linux-kernel - Re: [2.6 patch] #if 0 cpufreq.c:cpufreq

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Date:	Wed, 24 Oct 2007 18:17:52 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Adrian Bunk <bunk@...nel.org>, davej@...emonkey.org.uk,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, cpufreq@...ts.linux.org.uk
Subject: Re: [2.6 patch] #if 0 cpufreq.c:cpufreq_get()

On Wed, Oct 24, 2007 at 09:38:39AM -0700, Arjan van de Ven wrote:
> On Wed, 24 Oct 2007 18:23:12 +0200
> Adrian Bunk <bunk@...nel.org> wrote:
> 
> > cpufreq.c:cpufreq_get() no longer has any user.
> > 
> 
> it's... also a really bad/buggy interface... frquency is a per cpu
> property for one, and constantly changing (esp in a multi-core world)
> even depending on what other parts of the system are doing.

... and such an assumption which would make it impossible to use
the LCD controller on StrongARM-11x0 processors.

This is precisely why we have CPUFREQ - so that hardware which needs
to be re-timed when the CPU frequency changes can get notified of that
event and take the appropriate action.  It exists.  It works.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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