Re: [PATCH 79/79] hwmon: (it87) Fix vrm value range

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On Tue, 24 Jan 2012 10:47:00 -0800, Guenter Roeck wrote:
> On Tue, 2012-01-24 at 10:11 -0500, Guenter Roeck wrote:
> > After looking into it a bit more, I think we should move the vrm attributes
> > to hwmon-vid (and fix hwmon-vid).
> 
> Looked into this a bit. I have a list of CPU models, but how do I find
> out which Intel CPU model supports which VRM version ?

You have to check the datasheet of every CPU model (or family of
models) separately. For example, you can get the datasheet for Pentium
III from:
http://www.intel.com/design/pentiumiii/datashts/244452.htm

Then search the document for "VRM", and you'll come to the conclusion
that it uses VRM 8.4 (which is already supported by hwmon-vid.)

I'm not sure what you're trying to fix exactly, BTW. The problem I did
identify is for Intel CPU family 6, models < 0x9. These are currently
covered by a generic entry in vrm_models[]:

	{X86_VENDOR_INTEL, 0x6, ANY, ANY, 82},		/* any P6 */

and this should be changed to explicit entries instead, so that the
generic entry can be removed. But I don't know which of these model
numbers were actually used (nor what model names they correspond to.)
Well, according to the datasheet above, models 7 and 8 are for the Slot
1 version of the Pentium III, but for lower model numbers some research
will be needed.

-- 
Jean Delvare

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