From b4288794f1b5abcf4ed2761dffff1f5787560253 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben-linux@fluff.org>
Date: Wed, 1 Jun 2011 10:44:50 +0100
Subject: [PATCH] --- yaml --- r: 260608 b: refs/heads/master c:
 1bac282af43d81d826ef25945a35536fa9bd041d h: refs/heads/master v: v3

---
 [refs]                                          |  2 +-
 .../arm/mach-s3c2410/include/mach/pm-core.h     |  3 +++
 .../arm/mach-s3c64xx/include/mach/pm-core.h     | 17 +++++++++++++++++
 .../arm/mach-s5pv210/include/mach/pm-core.h     |  3 +++
 trunk/arch/arm/plat-samsung/pm.c                |  2 ++
 5 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index b93c9272c42c..9a8a4cbcc8e3 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c17afc0aa69615b4c2250b6476431c4d601890a0
+refs/heads/master: 1bac282af43d81d826ef25945a35536fa9bd041d
diff --git a/trunk/arch/arm/mach-s3c2410/include/mach/pm-core.h b/trunk/arch/arm/mach-s3c2410/include/mach/pm-core.h
index 70a83b209e25..45eea5210c87 100644
--- a/trunk/arch/arm/mach-s3c2410/include/mach/pm-core.h
+++ b/trunk/arch/arm/mach-s3c2410/include/mach/pm-core.h
@@ -62,3 +62,6 @@ static inline void s3c_pm_arch_update_uart(void __iomem *regs,
 					   struct pm_uart_save *save)
 {
 }
+
+static inline void s3c_pm_restored_gpios(void) { }
+static inline void s3c_pm_saved_gpios(void) { }
diff --git a/trunk/arch/arm/mach-s3c64xx/include/mach/pm-core.h b/trunk/arch/arm/mach-s3c64xx/include/mach/pm-core.h
index 4ed0f582d222..38659bebe4b1 100644
--- a/trunk/arch/arm/mach-s3c64xx/include/mach/pm-core.h
+++ b/trunk/arch/arm/mach-s3c64xx/include/mach/pm-core.h
@@ -96,3 +96,20 @@ static inline void s3c_pm_arch_update_uart(void __iomem *regs,
 		save->ucon = new_ucon;
 	}
 }
+
+static inline void s3c_pm_restored_gpios(void)
+{
+	/* ensure sleep mode has been cleared from the system */
+
+	__raw_writel(0, S3C64XX_SLPEN);
+}
+
+static inline void s3c_pm_saved_gpios(void)
+{
+	/* turn on the sleep mode and keep it there, as it seems that during
+	 * suspend the xCON registers get re-set and thus you can end up with
+	 * problems between going to sleep and resuming.
+	 */
+
+	__raw_writel(S3C64XX_SLPEN_USE_xSLP, S3C64XX_SLPEN);
+}
diff --git a/trunk/arch/arm/mach-s5pv210/include/mach/pm-core.h b/trunk/arch/arm/mach-s5pv210/include/mach/pm-core.h
index e8d394f8b057..3e22109e1b7b 100644
--- a/trunk/arch/arm/mach-s5pv210/include/mach/pm-core.h
+++ b/trunk/arch/arm/mach-s5pv210/include/mach/pm-core.h
@@ -41,3 +41,6 @@ static inline void s3c_pm_arch_update_uart(void __iomem *regs,
 {
 	/* nothing here yet */
 }
+
+static inline void s3c_pm_restored_gpios(void) { }
+static inline void s3c_pm_saved_gpios(void) { }
diff --git a/trunk/arch/arm/plat-samsung/pm.c b/trunk/arch/arm/plat-samsung/pm.c
index 5c0a440d6e16..4f9a9515beae 100644
--- a/trunk/arch/arm/plat-samsung/pm.c
+++ b/trunk/arch/arm/plat-samsung/pm.c
@@ -268,6 +268,7 @@ static int s3c_pm_enter(suspend_state_t state)
 	/* save all necessary core registers not covered by the drivers */
 
 	s3c_pm_save_gpios();
+	s3c_pm_saved_gpios();
 	s3c_pm_save_uarts();
 	s3c_pm_save_core();
 
@@ -309,6 +310,7 @@ static int s3c_pm_enter(suspend_state_t state)
 	s3c_pm_restore_core();
 	s3c_pm_restore_uarts();
 	s3c_pm_restore_gpios();
+	s3c_pm_restored_gpios();
 
 	s3c_pm_debug_init();