1 files changed, 115 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/irq-pm.c b/arch/arm/mach-s3c24xx/irq-pm.c
new file mode 100644
index 000000000..e0131b16a
--- /dev/null
+++ b/arch/arm/mach-s3c24xx/irq-pm.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2003-2004 Simtec Electronics
+//	Ben Dooks <ben@simtec.co.uk>
+//	http://armlinux.simtec.co.uk/
+//
+// S3C24XX - IRQ PM code
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+
+#include <plat/cpu.h>
+#include <plat/pm.h>
+#include <plat/map-base.h>
+#include <plat/map-s3c.h>
+
+#include <mach/regs-irq.h>
+#include <mach/regs-gpio.h>
+#include <mach/pm-core.h>
+
+#include <asm/irq.h>
+
+int s3c_irq_wake(struct irq_data *data, unsigned int state)
+{
+	unsigned long irqbit = 1 << data->hwirq;
+
+	if (!(s3c_irqwake_intallow & irqbit))
+		return -ENOENT;
+
+	pr_info("wake %s for hwirq %lu\n",
+		state ? "enabled" : "disabled", data->hwirq);
+
+	if (!state)
+		s3c_irqwake_intmask |= irqbit;
+	else
+		s3c_irqwake_intmask &= ~irqbit;
+
+	return 0;
+}
+
+static struct sleep_save irq_save[] = {
+	SAVE_ITEM(S3C2410_INTMSK),
+	SAVE_ITEM(S3C2410_INTSUBMSK),
+};
+
+/* the extint values move between the s3c2410/s3c2440 and the s3c2412
+ * so we use an array to hold them, and to calculate the address of
+ * the register at run-time
+*/
+
+static unsigned long save_extint[3];
+static unsigned long save_eintflt[4];
+static unsigned long save_eintmask;
+
+static int s3c24xx_irq_suspend(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+		save_extint[i] = __raw_readl(S3C24XX_EXTINT0 + (i*4));
+
+	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+		save_eintflt[i] = __raw_readl(S3C24XX_EINFLT0 + (i*4));
+
+	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+	save_eintmask = __raw_readl(S3C24XX_EINTMASK);
+
+	return 0;
+}
+
+static void s3c24xx_irq_resume(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(save_extint); i++)
+		__raw_writel(save_extint[i], S3C24XX_EXTINT0 + (i*4));
+
+	for (i = 0; i < ARRAY_SIZE(save_eintflt); i++)
+		__raw_writel(save_eintflt[i], S3C24XX_EINFLT0 + (i*4));
+
+	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+	__raw_writel(save_eintmask, S3C24XX_EINTMASK);
+}
+
+struct syscore_ops s3c24xx_irq_syscore_ops = {
+	.suspend	= s3c24xx_irq_suspend,
+	.resume		= s3c24xx_irq_resume,
+};
+
+#ifdef CONFIG_CPU_S3C2416
+static struct sleep_save s3c2416_irq_save[] = {
+	SAVE_ITEM(S3C2416_INTMSK2),
+};
+
+static int s3c2416_irq_suspend(void)
+{
+	s3c_pm_do_save(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
+
+	return 0;
+}
+
+static void s3c2416_irq_resume(void)
+{
+	s3c_pm_do_restore(s3c2416_irq_save, ARRAY_SIZE(s3c2416_irq_save));
+}
+
+struct syscore_ops s3c2416_irq_syscore_ops = {
+	.suspend	= s3c2416_irq_suspend,
+	.resume		= s3c2416_irq_resume,
+};
+#endif