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c78a41fc04
As a final bit of preparation for converting to ARCH_MULTIPLATFORM, change the interrupt handling for s3c24xx to use sparse IRQs. Since the number of possible interrupts is already fixed and relatively small per chip, just make it use all legacy interrupts preallocated using the .nr_irqs field in the machine descriptor, rather than actually allocating domains on the fly. Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
// 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 <ben@simtec.co.uk>
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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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