[U-Boot] PCIe switch questions

[Stefan Roese <sr@denx.de>]

On Friday 14 August 2009 01:33:57 dbrazeau wrote:
> Hi. I'm planning on using a IDT PCIe switch on our custom board with a
> PPC_460 cpu.  I have searched the internet and haven't found much in the
> way of references of using a IDT PCIe switch and a PPC with U-boot.  I was
> just wondering if I should expect any issue with U-Boot/Linux communicating
> with devices connected to the PCIe switch.
>
> Are there special U-boot configuration requirement when using a PCIe
> switch? I've looked online and in U-boot documentation and haven't seen a
> whole lot of PCI configuration options except for the environment variable
> pcie_mode and disabling the PCI bus altogether.
>
> I just wanted to get some input and thoughts on what I should expect once I
> get the hardware.  Thanks.

I know of at least one project with an PPC4xx (405EX in this case) used with 
PCIe switches. IIRC, this is working fine in both U-Boot & Linux. So I 
wouldn't expect too many problems on 460EX. And if there should be some 
problem it should be possible to fix them.

Cheers,
Stefan

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