Re: [PATCH 2/4] sparc: break out some prom device-tree buildingcode out into drivers/of

From: Andres Salomon
Date: Tue Jun 29 2010 - 11:03:41 EST

On Tue, 29 Jun 2010 00:50:08 -0700
Grant Likely <grant.likely@xxxxxxxxxxxx> wrote:

> On Mon, Jun 28, 2010 at 7:00 PM, Andres Salomon <dilinger@xxxxxxxxxx> wrote:
> >
> > Stick code into drivers/of/pdt.c (Prom Device Tree) that other
> > architectures with OpenFirmware resident in memory can make use of.
> >
> > Signed-off-by: Andres Salomon <dilinger@xxxxxxxxxx>
> Hi Andres,
> The patch itself looks fine, but there are currently two methods for
> extracting the device tree from open firmware; one in arch/powerpc
> using the flattened format, and one in arch/sparc. I don't want to
> end up maintaining both methods in drivers/of, and there has also some
> discussions on moving the powerpc version into common code. I've been
> thinking about using the powerpc approach to support ARM platforms
> using both the flat tree and real OFW.
> Ben, what say you? Before I do anything I'd like to have your opinion.

So you're saying that you want ARM (and sparc, and OLPC) to generate a
flat tree by calling into OFW? Sparc and OLPC have very similar
mechanisms for getting device tree info from OFW, so it makes sense to
share code between them.

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