[U-Boot-Users] [PATCH 1/2] NAND: Add support for transparent hardware ECC.

Stefan Roese sr at denx.de
Thu May 24 12:26:25 CEST 2007

Hi Scott,

sorry for the late response.

On Wednesday 16 May 2007, Scott Wood wrote:
> Some NAND controllers (such as on the MPC831x chips) have hardware ECC,
> but can only do it during a transfer (i.e. we can't implement
> calculate_ecc()).  When NAND_ECC_TRANSPARENT is used, then ECC errors on
> reads are reported through correct_data() (with no arguments other than
> the mtd device), and on writes through waitfunc()'s return value.

I would like to know the status of this "tranparent" hardware ECC mechanism
in the Linux source. I assume that you want to integrate this support there
too, right? I couldn't find any reference to this in the current mtd/nand
implementations and/or any reference to the MPC831x.

I'm asking, since the U-Boot nand code is based on the Linux mtd codebase,
and we should try to keep features common between both source codes as
often as possible.


Best regards,

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

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