[Skiboot] [PATCH 0/3] P9 core dts support

Rob Lippert rlippert at google.com
Fri Feb 24 05:04:32 AEDT 2017


On Thu, Feb 23, 2017 at 5:01 AM, C├ędric Le Goater <clg at kaod.org> wrote:
> Rob,
>
> Some update,
>
>>> Cedric, any update on getting the P9 DTS sensors to work with skiboot?
>>>
>>> We have not tested yet since I was waiting for confirmation on your side.
>>
>> The skiboot framework is in place (with this patch) and the kernel
>> module is creating the hwmon sysfs entries. I need to dig a little
>> further to see why we read zeroes on the core DTS as I did not see
>> any XSCOM errors.
>>
>> I will try on another system next week.
>
> So it seems that the VPD in the OpenPOWER firmware misses calibration
> settings for the core thermal latches. Those settings being zero
> by default, the result of the equation is zero for the DTS.
>
> I am working on getting these included in the VPD now.

OK, will we need a VPD update for the CPU (which I don't think we can
do) or just the planar VPD?

-Rob


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