linux-kernel - Re: [PATCH 5/5] ARM: gic: add OF based initialization

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Date:	Mon, 19 Sep 2011 11:44:38 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	"Cousson, Benoit" <b-cousson@...com>,
	Rob Herring <robherring2@...il.com>,
	"marc.zyngier@....com" <marc.zyngier@....com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	"jamie@...ieiles.com" <jamie@...ieiles.com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 5/5] ARM: gic: add OF based initialization

On Mon, Sep 19, 2011 at 7:33 AM, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
> On Mon, Sep 19, 2011 at 11:47:18AM +0200, Cousson, Benoit wrote:
>> Since the cpumask is not relevant for the SPI, maybe having two
>> interrupt controllers will be more relevant. Or maybe 3, since there is
>> some SGIs as well.
>
> I don't think anyone uses SGIs outside of the common SMP code.
> Therefore they're handled entirely separately for the root GIC.
>
> (If there's two GICs - some platforms do have two - then the SGIs on
> the non-root GIC are unused.)

...and since SGIs aren't external HW inputs to the GIC, there really
isn't any need to reflect them in the GIC DT binding.

g.
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