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

From: [email-masked] (Sricharan R)
Date: Wed, 18 Sep 2013 17:03:27 +0530

Hi,

On Tuesday 17 September 2013 10:31 PM, Nishanth Menon wrote:
> 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 <[email-masked]>
> Cc: Rajendra Nayak <[email-masked]>
> Cc: Sourav Poddar <[email-masked]>
>
> Acked-by: Santosh Shilimkar <[email-masked]>
> Signed-off-by: Nishanth Menon <[email-masked]>
> ---
>
> 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

Regards,
 Sricharan