linux-kernel - Re: [PATCH] fsl/mpic: Document and use the "big-endian" device-tree flag

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Message-Id: <DE2E2CDA-D373-4E48-82EA-B8E1F05236D9@kernel.crashing.org>
Date:	Thu, 5 Jan 2012 12:35:30 -0600
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Kyle Moffett <Kyle.D.Moffett@...ing.com>
Cc:	linuxppc-dev@...ts.ozlabs.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	Stuart Yoder <stuart.yoder@...escale.com>,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fsl/mpic: Document and use the "big-endian" device-tree flag


On Dec 22, 2011, at 10:25 AM, Kyle Moffett wrote:

> The MPIC code checks for a "big-endian" property and sets the flag
> MPIC_BIG_ENDIAN if one is present.  Unfortunately, the PowerQUICC-III
> compatible device-tree does not specify it, so all of the board ports
> need to manually set that flag when calling mpic_alloc().
> 
> Document the flag and add it to the pq3 device tree.  Existing code
> will still need to pass the MPIC_BIG_ENDIAN flag because their dtb may
> not have this property, but new platforms shouldn't need to do so.
> 
> Signed-off-by: Kyle Moffett <Kyle.D.Moffett@...ing.com>
> ---
> .../devicetree/bindings/powerpc/fsl/mpic.txt       |    9 ++++++++-
> arch/powerpc/boot/dts/fsl/pq3-mpic.dtsi            |    1 +
> 2 files changed, 9 insertions(+), 1 deletions(-)

need to update arch/powerpc/boot/dts/fsl/qoriq-mpic.dtsi

- k
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