From: Nicolas Ferre <nicolas.ferre@atmel.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] AT91: NAND OOB and ECC in U-Boot vs Linux
Date: Wed, 18 Mar 2009 14:45:32 +0000 (UTC) [thread overview]
Message-ID: <loom.20090318T144302-111@post.gmane.org> (raw)
In-Reply-To: 06c701c9a773$12112180$36336480$@com
Jesus Alvarez <jalvarez <at> micromint.com> writes:
>
> The AT91 Linux kernel patches for versions 2.6.27 or later use a separate
> atmel_nand.c driver that implements some OOB and ECC options that are not
> exactly the same as those in the standard kernel NAND driver (nand_base.c ,
> etc.). AT91 based boards can use the CONFIG_MTD_NAND_ATMEL option to enable
> the atmel_nand driver together with CONFIG_MTD_NAND_ATMEL_ECC_HW,
> CONFIG_MTD_NAND_ATMEL_ECC_SOFT or CONFIG_MTD_NAND_ATMEL_ECC_NONE for the
> desired ECC. The OOB layout used by that driver appears to be different.
CONFIG_MTD_NAND_ATMEL_ECC_SOFT is fully compatible with u-boot management of
NAND flash.
Indeed CONFIG_MTD_NAND_ATMEL_ECC_HW uses a different layout of OOB (ecc just
after data, at bad block notification location). If you use this option in
Linux, you will have to make sure that u-boot supports it.
Regards,
prev parent reply other threads:[~2009-03-18 14:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-18 2:41 [U-Boot] AT91: NAND OOB and ECC in U-Boot vs Linux Jesus Alvarez
2009-03-18 10:38 ` Jean-Christophe PLAGNIOL-VILLARD
2009-03-18 12:39 ` Jesus Alvarez
2009-03-18 14:45 ` Nicolas Ferre [this message]
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