linux-kernel - Re: [lm-sensors] Could the k8temp driver be interfering with ACPI?

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Date:	Wed, 18 Apr 2007 01:50:29 +0200
From:	"Luca Tettamanti" <kronos.it@...il.com>
To:	"Bjorn Helgaas" <bjorn.helgaas@...com>
Cc:	"Jean Delvare" <khali@...ux-fr.org>, "Pavel Machek" <pavel@....cz>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	lm-sensors@...sensors.org, linux-acpi@...r.kernel.org,
	"Chuck Ebbert" <cebbert@...hat.com>
Subject: Re: [lm-sensors] Could the k8temp driver be interfering with ACPI?

On 4/17/07, Bjorn Helgaas <bjorn.helgaas@...com> wrote:
> On Monday 16 April 2007 15:14, Luca Tettamanti wrote:
> > Problem is that ACPI methods are not documented at all (how am I
> > supposed to know that "G6T6" is the reading of the 12V rail?) while the
> > datasheet of hw monitoring chips (w83627ehf in my case) are public (more
> > or less).
>
> Yes, I see that it's attractive to use a single w83627ehf.c driver.
> For an ACPI driver, we'd have to build a list of PNP IDs, and possibly
> information about which methods read which information.  That's
> certainly more work.
>
> On the other hand, the ACPI driver would avoid the synchronization
> issues that started this whole thread.  That's a pretty compelling
> advantage.
>
> > Furthermore, sensor driver exposes all the reading of the chip
> > (e.g. in the DSDT I can't find the VSB or battery voltage).
>
> Maybe Asus didn't hook up those readings on the board.  I would
> guess that PC Probe doesn't expose the VSB or battery voltage either.

PC Probe does not. But the lines are wired and the readings (from
Linux) are sensible.

> I'm sure you've seen these:
>   http://lists.lm-sensors.org/pipermail/lm-sensors/2005-October/014050.html
>   http://www.lm-sensors.org/wiki/AsusFormulaHacking

Actually I haven't, I've happily ignored ACPI until now ;-) My DSDT
doesn't look too bad, I may give it a try...

Luca
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