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Date: Tue, 7 Aug 2007 13:35:38 +1000
From: David Gibson <david@gibson.dropbear.id.au>
To: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [PATCH 2/6] PowerPC 440EPx: Sequoia DTS
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On Mon, Aug 06, 2007 at 10:20:01PM +0200, Segher Boessenkool wrote:
> >>> +     - compatible : should contain the specific model of flash 
> >>> chip(s) used
> >>> +       followed by either "cfi-flash" or "jedec-flash"
> >>
> >>     This "compatible" prop (and the node in whole) doesn't say a
> >> thing about how the flash is mapped into the CPU address space.  I
> >> strongly disagree that this node provides enough info to select a
> >> driver. :-/
> >
> > To be honest, I'm not sure that describing the mapping is really the
> > job of the compatible property.  That the flash is mapped into the
> > address space is kind of implicit in the way the reg interacts with
> > the parents' ranges property.
> 
> Exactly.
> 
> > Can you describe some of the options for *not* direct mapped flash
> > chips - I can't reasonably come up with a way of describing the
> > distinction when I've never seen NOR flash other than direct mapped.
> 
> What, you've never seen SPI flash or IIC flash?  :-)

Nope.  Colour me ignorant :-p.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson