Re: [RFC PATCH 00/12] Merge common OpenFirmware device tree code

On Wed, Oct 07, 2009 at 09:52:43AM -0400, Sam Creasey wrote:

On Wed, Oct 07, 2009 at 03:18:04PM +1000, Julian Calaby wrote:

quoted

On the subject of merging code, I know that the SUN3 code in m68k uses
a similar prom interface to the sparc32 code. (and I've also
considered unifying that and ... well ... see above) Does anyone know
if it has an OpenFirmware interface for it's devices? Is OF on SUN3
even remotely useful? Does Linux on SUN3 even work with modern
kernels?

Sun3 doesn't have OF, though I've got some dormant patches to add an
OF emulation layer to make it easier to reuse Sparc drivers on
Sun3...   Never finished enough to submit, so it probably shouldn't
affect anything you're doing here.

I was also looking at using the OF code on m68k, but for a different
reason. My goal was to get macio_bus working so we can merge a few
of the m68k Mac drivers into the ppc Mac drivers. The simplest way
to do that seemed to be supporting OF since macio_dev is a wrapper
for of_device. It was also a nice way to build up a table of all the
onboard devices in memory. Hopefully it would enable better user-space
device detection as well.

I got the framework built against an older kernel, but it wasn't enough
to be useful at that point. This set of patches could help quite a bit.

	Brad Boyer
	flar@allandria.com