1 files changed, 81 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/pm-s3c2416.c b/arch/arm/mach-s3c/pm-s3c2416.c
new file mode 100644
index 000000000000..f69ad84cf4ff
--- /dev/null
+++ b/arch/arm/mach-s3c/pm-s3c2416.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2010 Samsung Electronics Co., Ltd.
+//		http://www.samsung.com
+//
+// S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
+
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+
+#include "regs-s3c2443-clock.h"
+
+#include "cpu.h"
+#include "pm.h"
+
+#include "s3c2412-power.h"
+
+#ifdef CONFIG_PM_SLEEP
+extern void s3c2412_sleep_enter(void);
+
+static int s3c2416_cpu_suspend(unsigned long arg)
+{
+	/* enable wakeup sources regardless of battery state */
+	__raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG);
+
+	/* set the mode as sleep, 2BED represents "Go to BED" */
+	__raw_writel(0x2BED, S3C2443_PWRMODE);
+
+	s3c2412_sleep_enter();
+
+	pr_info("Failed to suspend the system\n");
+	return 1; /* Aborting suspend */
+}
+
+static void s3c2416_pm_prepare(void)
+{
+	/*
+	 * write the magic value u-boot uses to check for resume into
+	 * the INFORM0 register, and ensure INFORM1 is set to the
+	 * correct address to resume from.
+	 */
+	__raw_writel(0x2BED, S3C2412_INFORM0);
+	__raw_writel(__pa_symbol(s3c_cpu_resume), S3C2412_INFORM1);
+}
+
+static int s3c2416_pm_add(struct device *dev, struct subsys_interface *sif)
+{
+	pm_cpu_prep = s3c2416_pm_prepare;
+	pm_cpu_sleep = s3c2416_cpu_suspend;
+
+	return 0;
+}
+
+static struct subsys_interface s3c2416_pm_interface = {
+	.name		= "s3c2416_pm",
+	.subsys		= &s3c2416_subsys,
+	.add_dev	= s3c2416_pm_add,
+};
+
+static __init int s3c2416_pm_init(void)
+{
+	return subsys_interface_register(&s3c2416_pm_interface);
+}
+
+arch_initcall(s3c2416_pm_init);
+#endif
+
+static void s3c2416_pm_resume(void)
+{
+	/* unset the return-from-sleep amd inform flags */
+	__raw_writel(0x0, S3C2443_PWRMODE);
+	__raw_writel(0x0, S3C2412_INFORM0);
+	__raw_writel(0x0, S3C2412_INFORM1);
+}
+
+struct syscore_ops s3c2416_pm_syscore_ops = {
+	.resume		= s3c2416_pm_resume,
+};