linux-kernel - RE: [PATCH] ARM: OMAP2+: gpmc: Fix kernel BUG for DT boot mode

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Date:	Wed, 10 Oct 2012 14:19:40 +0000
From:	"Hiremath, Vaibhav" <hvaibhav@...com>
To:	"Porter, Matt" <mporter@...com>
CC:	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"Mohammed, Afzal" <afzal@...com>, Tony Lindgren <tony@...mide.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH] ARM: OMAP2+: gpmc: Fix kernel BUG for DT boot mode

On Wed, Oct 10, 2012 at 19:30:27, Porter, Matt wrote:
> On Tue, Oct 09, 2012 at 02:27:20PM +0530, Vaibhav Hiremath wrote:
> > With recent changes in omap gpmc driver code, in case of DT
> > boot mode, where bootloader does not configure gpmc cs space
> > will result into kernel BUG() inside gpmc_mem_init() function,
> > as gpmc cs0 gpmc_config7[0].csvalid bit is set to '1' and
> > gpmc_config7[0].baseaddress is set to '0' on reset.
> > 
> > This use-case is applicable for any board/EVM which doesn't have
> > any peripheral connected to gpmc cs0, for example BeagleXM and
> > BeagleBone, so DT boot mode fails.
> > 
> > This patch adds of_have_populated_dt() check before creating
> > device, so that for DT boot mode, gpmc probe will not be called
> > which is expected behavior, as gpmc is not supported yet from DT.
> > 
> > Signed-off-by: Vaibhav Hiremath <hvaibhav@...com>
> > Cc: Afzal Mohammed <afzal@...com>
> > Cc: Tony Lindgren <tony@...mide.com>
> > Cc Paul Walmsley <paul@...an.com>
> > ---
> > This should go in for rc1, as this breaks AM33xx boot.
> 
> Fixes BeagleBone on mainline.
> 
> Tested-by: Matt Porter <mporter@...com>
> 

Thanks Matt and Afzal,

Tony can this be picked up for rc1?? I know you have already sent pull 
request for rc1, but by any chance you are planning to send another request?

Thanks,
Vaibhav
> -Matt
> 

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