From mboxrd@z Thu Jan  1 00:00:00 1970
From: LW@KARO-electronics.de (Lothar =?UTF-8?B?V2HDn21hbm4=?=)
Date: Thu, 20 Mar 2014 11:09:14 +0100
Subject: [PATCH] mtd: gpmi: make blockmark swapping optional
In-Reply-To: <532AB94D.1050406@freescale.com>
References: <1395235406-13449-1-git-send-email-y>
 <532AB1A2.9010702@freescale.com>
 <20140320102153.7106f915@ipc1.ka-ro>
 <532AB94D.1050406@freescale.com>
Message-ID: <20140320110914.731db7cf@ipc1.ka-ro>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi,

Huang Shijie wrote:
> ? 2014?03?20? 17:21, Lothar Wa?mann ??:
> > Hi,
> >
> > Huang Shijie wrote:
> >> ? 2014?03?19? 21:23, y at karo-electronics.de ??:
> >>> configurable via DT. This is required for the Ka-Ro electronics
> >>> platforms.
> >>>
> >> If you disable the swapping, you will disable the NAND boot in actually.
> >>
> > 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 
> kobs-ng (or something else?).
> 
This can be disabled by parameter in the FCB (at least according to
the i.MX6 reference Manual):
|DISBBM 172 4 If 0 ROM will swap BadBlockMarkerByte with
|             metadata[0] after reading a page using BCH40.
|             If the value set is 1 then ROM will not do
|             swapping


Lothar Wa?mann
-- 
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Ka-Ro electronics GmbH | Pascalstra?e 22 | D - 52076 Aachen
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