[PATCH V2] ARM: dts: DRA7: provide arch-timer frequenecy parameter

On 09/18/2013 06:33 AM, Sricharan R wrote:

Hi,

On Tuesday 17 September 2013 10:31 PM, Nishanth Menon wrote:

quoted

CNTFREQ isn't pre-programmed on DRA7 just like O5, so provide the
timer frequency via DT. Without a valid value arch_timer_init results
in div0 crash.

Cc: R Sricharan <redacted>
Cc: Rajendra Nayak <redacted>
Cc: Sourav Poddar <redacted>

Acked-by: Santosh Shilimkar <redacted>
Signed-off-by: Nishanth Menon <nm@ti.com>
---

Based on Benoit's for_3.13/dts branch. 
http://git.kernel.org/cgit/linux/kernel/git/bcousson/linux-omap-dt.git/log/?h=for_3.13/dts

Crash log: http://pastebin.com/B2sDauS9

V2: commit message update
V1: https://patchwork.kernel.org/patch/2903261/

 arch/arm/boot/dts/dra7.dtsi |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index c98997b..71c2749 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi

@@ -50,6 +50,7 @@
 			     <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
 			     <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
+		clock-frequency = <6144000>;
 	};
 
 	gic: interrupt-controller at 48211000 {

This is not the right way to pass the frequency. In fact, initially the frequency value was present
when the dts was added, but had to revert it back based on the feedbacks. Please refer below.
  

http://www.mail-archive.com/linux-omap at vger.kernel.org/msg93832.html


Also posted the below patch to fix this,

    http://marc.info/?l=linux-omap&m=137950345528918&w=2

Thanks for a better alternative. at least my boot tests indicate that
the patch works fine.


-- 
Regards,
Nishanth Menon