From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-out.m-online.net (mail-out.m-online.net [212.18.0.9]) by ozlabs.org (Postfix) with ESMTP id 2BD3CDDF31 for ; Wed, 25 Apr 2007 23:59:33 +1000 (EST) Message-ID: <462F5F86.3060309@grandegger.com> Date: Wed, 25 Apr 2007 16:02:46 +0200 From: Wolfgang Grandegger MIME-Version: 1.0 To: Sergei Shtylyov Subject: Re: Flat device tree definitions for FLASH and MTD partitioning References: <4618D400.8050003@grandegger.com> <4618DBEF.30307@ru.mvista.com> <4618DE4A.4020404@ru.mvista.com> <462F4FD1.6080900@grandegger.com> <462F592F.7000409@ru.mvista.com> In-Reply-To: <462F592F.7000409@ru.mvista.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sergei Shtylyov wrote: > Hello. > > Wolfgang Grandegger wrote: > >>>>> are there already some thought or even example code on how to >>>>> define Flash memory and MTD partitions in the DTS. This would avoid >>>>> the ackward MTD partitioning via static structure or boot line >>>>> argument and could be done in a generic way. > >>>> See Documentation/powerpc/booting-without-of.txt and >>>> drivers/mtd/physmap_of.c for what's been already done. > >>> I meant drivers/mtd/maps/physmap_of.c > >> I had a closer look to this driver. Unfortunately, it can not handle >> yet multiple FLASH banks. This could be achieved with an additional >> property "bank_count". What do you think? > > I'm not sure what banks you're talking about -- note that this driver > is equivalen in functionality to the plain 'physmap' driver and there's > inherited "bank-width" property that handles flash banking. Yes, I know. Nevertheless the driver cannot handle flash regions composed of more than on FLASH bank because we need to probe every bank. Search for "BANK" in drivers/mtd/maps" to understand what I mean. Wolfgang.