From mboxrd@z Thu Jan 1 00:00:00 1970 From: Edward Falk Subject: Features vs versions (Was: Patch: eMMC boot partition needs to be deactivated for linux to find user partitions) Date: Mon, 15 Mar 2010 11:32:45 -0700 Message-ID: <4B9E7D4D.1030807@efalk.org> References: <43E4817426ED174AA81263BCECB4351D131745CF98@sc-vexch3.marvell.com> <53E1B390-48DD-4E33-B51F-1B039AFD13A2@marvell.com> <4B9DEAE2.3030707@nokia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from a.mail.sonic.net ([64.142.16.245]:57791 "EHLO a.mail.sonic.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932739Ab0COSqv (ORCPT ); Mon, 15 Mar 2010 14:46:51 -0400 Received: from peregrine.palm1.palmone.com (palm-64-28-152-131.palm.com [64.28.152.131]) (authenticated bits=0) by a.mail.sonic.net (8.13.8.Beta0-Sonic/8.13.7) with ESMTP id o2FIWjaa030722 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 15 Mar 2010 11:32:46 -0700 In-Reply-To: <4B9DEAE2.3030707@nokia.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: "linux-mmc@vger.kernel.org" Adrian Hunter wrote: > That switch command should not be used for devices that do not > support it e.g. eMMC 4.3 and before. I've been wondering about this -- how can you tell which feature is available in which version of the standard? I have 84-A44 in front of me now, and I can't see it. Do I need to just obtain older versions of the standards doc and compare them by hand? -ed falk