From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Hans J. Koch" Subject: Re: Is anyone working on SD/MMC driver for i.MX35 ? Date: Tue, 6 Apr 2010 11:12:21 +0200 Message-ID: <20100406091220.GA2036@bluebox.local> References: <20100401125739.GE2045@bluebox.local> <20100401132017.GA30804@buzzloop.caiaq.de> <20100401132234.GG2045@bluebox.local> <20100402012932.GE13989@pengutronix.de> <20100405182103.GB3316@oksana.dev.rtsoft.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from www.tglx.de ([62.245.132.106]:36494 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751455Ab0DFJMi (ORCPT ); Tue, 6 Apr 2010 05:12:38 -0400 Content-Disposition: inline In-Reply-To: <20100405182103.GB3316@oksana.dev.rtsoft.ru> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Anton Vorontsov Cc: Wolfram Sang , "Hans J. Koch" , linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Daniel Mack , John Ogness On Mon, Apr 05, 2010 at 10:21:03PM +0400, Anton Vorontsov wrote: > On Fri, Apr 02, 2010 at 03:29:32AM +0200, Wolfram Sang wrote: > > On Thu, Apr 01, 2010 at 03:22:35PM +0200, Hans J. Koch wrote: > > > On Thu, Apr 01, 2010 at 03:20:17PM +0200, Daniel Mack wrote: > > > > On Thu, Apr 01, 2010 at 02:57:40PM +0200, Hans J. Koch wrote: > > > > > I need to get the MMC interface of an i.MX35 to work in the near future. > > > > > To avoid duplicate work, I'd like to know if anybody already started > > > > > work on this. > > > > > > > > Is the controller very different from the one which is already supported > > > > for MX31? > > > > > > Yep. Completely different beast. Unfortunately. > > > > (CCing linux-mmc) > > > > And it is a mess, really :( > > > > The kernel already has an esdhc-driver (and Anton already worked around a > > number of hardware-bugs), but is tied into an of-driver because the core was > > also used on PowerPC. There, it utilizes a 32-bit-byte-swaper which is not > > needed on ARM. So, one has to rip all that out, generalize the sdhc-platform > > support (possibly also abstract the quirk support) and make sure nothing > > breaks. > > FYI, there is sdhci-pltfm driver, + some patches to add > quirks support: > > http://lkml.org/lkml/2010/3/16/337 > > These patches are already in the -mm tree. Thanks a lot for all your hints! Will have a deeper look at that. Thanks, Hans