[PATCH] omap3: beagle: Use GPTIMERi 1 for clockevents

[Premi, Sanjeev]

> -----Original Message-----
> From: linux-omap-owner at vger.kernel.org 
> [mailto:linux-omap-owner at vger.kernel.org] On Behalf Of Koen Kooi
> Sent: Saturday, June 25, 2011 1:47 PM
> To: linux-omap at vger.kernel.org List
> Cc: linux-arm-kernel; Paul Walmsley
> Subject: Re: [PATCH] omap3: beagle: Use GPTIMERi 1 for clockevents
> 
> 
> Op 24 jun 2011, om 18:23 heeft Sanjeev Premi het volgende geschreven:
> 
> > The current selection of the GPTIMER on was result of
> > a hardware issue in early versions of the Beagleboards
> > (Ax and B1 thru B4). [1] [2]
> > 
> > Its been long since the hardware issue has been fixed.
> > This patch uses GPTIMER 1 for all newer board revisions
> > incl. Beagleboard XM.

[sp] I didn't include a reason - because the problem may not
     be reproducible on the public trees.

     During tests performed in internal development trees, the
     BogoMIPS calculations @ 1GHz wouldn't go beyond "830-850"
     range. While there was no such inconsistency on OMAP3EVM.

     After few days of debug GPTIMER12 came to be only difference.
     Tracing GPTIMER12 in the spec proved quite a challenge; the
     as timer is not included in the TRM and corresponding interrupt
     is marked reserved. Paul (in cc:) obviously had access to
     documents that we don't.

     This patch is merely trying to bring parity in use of GPTIMER
     across OMAP3 boards (AND use documented IP) - taking note of
     many Beagleboards where current code is necessary.

~sanjeev