linux-kernel - Re: [PATCH v3 2/6] ARM: davinci: da850-dm646x: remove the SRAM

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Message-ID: <20121004125455.GE11149@beef>
Date:	Thu, 4 Oct 2012 08:54:55 -0400
From:	Matt Porter <mporter@...com>
To:	Sekhar Nori <nsekhar@...com>
Cc:	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Russell King <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 2/6] ARM: davinci: da850-dm646x: remove the SRAM_VIRT
 iotable entry

On Thu, Oct 04, 2012 at 05:23:34PM +0530, Sekhar Nori wrote:
> On 10/3/2012 8:25 PM, Matt Porter wrote:
> > From: Ben Gardiner <bengardiner@...ometrics.ca>
> > 
> > The sram regions defined for da850-dm646x in their iotable entries are also
> > defined in their davinci_soc_info's.
> > 
> > Remove this duplicate information which is now uneccessary since sram
> > init will ioremap the regions defined by their davinci_soc_info's.
> > 
> > Since this removal completely removes all uses of SRAM_VIRT, also remove
> > the SRAM_VIRT definition.
> > 
> > Signed-off-by: Ben Gardiner <bengardiner@...ometrics.ca>
> > Tested-by: Matt Porter <mporter@...com>
> 
> What testing was done with this patch? Can you please add that
> information to the commit text as well.

I have only tested on AM180x with uio_pruss and davinci-pcm (series
for that posted a short while ago). In the uio_pruss case, I run the
sample applications from the userspace PRU package that test
communication with the shared SRAM, DDR, and internal PRU SRAM. For
davinci-pcm, my series enables shared SRAM ping-pong buffering which is
working comparably to pcm capture/playback without ping-pong buffering
enabled on AM180x.

I have not tested PM at all...yet.

I'll add this detail to the commit.

-Matt
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