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authorBen Dooks <ben-linux@fluff.org>2009-03-10 18:19:35 +0000
committerBen Dooks <ben-linux@fluff.org>2009-05-07 11:04:55 +0100
commitbd117bd161ea99826494983aef8c8e236ac129bd (patch)
tree76929c5f9eb611b7428a69375b2e6ddf09638821 /arch/arm/plat-s3c
parent4b637dc231a96a151ea70c27d86b35c7891e2a7c (diff)
[ARM] S3C64XX: Initial support for PM (suspend to RAM)
Add the initial support for the S3C64XX based systems to use suspend-to-RAM to sleep. Includes basic debugging for use with the SMDK6410 usign the LEDs on the baseboard. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c')
-rw-r--r--arch/arm/plat-s3c/Kconfig9
-rw-r--r--arch/arm/plat-s3c/include/plat/pm.h12
-rw-r--r--arch/arm/plat-s3c/pm.c6
3 files changed, 25 insertions, 2 deletions
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 042d34a6f81..a4c5027421d 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -71,6 +71,15 @@ config S3C2410_PM_DEBUG
Resume code. See <file:Documentation/arm/Samsung-S3C24XX/Suspend.txt>
for more information.
+config S3C_PM_DEBUG_LED_SMDK
+ bool "SMDK LED suspend/resume debugging"
+ depends on PM && (MACH_SMDK6410)
+ help
+ Say Y here to enable the use of the SMDK LEDs on the baseboard
+ for debugging of the state of the suspend and resume process.
+
+ Note, this currently only works for S3C64XX based SMDK boards.
+
config S3C2410_PM_CHECK
bool "S3C2410 PM Suspend Memory CRC"
depends on PM && CRC32
diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h
index 5f8707e2a09..7a797192fcf 100644
--- a/arch/arm/plat-s3c/include/plat/pm.h
+++ b/arch/arm/plat-s3c/include/plat/pm.h
@@ -127,6 +127,18 @@ extern void s3c_pm_dbg(const char *msg, ...);
#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)
#endif
+#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
+/**
+ * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs
+ * @set: set bits for the state of the LEDs
+ * @clear: clear bits for the state of the LEDs.
+ */
+extern void s3c_pm_debug_smdkled(u32 set, u32 clear);
+
+#else
+static inline void s3c_pm_debug_smdkled(u32 set, u32 clear) { }
+#endif /* CONFIG_S3C_PM_DEBUG_LED_SMDK */
+
/* suspend memory checking */
#ifdef CONFIG_S3C2410_PM_CHECK
diff --git a/arch/arm/plat-s3c/pm.c b/arch/arm/plat-s3c/pm.c
index 9957b539600..8d97db2c7a0 100644
--- a/arch/arm/plat-s3c/pm.c
+++ b/arch/arm/plat-s3c/pm.c
@@ -21,11 +21,10 @@
#include <asm/cacheflush.h>
#include <mach/hardware.h>
+#include <mach/map.h>
#include <plat/regs-serial.h>
#include <mach/regs-clock.h>
-#include <mach/regs-gpio.h>
-#include <mach/regs-mem.h>
#include <mach/regs-irq.h>
#include <asm/irq.h>
@@ -326,6 +325,9 @@ static int s3c_pm_enter(suspend_state_t state)
S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
+ /* LEDs should now be 1110 */
+ s3c_pm_debug_smdkled(1 << 1, 0);
+
s3c_pm_check_restore();
/* ok, let's return from sleep */