From: Jaecheol Lee <jc.lee@xxxxxxxxxxx>
This patch adds save/restore for Power Control Register and
Diagnostic Register.
Signed-off-by: Jaecheol Lee <jc.lee@xxxxxxxxxxx>
Signed-off-by: Kukjin Kim <kgene.kim@xxxxxxxxxxx>
---
arch/arm/mach-exynos4/sleep.S | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-exynos4/sleep.S b/arch/arm/mach-exynos4/sleep.S
index d55d38c..4fe13fc 100644
--- a/arch/arm/mach-exynos4/sleep.S
+++ b/arch/arm/mach-exynos4/sleep.S
@@ -42,6 +42,15 @@
ENTRY(s3c_cpu_save)
stmfd sp!, { r3 - r12, lr }
+
+ adr r0, sleep_save_misc
+
+ mrc p15, 0, r2, c15, c0, 0 @ read power control register
+ str r2, [r0], #4
+
+ mrc p15, 0, r2, c15, c0, 1 @ read diagnostic register
+ str r2, [r0], #4
+
ldr r3, =resume_with_mmu
bl cpu_suspend
@@ -56,6 +65,14 @@ ENTRY(s3c_cpu_save)
b early_wakeup
resume_with_mmu:
+ adr r0, sleep_save_misc
+
+ ldr r1, [r0], #4
+ mcr p15, 0, r1, c15, c0, 0 @ write power control register
+
+ ldr r1, [r0], #4
+ mcr p15, 0, r1, c15, c0, 1 @ write diagnostic register
+
mov r0, #1
early_wakeup:
@@ -71,6 +88,11 @@ early_wakeup:
.word 0x2bedf00d
+ /* To save more cpu register */
+sleep_save_misc:
+ .long 0
+ .long 0
+
/*
* s3c_cpu_resume
*
--
1.7.1
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