From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wproxy.gmail.com (wproxy.gmail.com [64.233.184.202]) by ozlabs.org (Postfix) with ESMTP id 8E95A67A67 for ; Sat, 12 Mar 2005 04:19:36 +1100 (EST) Received: by wproxy.gmail.com with SMTP id 71so1607127wra for ; Fri, 11 Mar 2005 09:19:34 -0800 (PST) Message-ID: Date: Fri, 11 Mar 2005 14:12:54 -0300 From: Sauro Salomoni To: Linux-Embedded Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Subject: MPC5200 clock manipulation Reply-To: Sauro Salomoni List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Good afternoon. I am using 2.4.25 denx Linux kernel in a MPC5200 custom board and I am looking for solutions to reduce power consumption. One possible solution is to reduce the frequencies using the CDM Registers. But then I have a problem: the MPC5200 User Manual states that the Power On Configuration Register is a read only register, then I can only configure it using straps and reseting the board. And the CDM Configurations Register, which controls IPB and PCI clocks, is already configured for low frequencies by default. Does anyone have a sugestion on how to reduce the frequencies (Fsystem and XLB) without the need of a reset? Maybe there is a way of configuring the clocks that I couldn't figure out. Thanks in advance -- Sauro Salomoni Engeneer Ztec Fone: +55 61 322-2544 FAX:+55 61 224-7171 www.ztec.com.br