Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758058AbZFWJXm (ORCPT ); Tue, 23 Jun 2009 05:23:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752048AbZFWJXe (ORCPT ); Tue, 23 Jun 2009 05:23:34 -0400 Received: from mail-fx0-f213.google.com ([209.85.220.213]:45672 "EHLO mail-fx0-f213.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751857AbZFWJXd (ORCPT ); Tue, 23 Jun 2009 05:23:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=D7eRCcfmXWJBRRnswzinvW7xXol1SvGWezH77hHQQ+w5J/yjaQXbTvx28mVkh8RmBl 6BT7HFCL3k5F4vaFMbTAQKlh2+aUKM6FOP2fZd367+kNf8FWwx5MbkwQ3/mx4EZ+kqe/ Am3xqJcTxgE2axTjt/7a81em5hytemW4Rpf5A= MIME-Version: 1.0 In-Reply-To: <20090622164604.GG29188@n2100.arm.linux.org.uk> References: <366f00c80906180218p539f9df9md30f629787fabeb2@mail.gmail.com> <20090619134446.GI24573@n2100.arm.linux.org.uk> <366f00c80906220713o7ad61a8elb6b278b7313107d8@mail.gmail.com> <20090622154308.GC29188@n2100.arm.linux.org.uk> <1245685846.15580.107.camel@pc1117.cambridge.arm.com> <20090622155659.GE29188@n2100.arm.linux.org.uk> <1245687196.15580.122.camel@pc1117.cambridge.arm.com> <20090622164604.GG29188@n2100.arm.linux.org.uk> Date: Tue, 23 Jun 2009 11:23:35 +0200 Message-ID: <63386a3d0906230223v66564c5bh613d05a0defb8c35@mail.gmail.com> Subject: Re: Rootfs in eMMC: Kernel panic ...Attempted to kill init! From: Linus Walleij To: Russell King - ARM Linux , Pierre Ossman Cc: Catalin Marinas , Sudeep K N , linux-arm-kernel@lists.arm.linux.org.uk, drzeus-mmc@drzeus.cx, linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 953 Lines: 27 2009/6/22 Russell King - ARM Linux : > If I knew what this "eMMC" was... It's to be read out "embedded MultiMediaCard", comes from JEDEC but is based on the standard from MMCA. Just as it says, it's like an MMC card you embed. It uses lower voltages than MMC and thus save some power. It doesn't look like an MMC card either, it comes in a standardized solder-on BGA package so it looks like any chip, no expensive card holders. It uses 8bit wide transfers giving a total of 10 pins for the bus. (Plus voltage of course.) But usually you reuse a standard MMC hardware IP to talk to it. Here is some whitepaper: http://www.jedec.org/download/search/JESD84-C43.pdf Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/