linux-kernel - Re: [PATCH 1/1] cpufreq: eeepc 900 frequency scaling driver

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Date:	Tue, 2 Dec 2008 21:14:42 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Matthew Garrett <mjg@...hat.com>
Cc:	Cristiano Prisciandaro <cristiano.p@...net.ch>,
	Dave Jones <davej@...hat.com>, cpufreq@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] cpufreq: eeepc 900 frequency scaling driver

On Tue 2008-12-02 16:15:21, Matthew Garrett wrote:
> On Sun, Nov 23, 2008 at 07:04:09PM +0100, Pavel Machek wrote:
> 
> > Is this really needed? Could we simply talk to the cpu directly,
> > without help of ACPI?
> 
> No. The ACPI write ends up talking to the embedded controller and some 
> io ports.

Oops... I always knew that eee-s are broken by design (reporting
battery percent as mWh, etc...) but I did not realize how bad it
is. (ACPI has perfectly standard cpu frequency scaling interface, even
if it is not used too often these days....)

Sorry for the noise.
								Pavel

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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