linux-kernel - Re: [PATCH] thermal: intel_pch_thermal: Add PCI ids for Lewisburg PCH.

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Date:   Thu, 16 Jan 2020 10:42:50 -0800
From:   Andres Freund <andres@...razel.de>
To:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Cc:     Tushar Dave <tushar.n.dave@...el.com>,
        Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thermal: intel_pch_thermal: Add PCI ids for Lewisburg
 PCH.

Hi,

On 2020-01-16 05:53:13 -0800, Srinivas Pandruvada wrote:
> On Wed, 2020-01-15 at 10:44 -0800, Andres Freund wrote:
> > I noticed that I couldn't read the PCH temperature on my workstation
> > (C620 series chipset, w/ 2x Xeon Gold 5215 CPUs) directly, but had to
> > go
> > through IPMI. Looking at the data sheet, it looks to me like the
> > existing intel PCH thermal driver should work without changes for
> > Lewisburg.
> Does the temperature reading match with what you read via IPMI?

It does:

root@...rk3:~# ipmitool sdr|grep ^PCH
PCH Temp         | 58 degrees C      | ok

andres@...rk3:~$ cat /sys/class/thermal/thermal_zone0/type
pch_lewisburg
andres@...rk3:~$ cat /sys/class/thermal/thermal_zone0/temp
58000

And if I generate some load, it rises for both:
root@...rk3:~# ipmitool sdr|grep ^PCH
PCH Temp         | 60 degrees C      | ok
andres@...rk3:~$ cat /sys/class/thermal/thermal_zone0/temp
60000

Regards,

Andres