Re: [PATCH] [POWERPC] 85xx: Add basic Uniprocessor MPC8572 DS port

Scott Wood
2007-09-11T17:48:54Z

Olof Johansson wrote:
> On Tue, Sep 11, 2007 at 12:21:30PM -0500, Scott Wood wrote:
>> Olof Johansson wrote:
>>> On Tue, Sep 11, 2007 at 11:00:28AM -0500, Kumar Gala wrote:
>>>> well the ifdefs are orthogonal. We don't have a way of knowing
>>>> primary from the device tree today.
>>> How about something like "fsl,primary-phb" in the bus device node? I don't
>>> know, maybe it's already been discussed and turned down for some reason.
>> It's more of a Linux issue than anything to do with the hardware.
>
> That doesn't stop firmware from telling linux which bus is the primary
> one on the system to help out.

The entire notion of a "primary" PCI bus is due to a Linux flaw.

If we did put it in the device tree, it should be something like
"linux,primary-phb". But since Linux can tell from the node's children,
there doesn't seem to be much point.

-Scott