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SubjectRe: [PATCH 2.5] Make root PCI bus child of system_bus in device tree
On Mar 26 2003, at 00:35, Alan Cox was caught saying:
> On Tue, 2003-03-25 at 23:16, Deepak Saxena wrote:
> > All,
> >
> > The following patch updates the PCI subsystem so that root PCI host
> > bridges appear as devices hanging off the system bus instead of root
>
> This seems odd for some systems we support. Older PARISC for example
> have PCI busses hanging off gecko. I do agree with you for the general
> case. So systems whose root level bridges are 'normal' should reflect
> this and I guess others should attach them to the relevant bus.
>
> Over time it seems that PCI is going to become a secondary bus like
> ISA did as well. In fact it already has in many ways, its just things
> like VLINK and the Intel hub busses look like PCI to us

Sounds like more reasoning to just force the caller to provide a parent.
'normal' is a moving target and I'd rather not have the code making
assumptions and let the platform's kernel developer explictly map
the PCI bridge into the system.

~Deepak

--
Deepak Saxena
MontaVista Software - Powering the Embedded Revolution - www.mvista.com

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