linux-kernel - Re: powerpc: dts: Fix canyonlands EMAC interrupt map

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Date:	Wed, 23 Nov 2011 12:42:18 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	David Gibson <david@...son.dropbear.id.au>
Cc:	Tanmay Inamdar <tinamdar@....com>, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Subject: Re: powerpc: dts: Fix canyonlands EMAC interrupt map

On Wed, 2011-11-23 at 12:15 +1100, David Gibson wrote:
> On Wed, Nov 23, 2011 at 08:16:40AM +1100, Benjamin Herrenschmidt wrote:
> > On Tue, 2011-11-22 at 12:41 +0530, Tanmay Inamdar wrote:
> > > Fixing interrupt mapping of EMAC for canyonlands
> > 
> > The previous stuff was odd .... but was it broken ?
> > 
> > It was done this way because the EMAC actually has more interrupts than
> > that which are routed to different UICs, and so doing a local map this
> > way allows to target multiple parents.
> 
> Well, in the canyonlands case, it appears that the interrupts went to
> the same pic, so the simpler representation should be correct as
> well.  However, there certainly are boards where they go to multiple
> pics, so we need this interrupt-map trick.

Doesn't emac has something like 4 more interrupts that we simply haven't
been bothered wiring up (because we don't use them ?)

Cheers,
Ben.


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