[PATCH V5] ARM: OMAP5/DRA7: realtime_counter: Configure CNTFRQ register

Santosh Shilimkar santosh.shilimkar at ti.com
Thu Oct 10 09:12:14 EDT 2013


On Thursday 10 October 2013 03:43 AM, Sricharan R wrote:
> From: R Sricharan <r.sricharan at ti.com>
> 
> The realtime counter called master counter, produces the count
> used by the private timer peripherals in the MPU_CLUSTER. The
> CNTFRQ per cpu register is used to denote the frequency of the counter.
> Currently the frequency value is passed from the
> DT file, but this is not scalable when we have other non-DT guest
> OS. This register must be set to the right value by the
> secure rom code. Setting this register helps in propagating the right
> frequency value across OSes.
> 
> More discussions and the reason for adding this in a non-DT
> way can be seen from below.
> http://www.mail-archive.com/linux-omap@vger.kernel.org/msg93832.html
> 
> So configuring this secure register for all the cpus here.
> 
> Cc: Santosh Shilimkar <santosh.shilimkar at ti.com>
> Cc: Nishanth Menon <nm at ti.com>
> Cc: Rajendra Nayak <rnayak at ti.com>
> Cc: Marc Zyngier <marc.zyngier at arm.com>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: Tony Lindgren <tony at atomide.com>
> Tested-by: Nishanth Menon <nm at ti.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
> Signed-off-by: Sricharan R <r.sricharan at ti.com>
> ---
>  [V5] Removed the use of extern variable in omap-smp.c
>       as per suggestion from Santosh Shilimkar <santosh.shilimkar at ti.com>
> 
Thanks for the updates Sricharan. Looks fine now.

Tony, Can you apply this version if you are fine with it.

Regards,
Santosh



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