On Thu, Nov 01, 2012 at 01:56:07PM +0100, Jean Delvare wrote: > On Mon, 29 Oct 2012 10:28:30 -0700, Guenter Roeck wrote: > > On Mon, Oct 29, 2012 at 05:55:20PM +0100, Jean Delvare wrote: > > > On Sun, 28 Oct 2012 11:20:01 -0700, Guenter Roeck wrote: > > > > diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87 > > > > index 92ce617..3d938aea 100644 > > > > --- a/Documentation/hwmon/it87 > > > > +++ b/Documentation/hwmon/it87 > > > > @@ -217,4 +217,5 @@ Temperature offset attributes > > > > The driver supports temp[1-3]_offset sysfs attributes to adjust the reported > > > > temperature for thermal diodes or diode connected thermal transistors. > > > > If a temperature sensor is configured for thermistors, the attribute values > > > > -are ignored. > > > > +are ignored. If the thermal sensor type is Intel PECI, the temperature offset > > > > +must be programmed to the critical CPU temperature. > > > > > > I don't quite get this part.. Who should do that, and how? > > > > The BIOS, presumably. It does it on my board, but wrongly. It sets it > > to 97 degrees C, while the CPU's Tcrit is 105 degrees C. I fixed the > > offset to 105, and now the reported temperature matches the CPU temperature > > (and moves with it). This is how I found out about PECI support in the > > first place. > > In which register is the PECI temperature offset value stored? I am > looking at the IT8720F datasheet and I can't find it. > On IT8728F it is in the diode zero degree adjust registers. I found this from experiments; it is not mentioned in the datasheet. I would guess it is the same on the other chips, though I can not test it on those. Guenter _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
