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

On Wed, Dec 6, 2017 at 4:44 AM, Michael Ellerman [off-list ref] wrote:

Olof Johansson [off-list ref] writes:

quoted

On Sat, Dec 02, 2017 at 01:54:41PM +0100, Christian Zigotzky wrote:

quoted

On 02 December 2017 at 00:27AM, Bjorn Helgaas wrote:

quoted

Thanks for testing that.  I'll merge a similar patch for v4.16.

I don't think using "pci=pcie_scan_all" is really an acceptable
long-term answer for you, though.  Is there some way we can identify
at run-time whether we're on a Nemo system?  If so, we can make this
happen automatically.

Bjorn

Hi Bjorn,

Many thanks for your effort! I appreciate it very much. :-)

We can identify the Nemo board at the boot time. See dmesg output: [
0.061592] NEMO SB600 IOB base e0000000

@linuxppc-dev
Any other ideas? Maybe the same as we can identify the other P.A. Semi
boards (Electra, Chitra, and Athena).

@Olof
Maybe you know how we can identify the P.A. Semi Nemo board at the run-time.

@Darren
Do you have an idea?

The below patch, together with Bjorn's, should do it. Christian, can you test
and report back?

I'm guessing it won't do any harm to set this on non-X1000 platforms. My
test system is currently powered down so I can't check.

My pasemi board had been powered off for a while and when I turned it
back on something popped, the power supply blew up and tripped a
breaker.

So I also can't test this, at least for now, until I get my "allowed to
use hardware" license back from my colleagues in the office.

Ouch. Sounds like it's the PSU not the board. Hopefully there was no
board damage, let me know if you need a replacement though and I'll
see what I can find.


-Olof