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

Andres Salomon
2010-06-29T23:36:25Z

On Tue, 29 Jun 2010 15:42:54 -0600
Grant Likely <grant.likely@secretlab.ca> wrote:

> On Tue, Jun 29, 2010 at 9:03 AM, Andres Salomon <dilinger@queued.net>
> wrote:
[...]
>
> > Sparc and OLPC have very similar
> > mechanisms for getting device tree info from OFW, so it makes sense
> > to share code between them.
>
> Other than the flattened tree step; is the powerpc method dissimilar
> from the Sparc and OLPC method for talking to OFW? (This is not a
> rhetorical question, I'm want to know if I'm missing some details).
> The main difference I know about is that OFW can still kept alive at
> runtime for sparc, which powerpc does not do. However, keeping OFW
> callable is a separate issue from how to extract the device tree.
>

After having a look at powerpc's flatten_device_tree, I don't see any
obvious reason why OLPC couldn't use this (though it still strikes me
as weird to go from prom->fdt->dt when the option of prom->dt is
available and less complex). Do you already have the patches that put
this into drivers/of/?