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126 lines
2.8 KiB
126 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Copyright (c) 2006 Simtec Electronics |
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// Ben Dooks <[email protected]> |
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// |
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// http://armlinux.simtec.co.uk/. |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/interrupt.h> |
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#include <linux/list.h> |
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#include <linux/timer.h> |
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#include <linux/init.h> |
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#include <linux/device.h> |
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#include <linux/syscore_ops.h> |
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#include <linux/platform_device.h> |
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#include <linux/io.h> |
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#include <asm/cacheflush.h> |
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#include <asm/irq.h> |
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#include "irqs.h" |
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#include "regs-gpio.h" |
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#include "cpu.h" |
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#include "pm.h" |
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#include "wakeup-mask.h" |
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#include "regs-dsc-s3c24xx.h" |
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#include "s3c2412-power.h" |
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extern void s3c2412_sleep_enter(void); |
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static int s3c2412_cpu_suspend(unsigned long arg) |
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{ |
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unsigned long tmp; |
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/* set our standby method to sleep */ |
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tmp = __raw_readl(S3C2412_PWRCFG); |
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tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP; |
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__raw_writel(tmp, S3C2412_PWRCFG); |
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s3c2412_sleep_enter(); |
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pr_info("Failed to suspend the system\n"); |
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return 1; /* Aborting suspend */ |
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} |
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/* mapping of interrupts to parts of the wakeup mask */ |
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static const struct samsung_wakeup_mask wake_irqs[] = { |
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{ .irq = IRQ_RTC, .bit = S3C2412_PWRCFG_RTC_MASKIRQ, }, |
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}; |
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static void s3c2412_pm_prepare(void) |
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{ |
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samsung_sync_wakemask(S3C2412_PWRCFG, |
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wake_irqs, ARRAY_SIZE(wake_irqs)); |
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} |
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static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif) |
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{ |
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pm_cpu_prep = s3c2412_pm_prepare; |
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pm_cpu_sleep = s3c2412_cpu_suspend; |
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return 0; |
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} |
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static struct sleep_save s3c2412_sleep[] = { |
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SAVE_ITEM(S3C2412_DSC0), |
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SAVE_ITEM(S3C2412_DSC1), |
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SAVE_ITEM(S3C2413_GPJDAT), |
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SAVE_ITEM(S3C2413_GPJCON), |
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SAVE_ITEM(S3C2413_GPJUP), |
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/* save the PWRCFG to get back to original sleep method */ |
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SAVE_ITEM(S3C2412_PWRCFG), |
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/* save the sleep configuration anyway, just in case these |
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* get damaged during wakeup */ |
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SAVE_ITEM(S3C2412_GPBSLPCON), |
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SAVE_ITEM(S3C2412_GPCSLPCON), |
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SAVE_ITEM(S3C2412_GPDSLPCON), |
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SAVE_ITEM(S3C2412_GPFSLPCON), |
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SAVE_ITEM(S3C2412_GPGSLPCON), |
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SAVE_ITEM(S3C2412_GPHSLPCON), |
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SAVE_ITEM(S3C2413_GPJSLPCON), |
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}; |
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static struct subsys_interface s3c2412_pm_interface = { |
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.name = "s3c2412_pm", |
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.subsys = &s3c2412_subsys, |
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.add_dev = s3c2412_pm_add, |
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}; |
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static __init int s3c2412_pm_init(void) |
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{ |
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return subsys_interface_register(&s3c2412_pm_interface); |
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} |
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arch_initcall(s3c2412_pm_init); |
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static int s3c2412_pm_suspend(void) |
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{ |
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s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
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return 0; |
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} |
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static void s3c2412_pm_resume(void) |
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{ |
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unsigned long tmp; |
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tmp = __raw_readl(S3C2412_PWRCFG); |
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tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK; |
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tmp |= S3C2412_PWRCFG_STANDBYWFI_IDLE; |
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__raw_writel(tmp, S3C2412_PWRCFG); |
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s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep)); |
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} |
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struct syscore_ops s3c2412_pm_syscore_ops = { |
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.suspend = s3c2412_pm_suspend, |
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.resume = s3c2412_pm_resume, |
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};
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