Re: [ACPI] Metolious hardware-sensors-using-ACPI specs

[Pavel Machek <pavel@suse.cz>]

Hi!

> > But... Metolious sounds *needed*; how do you access voltage sensors
> > without metolious, in a way that can coexist with ACPI thermal
> > support?
> 
> (I think you mean thermal sensors)

No, I mean voltage sensors. They are on same smbus as thermal sensors,
yet their are not normally accessible using ACPI. I can talk to smbus
controller directly, but acpi may decide to read temperature while I'm
reading voltage, leading to armagedon.

How is that solved?

> A solution in search of a problem. I can say this because I helped define
> it. :)

Well, I thought that "simple" specs looks reasonable, I did not look
at "advanced" metolious. But it seemed sane (*).

> The machines that care about manageability (servers) appear to be entirely
> disjoint from the ones that have thermal zones (and, servers use IPMI),
> therefore thermal chip contention doesn't happen. And, Metolious required a
> fair amount of AML code.

I have seen desktop machine that can control CPU fan (altrough it is
slow/fast not on/off) and has thermal zone. It would be nice to be
able to check voltages in a safe way...
							Pavel

(*) comapred to ACPI2.0 ;-).
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