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

[Christian Zigotzky]

Hi Bjorn,

Sorry I'm bothering you again. Is this small out of tree init routine in 
the Nemo patch? I haven't get an answer from Darren yet and I didn't 
found the small out of tree init routine in the Nemo patch. Please find 
attached the Nemo patch. Maybe you can find this small out of tree init 
routine.

What do you think of this following code?

if (sb600_bus == -1)
+       {
+               busp = pci_find_bus(0, 0);
+               pa_pxp_read_config(busp, PCI_DEVFN(17,0), 
PCI_SECONDARY_BUS, 1, &val);
+
+               sb600_bus = val;
+
+               printk(KERN_CRIT "NEMO SB600 on bus %d.\n",sb600_bus);
+       }

Thanks,
Christian


On 04 December 2017 at 12:40PM, Darren Stevens 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
 >
 >

-------------- next part --------------
A non-text attachment was scrubbed...
Name: nemo_4.14-1.patch
Type: text/x-patch
Size: 10795 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20171222/7d4a9dfc/attachment-0001.bin>