Re: Linux running on a PCI Option device?

[Greg Ungerer <gerg@snapgear.com>]

Hi Jon,

Jon Ringle wrote:
> I am working on a new board that will have Linux running on an xscale 
> processor. This board will be a PCI Option device. I currently have a IXDP465 
> eval board which has a PCI Option connector that I will use for prototyping. 
> From what I can tell so far, Linux wants to scan the PCI bus for devices as 
> if it is the PCI host. Is there any provision in Linux so that it can take on 
> the role of a PCI option rather than a PCI host?

Have a look at the code in arch/arm/mach-ixp4xx/common-pci.c, in
the function ixp4xx_pci_preinit().

It does a check on whether the PCI bus is configured as HOST or not.
I don't know if that code support is enough for it all to work right
though (I certainly haven't tried it on either the 425 or 465...)

Regards
Greg



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