SB600 for the Nemo board has non-zero devices on non-root bus

[Christian Zigotzky]

Darren,

What do you think about Olof’s solution?

Link: http://forum.hyperion-entertainment.biz/viewtopic.php?f=35&t=3891&p=43206#p43201

Thanks,
Christian

Sent from my iPhone

> On 4. Dec 2017, at 12:40, Darren Stevens <darren at stevens-zone.net> wrote:
> 
> Hello Bjorn
> 
> Firstly sorry for not being able to join in this discussion, I have been
> moving house and only got my X1000 set up again yesterday..
> 
>> On 30/11/2017, Bjorn Helgaas wrote:
>> I *think* something like the patch below should make this work if you
>> use the "pci=pcie_scan_all" parameter.  We have some x86 DMI quirks
>> that set PCI_SCAN_ALL_PCIE_DEVS automatically.  I don't know how to do
>> something similar on powerpc, but maybe you do?
> 
> Actually the root ports on the Nemo's PA6T processor don't respond to the
> SB600 unless we turn on a special 'relax pci-e' bit in one of its control
> registers. We use a small out of tree init routine to do this, and there
> would be the ideal place to put a call to
> pci_set_flag(PCI_SCAN_ALL_PCIE_DEVS).
> 
> This patch fixes the last major hurdle to getting the X1000 fully supported in
> the linux kernel, so thanks very much for that.
> 
> Regards
> Darren
> 
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