From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933339AbZHVTf1 (ORCPT ); Sat, 22 Aug 2009 15:35:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933312AbZHVTf0 (ORCPT ); Sat, 22 Aug 2009 15:35:26 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:44335 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933309AbZHVTf0 (ORCPT ); Sat, 22 Aug 2009 15:35:26 -0400 Date: Sat, 22 Aug 2009 21:35:15 +0200 From: Pavel Machek To: Mark Brown Cc: Felipe Balbi , Liam Girdwood , Mike Rapoport , linux-kernel@vger.kernel.org Subject: Re: Smart Battery System Design (was: Re: Question about userspace-consumer) Message-ID: <20090822193515.GA15488@elf.ucw.cz> References: <20090811204914.GB13969@gandalf> <20090811223645.GA4691@sirena.org.uk> <20090814163201.GB1626@ucw.cz> <20090815164324.GA4252@sirena.org.uk> <20090815223434.GB27637@elf.ucw.cz> <20090816091858.GB12567@sirena.org.uk> <20090822092845.GE11448@elf.ucw.cz> <20090822101641.GC4344@sirena.org.uk> <20090821140126.GA1328@ucw.cz> <20090822141646.GA5812@sirena.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090822141646.GA5812@sirena.org.uk> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > > Like you say this is a very old design but even there I'm fairly > > > surprised it's causing issues when charging from a wall supply. If > > > you're charging from USB then there is obviously a constraint on the > > > power draw but normally a modern system has sufficiently low power draw > > > when idle that it's not actually a big deal - runtime power management > > > facilities have improved greatly. > > > Well... all the hardware I have here (zaurus, openmoko, htc dream) has > > issues with power consumption while charging... so I do not think > > runtime pm is solved problem. > > The Zaurus and OpenMoko aren't exactly modern designs. The Dream does > surprise me, though. I can't find any references to issues with this - > any pointers? If the phone were actually in use I'd expect it to have > trouble charging off USB but sitting idle it's a lot more surprising, > especially running Android. Well, I'd like the older designs to work well too. (Actually, the Dream... was on wifi when I got bad problems charging it from usb.... so maybe charging while suspended would not help there). Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html