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Re: [PATCH v1 3/3] [loongson] 2f: add CPUFreq support

To: Wu Zhangjin <wuzhangjin@gmail.com>
Subject: Re: [PATCH v1 3/3] [loongson] 2f: add CPUFreq support
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 17 Nov 2009 14:10:59 +0100
Cc: linux-mips@linux-mips.org, cpufreq@vger.kernel.org, Dave Jones <davej@redhat.com>, Dominik Brodowski <linux@dominikbrodowski.net>, yanh@lemote.com, huhb@lemote.com
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References: <cover.1258392631.git.wuzhangjin@gmail.com> <098db5f99a601ad0f5853e7ca0a66200f351a86b.1258392631.git.wuzhangjin@gmail.com>
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On Tue, Nov 17, 2009 at 01:32:59AM +0800, Wu Zhangjin wrote:

> Subject: [PATCH v1 3/3] [loongson] 2f: add CPUFreq support
> 
> Loongson2f add a new capability to dynamicly scale cpu frequency. And
> when we put it into wait mode via setting the frequency as ZERO, it will
> wait there until an external interrupt take place, which will help
> saving power for us.
> 
> And as the last patch described, to enable this support, an external
> timer is needed to avoid getting wrong system time when using the MIPS
> Timer, 'Cause the MIPS Timer's frequency is half of the cpu frequency,
> when the cpu frequency is changed, the MIPS Timer will be not accuracy.
> 
> This version incorporates the feedback from "Dominik Brodowski
> <linux@dominikbrodowski.net>" to register transition notifier before
> register_driver().

Thanks, queue for 2.6.33.

  Ralf

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