From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hunter Subject: Re: DT GPMC SRAM and NOR flash support ? Date: Tue, 5 Feb 2013 10:35:20 -0600 Message-ID: <511134C8.8000008@ti.com> References: <510BF3D3.3000304@mimc.co.uk> <510BF766.5090608@ti.com> <510C19FC.8090906@mimc.co.uk> <5111304C.7090706@mimc.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from comal.ext.ti.com ([198.47.26.152]:39323 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753986Ab3BEQf2 (ORCPT ); Tue, 5 Feb 2013 11:35:28 -0500 In-Reply-To: <5111304C.7090706@mimc.co.uk> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Mark Jackson Cc: "linux-omap@vger.kernel.org" , Afzal Mohammed On 02/05/2013 10:16 AM, Mark Jackson wrote: > 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. Sorry for the delay. I personally don't have anything in the pipe. Afzal, do you know of anyone looking at this? > 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 ? I am not familiar with mtd-physmap to comment. Is that DT specific? Cheers Jon