Subject: [PATCH] ARM: DRA7: realtime_counter: Add ratio registers for 20MHZ sys-clk frequency\

From: [email-masked] (Nishanth Menon)
Date: Wed, 18 Sep 2013 07:56:26 -0500

On 16:50-20130918, Sricharan R wrote:
> The real time counter also called master counter, is a free-running
> counter. It produces the count used by the CPU local timer peripherals
> in the MPU cluster. The timer counts at a rate of 6.144 MHz.
> 
> The ratio registers are missing for a sys-clk of 20MHZ which is used
> by DRA7 socs. So because of this, the counter was getting wrongly
> programmed for a sys-clk of 38.4Mhz(default). So adding the ratio
> registers for 20MHZ sys-clk.
> 
> Cc: Santosh Shilimkar <[email-masked]>
> Signed-off-by: Sricharan R <[email-masked]>

Tested-by: Nishanth Menon <[email-masked]>
platform: DRA7-evm

> ---
>  arch/arm/mach-omap2/timer.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
> index e1528a0..fd9238d 100644
> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -515,6 +515,10 @@ static void __init realtime_counter_init(void)
>  		num = 8;
>  		den = 25;
>  		break;
> +	case 20000000:
> +		num = 192;
> +		den = 625;
> +		break;
>  	case 2600000:
>  		num = 384;
>  		den = 1625;
> -- 
> 1.7.9.5
> 
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-- 
Regards,
Nishanth Menon