From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Ball Subject: Re: [PATCH 5/5] SDIO: put active devices into 1-bit mode during suspend Date: Wed, 10 Feb 2010 11:32:23 -0500 Message-ID: References: <1265747366-6676-1-git-send-email-nico@fluxnic.net> <1265747366-6676-6-git-send-email-nico@fluxnic.net> <4B7298EF.4070604@csr.com> <4B72D8CC.9030605@csr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from void.printf.net ([89.145.121.20]:45749 "EHLO void.printf.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755540Ab0BJQeZ (ORCPT ); Wed, 10 Feb 2010 11:34:25 -0500 In-Reply-To: <4B72D8CC.9030605@csr.com> (David Vrabel's message of "Wed, 10 Feb 2010 16:03:24 +0000") Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: David Vrabel Cc: Nicolas Pitre , Andrew Morton , linux-mmc@vger.kernel.org Hi David, > I couldn't find anything in the SDIO specification (you know the > section number?). Part A2 has a requirement that the controller > be placed into 1-bit mode but this doesn't mean that the card has > to be. I think it's part E1 section 8, and does specify that it's necessary for both host and card. > Maybe it's not really a big deal, a single command only costs a > few 10s of microseconds anyway. Yeah, and it's only being sent on a powered-suspend, which so far OLPC is the only user of -- I'd rather have the next user tell us it isn't necessary than break it for them by introducing an incorrect quirk. Thanks, - Chris. -- Chris Ball One Laptop Per Child