From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Subject: Re: Power managment on Overo Date: Thu, 15 Jul 2010 05:29:42 -0500 Message-ID: <4C3EE316.5000506@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-yx0-f174.google.com ([209.85.213.174]:50521 "EHLO mail-yx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933031Ab0GOK3z (ORCPT ); Thu, 15 Jul 2010 06:29:55 -0400 Received: by yxn35 with SMTP id 35so18608yxn.19 for ; Thu, 15 Jul 2010 03:29:54 -0700 (PDT) In-Reply-To: Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Han Wang Cc: linux-omap@vger.kernel.org On 07/15/2010 12:00 AM, Han Wang wrote: > Hi, All, > > I am running the linux-pm-kernel v2.35.rc3 on Overo Earth. I have managed to > suspend the system using "echo mem> /sys/power/state" with "enable_off_mode" > and "sleep_while_idle" enabled. Currently, I am able to achieve 200mW in suspend > mode. However, I am seen in other posts, such as this one (http://old.nabble.com/ > Overo-boot-time--power-management-ts28402656.html#a28463135), that > people are able to achieve a much lower power signature. Did you check if you have actually shut off the voltages on vdd1 and vdd2 when you hit OFF? easy to check with a voltmeter/scope on vdd1&vdd2 capcacitors. > > I am particularly interested to know what mode has the SDRAM on Overo been set to > during suspend mode? Is it auto-refresh or self-refresh? And whether the TPS/TWL > power management chip is set to low power mode during suspend mode by the pm > kernel, if not, how to set it? > > Thanks, > Han > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >