From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Jackson Subject: Re: DT GPMC SRAM and NOR flash support ? Date: Tue, 05 Feb 2013 16:16:12 +0000 Message-ID: <5111304C.7090706@mimc.co.uk> References: <510BF3D3.3000304@mimc.co.uk> <510BF766.5090608@ti.com> <510C19FC.8090906@mimc.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mercuryimc.plus.com ([80.229.200.144]:37086 "EHLO centos1.newflow.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754248Ab3BEQQN (ORCPT ); Tue, 5 Feb 2013 11:16:13 -0500 In-Reply-To: <510C19FC.8090906@mimc.co.uk> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Jon Hunter Cc: "linux-omap@vger.kernel.org" On 01/02/13 19:39, Mark Jackson wrote: > On 01/02/13 17:12, Jon Hunter wrote: >> Hi Mark, >> >> On 02/01/2013 10:56 AM, Mark Jackson wrote: >>> There's plenty of DT support going in for NAND flash, but is there any work going on to support NOR >>> flash ? >> >> What board and device are you working that is using NOR? I have a >> OMAP2420 H4 with NOR that I have been doing a bit of maintenance for but >> I don't spend much time on it. Eventually it will have to be done but it >> is always good to know if there is a pressing need. > > We have a custom AM335x CPU board (arriving on my desk within the next few weeks) that has both NAND > and NOR Flash. > >>> And how about SRAM chips or other memory mapped devices ? >> >> Not sure about SRAM (trying to think if I have a board with SRAM even), >> but definitely, boards using the GPMC to interface to ethernet chips >> need to be added. > > The board also contains an FRAM chip (which is just treated as SRAM). > > If you'd anything in the pipeline, I'm glad to help in any testing. I've created a custom cape board > for the BeagleBone which contains the NOR flash and FRAM chips, so I'm not waiting for the new > hardware to arrive. I've experimented with trying to add a mtd-physmap device, but no joy. I'm guessing that the current mtd-physmap code is (in some way) currently incompatible with the GPMC device ? Mark J.