Re: [PATCH 1/5] hwmon: (coretemp) Drop dependency on PCI for TjMax detection on Atom CPUs

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On Wed, Oct 10, 2012 at 07:00:39AM -0700, Guenter Roeck wrote:
> On Wed, Oct 10, 2012 at 03:44:56PM +0200, Jean Delvare wrote:
> [ ... ]
> > 
> > Documentation/hwmon/coretemp says 125°C for Atom 230 and 330. N5xx
> > aren't listed in this document BTW.
> > 
> Reminds me ... we have a discrepancy in the code regarding the 230, and use 100
> degrees C instead of 125 for it. Any idea where this is documented ? I wasn't
> able to find definite numbers over the weekend, and I don't recall why I used
> 100 for the 230 when I introduced tjmax_table.
> 
Followup on this after some more digging. Datasheets actually claim Tjmax for
both 230 and 330 to be 90 degrees C. 125 degrees C is the shutdown temperature,
which is different (the N4xx/D4xx/D5xx also have a shutdown temperature of 125
degrees C). We do know that we have to use Tjmax of 125 C for the 330 for somewhat
reasonable temperature readings. So the big remaining question is which
temperature is used as calibration point for the 230.

Thanks,
Guenter

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