RE: [PATCH] mtd: nand: gpmi: add proper raw access support

From: Iwo Mergler
Date: Sun Sep 28 2014 - 21:30:09 EST

On Thu, 11 Sep 2014 22:36:16 +1000
Boris BREZILLON <boris.brezillon@xxxxxxxxxxxxxxxxxx> wrote:
> Well, I don't know about freescale specific tools, but at least I have
> an example with mtd_nandbiterrs module.
> This module is assuming it can write only the data part of a NAND page
> without modifying the OOB area (see [1]), which in GPMI controller
> case is impossible because raw write function store the data as if
> there were no specific scheme, while there is one:
> (metadata + n x (data_chunk + ECC bytes) + remaining_bytes).

Hi Boris,

just as an aside, only the incremental bit errors test in nandbiterrs
positively requires raw data write.

The overwrite test (re-write the same page data repeatedly without
erase), only uses raw access because I was lazy. A normal ECC write
would do just as well.

Best regards,


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