Re: [lm-sensors] [PATCH] hwmon: Add driver for VIA CPU coretemperature

From: Harald Welte
Date: Fri Jun 12 2009 - 09:06:58 EST


On Fri, Jun 12, 2009 at 06:46:45AM -0500, Michael S. Zick wrote:
> > Temperature values are supposed to be expressed in millidegrees C, not
> > degrees C as it seems to be doing (although 25 degrees C seems pretty
> > low for a CPU temperature?) The drivers needs to multiply values by
> > 1000 before exporting them to sysfs. Then "sensors" will report the
> > correct temperature value.
> >
>
> Ah, 25 degrees C is room temperature - real hard for the junction temperature
> to be 25 degrees C with power applied; lacking an infinitely perfect heatsink.
>
> Look for an "off by one" error in shifting or masking the value.

there is no shifting and the masking is 0xffffffff :)

it might be that the BIOS is doing something wrong when programming the
calibration MSR's at early botoup. I would need the contents of MSR
0x1160 ... 0x116C as well as 0x1152 and 0x1153 to be able to determine that.

--
- Harald Welte <HaraldWelte@xxxxxxxxxxx> http://linux.via.com.tw/
============================================================================
VIA Free and Open Source Software Liaison
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