From: Pavel Machek <pavel@suse.cz>
To: Matthew Garrett <mjg@redhat.com>
Cc: Cristiano Prisciandaro <cristiano.p@solnet.ch>,
Dave Jones <davej@redhat.com>,
cpufreq@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] cpufreq: eeepc 900 frequency scaling driver
Date: Tue, 2 Dec 2008 21:14:42 +0100 [thread overview]
Message-ID: <20081202201442.GA1504@ucw.cz> (raw)
In-Reply-To: <20081202161520.GA18252@srcf.ucam.org>
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
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2008-12-02 20:15 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-23 15:27 [PATCH 1/1] cpufreq: eeepc 900 frequency scaling driver Cristiano Prisciandaro
2008-11-23 18:04 ` Pavel Machek
2008-12-02 16:15 ` Matthew Garrett
2008-12-02 20:14 ` Pavel Machek [this message]
2009-03-16 4:24 ` Len Brown
2009-03-16 8:29 ` Pavel Machek
2009-03-17 8:30 ` Fabio Comolli
2009-03-17 8:59 ` Fabio Comolli
2008-11-24 9:38 ` Tom Hughes
2008-11-24 15:13 ` Thomas Renninger
2008-11-24 16:36 ` Thomas Renninger
2008-11-24 16:41 ` [Acpi4asus-user] " Corentin Chary
2008-11-24 16:48 ` Tom Hughes
2008-11-24 16:58 ` Corentin Chary
2008-11-24 17:07 ` Tom Hughes
2008-11-24 16:46 ` Tom Hughes
2008-11-24 23:02 ` Cristiano Prisciandaro
2009-04-05 7:43 ` [Acpi4asus-user] " Corentin Chary
2009-04-05 7:43 ` Corentin Chary
2009-04-05 10:20 ` Matthew Garrett
2009-04-05 11:39 ` Grigori Goronzy
2008-11-24 16:39 ` Tom Hughes
2008-11-24 19:09 ` Cristiano Prisciandaro
2008-12-03 19:26 ` Tom Hughes
2008-12-04 1:57 ` Thomas Renninger
2008-12-05 23:05 ` Tom Hughes
2008-12-06 16:35 ` Matthew Garrett
2008-12-07 15:55 ` Tom Hughes
2008-12-09 12:36 ` Pavel Machek
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