From: Santosh Shilimkar <santosh.shilimkar@ti.com>
To: Sricharan R <r.sricharan@ti.com>, tony@atomide.com
Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
nm@ti.com, Rajendra Nayak <rnayak@ti.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH V5] ARM: OMAP5/DRA7: realtime_counter: Configure CNTFRQ register
Date: Thu, 10 Oct 2013 09:12:14 -0400 [thread overview]
Message-ID: <5256A7AE.6000605@ti.com> (raw)
In-Reply-To: <1381391028-4189-1-git-send-email-r.sricharan@ti.com>
On Thursday 10 October 2013 03:43 AM, Sricharan R wrote:
> From: R Sricharan <r.sricharan@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@ti.com>
> Cc: Nishanth Menon <nm@ti.com>
> Cc: Rajendra Nayak <rnayak@ti.com>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Tony Lindgren <tony@atomide.com>
> Tested-by: Nishanth Menon <nm@ti.com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Signed-off-by: Sricharan R <r.sricharan@ti.com>
> ---
> [V5] Removed the use of extern variable in omap-smp.c
> as per suggestion from Santosh Shilimkar <santosh.shilimkar@ti.com>
>
Thanks for the updates Sricharan. Looks fine now.
Tony, Can you apply this version if you are fine with it.
Regards,
Santosh
next prev parent reply other threads:[~2013-10-10 13:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-10 7:43 [PATCH V5] ARM: OMAP5/DRA7: realtime_counter: Configure CNTFRQ register Sricharan R
2013-10-10 13:12 ` Santosh Shilimkar [this message]
2013-10-10 17:15 ` Tony Lindgren
2013-10-12 0:34 ` Tony Lindgren
2013-10-12 0:37 ` Santosh Shilimkar
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