From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 30 Mar 2004 22:14:59 +0100 (BST) Received: from gateway-1237.mvista.com ([IPv6:::ffff:12.44.186.158]:27379 "EHLO av.mvista.com") by linux-mips.org with ESMTP id ; Tue, 30 Mar 2004 22:14:58 +0100 Received: from mvista.com (av [127.0.0.1]) by av.mvista.com (8.9.3/8.9.3) with ESMTP id NAA20757; Tue, 30 Mar 2004 13:14:53 -0800 Message-ID: <4069E34B.1080608@mvista.com> Date: Tue, 30 Mar 2004 13:14:51 -0800 From: Pete Popov User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Bob Lees CC: linux-mips@linux-mips.org Subject: Re: Frequency (cpu speed) control on AU1100 References: <200403302137.38123.bob@diamond.demon.co.uk> In-Reply-To: <200403302137.38123.bob@diamond.demon.co.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 4698 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ppopov@mvista.com Precedence: bulk X-list: linux-mips Bob Lees wrote: >Hi All > >I am working on an AU1100 board (Aurora) from DSP Design and want to control >the processor cpu speed, as in CPU_FREQ, type control. I suspect I am >missing something somewhere, but I can't find any references to cpu speed >control for the MIPS processors, specically the au1x range. > >Any clues? > > I assume you mean dynamically? Or at boot time only? There is an Au1x power management implementation that I haven't tested in a while. It allows you to scale the frequency using sysctl, if I remember correctly. Pete