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From: Huang Shijie <b32955@freescale.com>
To: "Lothar Waßmann" <LW@KARO-electronics.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Brian Norris <computersforpeace@gmail.com>,
	Russell King <linux@arm.linux.org.uk>,
	Pawel Moll <pawel.moll@arm.com>, Arnd Bergmann <arnd@arndb.de>,
	Ian Campbell <ijc+devicetree@hellion.org.uk>,
	Artem Bityutskiy <artem.bityutskiy@linux.intel.com>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	devicetree@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
	linux-mtd@lists.infradead.org,
	Shawn Guo <shawn.guo@freescale.com>,
	Rob Landley <rob@landley.net>, Kumar Gala <galak@codeaurora.org>,
	Shawn Guo <shawn.guo@linaro.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Sascha Hauer <kernel@pengutronix.de>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCHv2 1/1] mtd: gpmi: make blockmark swapping optional
Date: Wed, 26 Mar 2014 18:41:43 +0800	[thread overview]
Message-ID: <5332AEE7.2040402@freescale.com> (raw)
In-Reply-To: <20140326095156.3e5585b8@ipc1.ka-ro>

于 2014年03月26日 16:51, Lothar Waßmann 写道:
> I don't see why this should not be supported on i.MX28 (i.MX23 doesn't
> do byteswapping anyway, so this wouldn't change anything for i.MX23).
> The partitions used by Linux need not necessarily be accessible for the
> Boot ROM code (and vice versa).
But the first partition used to store the u-boot is accessible for the ROM.

Please see "Figure 12-13" in the 12.12.1.12:
   "In order to preserve the BI (bad block information), flash updater 
or gang programmer
applications need to swap Bad Block Information (BI) data to byte 0 of 
metadata area for
every page before programming NAND Flash. ROM when loading firmware, 
copies back
the value at metadata[0] to BI offset in page data. The following figure 
shows how the
factory bad block marker is preserved."

So please the imx28 should _NOT_ support this feature.

thanks
Huang Shijie

  reply	other threads:[~2014-03-26 10:41 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-19 13:23 [PATCH] mtd: gpmi: make blockmark swapping optional y
2014-03-20  8:33 ` Juergen Beisert
2014-03-20  9:20   ` Lothar Waßmann
2014-03-20  9:15 ` Huang Shijie
2014-03-20  9:21   ` Lothar Waßmann
2014-03-20  9:47     ` Huang Shijie
2014-03-20 10:09       ` Lothar Waßmann
2014-03-20 10:56         ` Huang Shijie
2014-03-21  5:36 ` Huang Shijie
2014-03-21 10:50   ` [PATCHv2 1/1] " Lothar Waßmann
2014-03-24  9:59     ` Huang Shijie
2014-03-26  8:51       ` Lothar Waßmann
2014-03-26 10:41         ` Huang Shijie [this message]
2014-03-26 11:55           ` Lothar Waßmann
2014-03-27  9:59             ` Huang Shijie
2014-03-27 12:21               ` Lothar Waßmann
2014-03-28  2:09                 ` Huang Shijie
2014-03-28  8:16                   ` Lothar Waßmann
2014-03-28  8:39                     ` Huang Shijie
2014-03-28  9:00                       ` Sascha Hauer
2014-03-28  9:26                         ` Huang Shijie
2014-03-28  9:31                           ` Lothar Waßmann
2014-03-28 10:09                             ` Huang Shijie
2014-03-28 10:18                               ` Lothar Waßmann
2014-03-28  9:01                       ` Lothar Waßmann
2014-03-28  9:33                         ` Huang Shijie
2014-03-28  9:38                           ` Huang Shijie
2014-03-28 10:13                             ` Lothar Waßmann
2014-03-28 10:35 ` [PATCHv3 0/2] " Lothar Waßmann
2014-03-28 10:35   ` [PATCHv3 1/2] " Lothar Waßmann
2014-03-31  2:06     ` Huang Shijie
2014-03-28 10:35   ` [PATCHv3 2/2] of/mtd/nand: add generic binding and helper for NAND_BBT_NO_OOB_BBM Lothar Waßmann

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