Re: The usage of compatible 'simple-bus'

[Scott Wood <scottwood-KZfg59tc24xl57MIdRCFDg@public.gmane.org>]

On Wed, Jan 07, 2009 at 11:51:12AM +0800, Li Yang wrote:
> > I see two sensible options for this situation:
> >        - Move the MDIO node to outside the gianfar MAC node.  I think
> > this is already done on some boards with gianfar?
> 
> Yes, we can use good old way.  But as Scott has moved the MDIO into
> the gianfar node on MPC8313, maybe it's a better way to describe the
> relationship of the two parts.

Ah, right, that was to reflect the clock domain situation so that someday
when I get time to do device power management the kernel can know that by
shutting down ethernet@25000 it's also shutting down mdio@24520, which is
also used by ethernet@26000.

Adding simple-bus was a bit of a hack, but it preserves the existing
binding whereby mdio sits under a simple-bus.  Ideally, the mdio node
would simply be a container for PHY nodes, and would simply be a part of
gianfar rather than a separate entity.

-Scott