[lm-sensors] GM965 IGP temperature detector

lu zhihe tombowfly at gmail.com
Mon Nov 3 13:55:43 CET 2008

Dear Jean:

     Thank you for your advises.

     Maybe your north bridge is GM945? And the support for GM945 is under
development, according to Intel's datasheet, it only report mem.
temperature. On some 945G the vaule is always 0xFF. I had update the
"calibrated current temperature" transfer to "degree Celsius" by refer to
Intel's earlier document.

2008/11/2  Delvare <khali at linux-fr.org>

> On Sun, 26 Oct 2008 14:33:47 +0000, lu zhihe wrote:
> > Dear all:
> >
> >        I just write a little tool to detect my GM965 IGP's temperatue, it
> > bases on coreboot's inteltool.
> >        Several people try it ,and it seems work.
> >        Do you think it can be adapt to Lm-sensors ?
> >        It just use PCI read/write, maybe don't fall on i2c,isa or acpi
> bus.
> Yes, it should be easy to adapt to lm-sensors, all you need to do is
> move the code to a Linux kernel driver and add sysfs attributes to
> export the temperature to users-space.
> The fact that this is a PCI device isn't a problem at all, we already
> have several hwmon drivers for PCI devices: k8temp, sis5595, via686a,
> vt8231 and, I believe, i5k_amb.
> >       The code is here:
> >
> >
> http://www.coreboot.org/pipermail/coreboot/attachments/20081026/0f52e1e7/attachment-0001.gz
> >
> >       It's format is tar.gz
> A couple notes:
> * You make use of PCI_FILL_CLASS while as far as I can tell you don't
> need it. This prevents your tool from building with older pci header
> files so you may want to stop using it.
> * On my laptop with an ICH7, the tool reports "Your GPU temperature is
> under 40 degrees Centigrade". This laptop has an ATI Radeon graphics
> chip so the Intel IGP isn't used. So I am curious if the value returned
> by your tool is meaningful or not?
> * Note that the correct unit name is degree Celsius, not degree
> Centigrade.
> --
> Jean Delvare


Lu Zhihe
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