From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huang Shijie Subject: Re: [PATCH] mtd: gpmi: make blockmark swapping optional Date: Thu, 20 Mar 2014 17:47:57 +0800 Message-ID: <532AB94D.1050406@freescale.com> References: <1395235406-13449-1-git-send-email-y> <532AB1A2.9010702@freescale.com> <20140320102153.7106f915@ipc1.ka-ro> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20140320102153.7106f915@ipc1.ka-ro> Sender: linux-kernel-owner@vger.kernel.org To: =?UTF-8?B?TG90aGFyIFdhw59tYW5u?= Cc: y@KARO-electronics.de, Arnd Bergmann , Artem Bityutskiy , Brian Norris , David Woodhouse , Fabio Estevam , Ian Campbell , Kumar Gala , Mark Rutland , Pawel Moll , Rob Herring , Rob Landley , Russell King , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, b47714@freescale.com List-Id: devicetree@vger.kernel.org =E4=BA=8E 2014=E5=B9=B403=E6=9C=8820=E6=97=A5 17:21, Lothar Wa=C3=9Fman= n =E5=86=99=E9=81=93: > Hi, > > Huang Shijie wrote: >> =E4=BA=8E 2014=E5=B9=B403=E6=9C=8819=E6=97=A5 21:23, y@karo-electron= ics.de =E5=86=99=E9=81=93: >>> configurable via DT. This is required for the Ka-Ro electronics >>> platforms. >>> >> If you disable the swapping, you will disable the NAND boot in actua= lly. >> > No. All our modules do boot from NAND and none of them does the > swapping. > > It seems the NAND boot runs well by luck. The ROM will do the swapping when it reads the BBT table written by the= =20 kobs-ng (or something else?). If the BBT table is small, not bigger then a page, the NAND boot may=20 runs well when you disable the swapping; But it the BBT table is bigger, the ROM will get a corrupted BBT table. thanks Huang Shijie