plat-s3c24xx/cpu.h> #include <asm/plat-s3c24xx/pm.h> #include <asm/plat-s3c24xx/s3c2412.h> extern void s3c2412_sleep_enter(void); 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); s3c2412_sleep_enter(); } 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_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);