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https://github.com/openwrt/openwrt.git
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73 lines
2.1 KiB
Diff
73 lines
2.1 KiB
Diff
diff --git a/arch/arm/plat-s3c/pm.c b/arch/arm/plat-s3c/pm.c
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index 8d97db2..a7667d5 100644
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--- a/arch/arm/plat-s3c/pm.c
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+++ b/arch/arm/plat-s3c/pm.c
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@@ -301,11 +301,14 @@ static int s3c_pm_enter(suspend_state_t state)
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s3c_pm_arch_stop_clocks();
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- /* s3c_cpu_save will also act as our return point from when
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- * we resume as it saves its own register state and restores it
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- * during the resume. */
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+ /* s3c2410_cpu_save will also act as our return point from when
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+ * we resume as it saves its own register state, so use the return
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+ * code to differentiate return from save and return from sleep */
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- s3c_cpu_save(regs_save);
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+ if (s3c_cpu_save(regs_save) == 0) {
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+ flush_cache_all();
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+ pm_cpu_sleep();
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+ }
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/* restore the cpu state using the kernel's cpu init code. */
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diff --git a/arch/arm/plat-s3c24xx/irq-pm.c b/arch/arm/plat-s3c24xx/irq-pm.c
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index b7acf1a..925514e 100644
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--- a/arch/arm/plat-s3c24xx/irq-pm.c
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+++ b/arch/arm/plat-s3c24xx/irq-pm.c
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@@ -15,6 +15,7 @@
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/sysdev.h>
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+#include <linux/irq.h>
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#include <plat/cpu.h>
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#include <plat/pm.h>
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@@ -80,7 +81,9 @@ int s3c24xx_irq_suspend(struct sys_device *dev, pm_message_t state)
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int s3c24xx_irq_resume(struct sys_device *dev)
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{
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- unsigned int i;
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+ unsigned int i, irq;
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+ unsigned long eintpnd;
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+ struct irq_desc *desc;
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for (i = 0; i < ARRAY_SIZE(save_extint); i++)
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__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
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@@ -91,5 +94,25 @@ int s3c24xx_irq_resume(struct sys_device *dev)
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s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
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__raw_writel(save_eintmask, S3C24XX_EINTMASK);
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+ /*
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+ * ACK those interrupts which are now masked and pending.
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+ * Level interrupts if not ACKed here, create an interrupt storm
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+ * because they are not handled at all.
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+ */
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+
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+ eintpnd = __raw_readl(S3C24XX_EINTPEND);
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+
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+ eintpnd &= save_eintmask;
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+ eintpnd &= ~0xff; /* ignore lower irqs */
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+
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+ while (eintpnd) {
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+ irq = __ffs(eintpnd);
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+ eintpnd &= ~(1 << irq);
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+
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+ irq += (IRQ_EINT4 - 4);
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+ desc = irq_to_desc(irq);
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+ desc->chip->ack(irq);
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+ }
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+
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return 0;
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}
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