Hi,
On Thursday 18 August 2011 03:55 PM, Marek Szyprowski wrote:
clkdev framework uses global mutex to protect clock tree, so it is not
possible to call clk_get() in interrupt context. This patch fixes this
issue and makes system reset by watchdog call working again.
Signed-off-by: Marek Szyprowski<m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park<kyungmin.park@xxxxxxxxxxx>
---
arch/arm/plat-samsung/clock.c | 11 +++++++++++
arch/arm/plat-samsung/include/plat/clock.h | 3 +++
.../arm/plat-samsung/include/plat/watchdog-reset.h | 10 +++-------
3 files changed, 17 insertions(+), 7 deletions(-)
history:
v3:
- moved initialization to arch_initcall, cleaned the code
v2:
- added missing '__init' section modifiers
(snip)
I tried to test this patch with ORIGEN board.
I took the ORIGEN board support patch from kgene's
next-samsung-board-v3.1 branch and rebased it onto the for-next branch
for testing.
The system reboot stops at a message saying "Restarting system" and hangs.
However applying below patch reboots the system without even applying
Marek's patch.
Is there something wrong with mach-origen.c or u-boot [1]?
[1] git://git.linaro.org/people/angus/u-boot.git (origen)
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
From: Tushar Behera <tushar.behera@xxxxxxxxxx>
Date: Fri, 19 Aug 2011 14:47:04 +0530
Subject: [PATCH] [TEST] ARM: Disabling cache operation during system reset
On ORIGEN/SMDKV310 board, system reboot hangs during cache disabling
call in arm_machine_restart()=>cpu_proc_fin(). Applying given patch
enables the system to reboot properly.
This patch is no way a proposed solution. It is intended for further
investigation.
Signed-off-by: Tushar Behera <tushar.behera@xxxxxxxxxx>
---
arch/arm/mm/proc-v7.S | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index a30e785..1bffc35 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -43,10 +43,12 @@ ENTRY(cpu_v7_proc_init)
ENDPROC(cpu_v7_proc_init)
ENTRY(cpu_v7_proc_fin)
+#if 0
mrc p15, 0, r0, c1, c0, 0 @ ctrl register
bic r0, r0, #0x1000 @ ...i............
bic r0, r0, #0x0006 @ .............ca.
mcr p15, 0, r0, c1, c0, 0 @ disable caches
+#endif
mov pc, lr
ENDPROC(cpu_v7_proc_fin)
--
1.7.4.1
--
Tushar Behera
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