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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c')
-rw-r--r--kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c b/kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c
new file mode 100644
index 000000000..c0e328e37
--- /dev/null
+++ b/kernel/arch/arm/mach-s3c24xx/pm-s3c2416.c
@@ -0,0 +1,86 @@
+/* linux/arch/arm/mach-s3c2416/pm.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * S3C2416 - PM support (Based on Ben Dooks' S3C2412 PM support)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+
+#include <mach/regs-s3c2443-clock.h>
+
+#include <plat/cpu.h>
+#include <plat/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(virt_to_phys(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,
+};