Messages in this thread | | | Date | Tue, 30 Sep 2014 10:04:15 +0200 | From | Boris Brezillon <> | Subject | Re: [PATCH] mtd: nand: gpmi: add proper raw access support |
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Hi Iwo,
On Mon, 29 Sep 2014 11:22:11 +1000 Iwo Mergler <Iwo.Mergler@netcommwireless.com> wrote:
> On Thu, 11 Sep 2014 22:36:16 +1000 > Boris BREZILLON <boris.brezillon@free-electrons.com> 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.
Okay. Anyway, the test I'm really interested in is the incremental bit errors test :-).
BTW, any reason you chose to implement this test/testsuite as a module ? From my understanding (and tell me if I'm wrong) we could do the same from user-space.
Best Regards,
Boris
-- Boris Brezillon, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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