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arch/arm/mach-s3c2416/pm.c
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/* 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. */ |
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#include <linux/device.h> |
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#include <linux/syscore_ops.h> |
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#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); |
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static int s3c2416_cpu_suspend(unsigned long arg) |
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{ |
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/* 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(); |
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panic("sleep resumed to originator?"); |
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} 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); } |
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static int s3c2416_pm_add(struct device *dev) |
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{ pm_cpu_prep = s3c2416_pm_prepare; pm_cpu_sleep = s3c2416_cpu_suspend; return 0; } |
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static struct subsys_interface s3c2416_pm_interface = { .name = "s3c2416_pm", .subsys = &s3c2416_subsys, .add_dev = s3c2416_pm_add, |
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}; static __init int s3c2416_pm_init(void) |
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{ |
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return subsys_interface_register(&s3c2416_pm_interface); |
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} |
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arch_initcall(s3c2416_pm_init); static void s3c2416_pm_resume(void) |
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{ /* unset the return-from-sleep amd inform flags */ __raw_writel(0x0, S3C2443_PWRMODE); __raw_writel(0x0, S3C2412_INFORM0); __raw_writel(0x0, S3C2412_INFORM1); |
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} |
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struct syscore_ops s3c2416_pm_syscore_ops = { |
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.resume = s3c2416_pm_resume, }; |