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Subject: Re: [PATCH 3/3] First cut at PReP support for arch/powerpc
From: Jon Loeliger <jdl@freescale.com>
To: David Gibson <david@gibson.dropbear.id.au>
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Date: Fri, 03 Aug 2007 10:24:38 -0500
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On Fri, 2007-08-03 at 01:35, David Gibson wrote:


> > > +			PIC8259: interrupt-controller {
> > > +				device_type = "i8259";
> > > 
> > > device_type = "interrupt-controller".
> 
> Is that really right?  The MPIC binding, at least, has device_type =
> "open-pic" rather than "interrupt-controller".
> 
> > > +				compatible = "prep,iic";
> > > +				reg = <	00000001 00000020  00000002
> > > +					00000001 000000a0  00000002
> > > +					00000001 000004d0  00000002>;
> > > +				interrupts = <00000000 00000003
> > > +					      00000002 00000003>;
> > > +				interrupt-parent = <&MPIC>;
> > > +			};
> > > +		};
> > > +
> > > +		MPIC: interrupt-controller@d {
> > > +			device_type = "open-pic";
> > > 
> > > device_type = "interrupt-controller".
> 
> Not according to the binding in booting-without-of.txt

My understanding here, though possibly flawed, is that the current
implementation has "open-pic" but _should_ have "interrupt-controller"
as that is the officially correct name.

I _think_ this means we need a transitional period where we update
the code to look for "interrupt-controller", and obsoletedly, looks
for the "open-pic", while we transition to the new, correct name.

I'm just betting that if I'm wrong Segher will tell me! :-)

jdl