Re: [RFC] [PATCH] Device Tree on ARM platform

Benjamin Herrenschmidt
2009-05-28T08:21:06Z

On Thu, 2009-05-28 at 06:01 +0800, Mitch Bradley wrote:
> If anybody is interested, the core ARM support has been added to the
> Open Firmware tree at svn://openfirmware.info/openfirmware - the same
> version of OFW that's used on OLPC - under an MIT-style license. This is
> a full-featured Open Firmware whose lineage traces back to the original
> Open Boot implementation that I wrote for Sun starting in 1987.
>
> It's not yet fully elaborated for specific platforms and devices, but it
> does contain all the core IEE1275 device tree stuff and the standard
> support packages. It gets you to an ok prompt on Beagle Board and
> Gumstix Overo systems. The source-level and assembly-language debuggers
> are fully functional. As currently configured on those systems, you can
> load it into memory either via u-boot or instead of u-boot.
>
> This base ARM port, while newly released as FOSS, is quite solid, having
> been developed some years ago for the Digital (RIP) DNARD system.
>
> I'd be happy to work with people to add deeper support for specific
> device and platforms.

That's actually great news !

While most of the discussion here revolves around whether to use a
device-tree or not, mostly with the flattened device-tree format in
mind, having a real OF implementation is always a much better option
as far as I'm concerned.

Cheers,
Ben.