1 files changed, 126 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/pm-s3c2412.c b/arch/arm/mach-s3c/pm-s3c2412.c
new file mode 100644
index 000000000..ed3b4cfc7
--- /dev/null
+++ b/arch/arm/mach-s3c/pm-s3c2412.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2006 Simtec Electronics
+//	Ben Dooks <ben@simtec.co.uk>
+//
+// http://armlinux.simtec.co.uk/.
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+#include <asm/irq.h>
+
+#include "irqs.h"
+#include "regs-gpio.h"
+
+#include "cpu.h"
+#include "pm.h"
+#include "wakeup-mask.h"
+
+#include "regs-dsc-s3c24xx.h"
+#include "s3c2412-power.h"
+
+extern void s3c2412_sleep_enter(void);
+
+static int s3c2412_cpu_suspend(unsigned long arg)
+{
+	unsigned long tmp;
+
+	/* set our standby method to sleep */
+
+	tmp = __raw_readl(S3C2412_PWRCFG);
+	tmp |= S3C2412_PWRCFG_STANDBYWFI_SLEEP;
+	__raw_writel(tmp, S3C2412_PWRCFG);
+
+	s3c2412_sleep_enter();
+
+	pr_info("Failed to suspend the system\n");
+	return 1; /* Aborting suspend */
+}
+
+/* mapping of interrupts to parts of the wakeup mask */
+static const struct samsung_wakeup_mask wake_irqs[] = {
+	{ .irq = IRQ_RTC,	.bit = S3C2412_PWRCFG_RTC_MASKIRQ, },
+};
+
+static void s3c2412_pm_prepare(void)
+{
+	samsung_sync_wakemask(S3C2412_PWRCFG,
+			      wake_irqs, ARRAY_SIZE(wake_irqs));
+}
+
+static int s3c2412_pm_add(struct device *dev, struct subsys_interface *sif)
+{
+	pm_cpu_prep = s3c2412_pm_prepare;
+	pm_cpu_sleep = s3c2412_cpu_suspend;
+
+	return 0;
+}
+
+static struct sleep_save s3c2412_sleep[] = {
+	SAVE_ITEM(S3C2412_DSC0),
+	SAVE_ITEM(S3C2412_DSC1),
+	SAVE_ITEM(S3C2413_GPJDAT),
+	SAVE_ITEM(S3C2413_GPJCON),
+	SAVE_ITEM(S3C2413_GPJUP),
+
+	/* save the PWRCFG to get back to original sleep method */
+
+	SAVE_ITEM(S3C2412_PWRCFG),
+
+	/* save the sleep configuration anyway, just in case these
+	 * get damaged during wakeup */
+
+	SAVE_ITEM(S3C2412_GPBSLPCON),
+	SAVE_ITEM(S3C2412_GPCSLPCON),
+	SAVE_ITEM(S3C2412_GPDSLPCON),
+	SAVE_ITEM(S3C2412_GPFSLPCON),
+	SAVE_ITEM(S3C2412_GPGSLPCON),
+	SAVE_ITEM(S3C2412_GPHSLPCON),
+	SAVE_ITEM(S3C2413_GPJSLPCON),
+};
+
+static struct subsys_interface s3c2412_pm_interface = {
+	.name		= "s3c2412_pm",
+	.subsys		= &s3c2412_subsys,
+	.add_dev	= s3c2412_pm_add,
+};
+
+static __init int s3c2412_pm_init(void)
+{
+	return subsys_interface_register(&s3c2412_pm_interface);
+}
+
+arch_initcall(s3c2412_pm_init);
+
+static int s3c2412_pm_suspend(void)
+{
+	s3c_pm_do_save(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+	return 0;
+}
+
+static void s3c2412_pm_resume(void)
+{
+	unsigned long tmp;
+
+	tmp = __raw_readl(S3C2412_PWRCFG);
+	tmp &= ~S3C2412_PWRCFG_STANDBYWFI_MASK;
+	tmp |=  S3C2412_PWRCFG_STANDBYWFI_IDLE;
+	__raw_writel(tmp, S3C2412_PWRCFG);
+
+	s3c_pm_do_restore(s3c2412_sleep, ARRAY_SIZE(s3c2412_sleep));
+}
+
+struct syscore_ops s3c2412_pm_syscore_ops = {
+	.suspend	= s3c2412_pm_suspend,
+	.resume		= s3c2412_pm_resume,
+};