From: Tony Lindgren <tony@atomide.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: linux-kernel@vger.kernel.org, davej@redhat.com
Subject: Re: [PATCH] powernow-k8 max speed sanity check
Date: Fri, 6 Feb 2004 09:28:16 -0800 [thread overview]
Message-ID: <20040206172815.GB8222@atomide.com> (raw)
In-Reply-To: <20040206125623.GC22597@atrey.karlin.mff.cuni.cz>
* Pavel Machek <pavel@ucw.cz> [040206 04:57]:
>
> > But I meant calculating all the valid values inbetween min and max without
> > relying on getting those values from the BIOS.
>
> I do not think values can be calculated by some simple
> formula. voltage/frequency relations may be quite complex..
>
> > I guess the code already does that to figure out how many steps are needed
> > to change between min and max?
>
> Well, but it steps voltage first, then frequency [going up] or
> frequency first, voltage then [going down]; middle values used by the
> transitions are not too good if you want to be power-efficient.
OK, I see. Then your idea of using a lookup table for blacklisted BIOSes
makes good sense.
Tony
prev parent reply other threads:[~2004-02-06 17:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-31 20:35 [PATCH] powernow-k8 max speed sanity check Tony Lindgren
2004-01-31 23:19 ` Dave Jones
2004-02-03 13:14 ` Pavel Machek
2004-02-05 18:17 ` Tony Lindgren
2004-02-05 18:48 ` Pavel Machek
2004-02-05 19:36 ` Tony Lindgren
2004-02-05 21:33 ` Tony Lindgren
2004-02-05 21:38 ` Pavel Machek
2004-02-05 21:56 ` Tony Lindgren
2004-02-06 0:28 ` Pavel Machek
2004-02-06 1:15 ` Tony Lindgren
2004-02-06 12:56 ` Pavel Machek
2004-02-06 17:28 ` Tony Lindgren [this message]
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