Re: [RFC] Change ECC algorithm from userspace

Javier Martinez Canillas
2011-10-28T11:14:17Z

On Fri, Oct 28, 2011 at 12:33 PM, Jon Povey <Jon.Povey@racelogic.co.uk> wrote:
> linux-mtd-bounces@lists.infradead.org wrote:
>> I want to be able to use 1-bit ECC for the first partition where I
>> save the loader binary and has to be accessed by the ROM boot but use
>> a 4-bit ECC for my rootfs partition.
>>
>> Does anyone have this same issue?
>
> DM355 and DM365 has similar issues as the RBL expects a different OOB/ECC
> layout to Linux.
>
>> What is the best approach to store data in a NAND device using
>> different ECC techniques?
>
> What I have done is write a utility that calculates ECC and writes to
> the mtd device in RAW mode. So to rewrite the bootloader I take care of
> the ECC and layout at application level without changing the kernel.
>

Hi Jon,

Thanks for your help. I see that both you and Matthieu use the same
approach so I guess that is the common workaround for this problem. I
will do the same.

Is your utility publicly available? It would be great if I can use it
as an starting point.

Thank you and best regards,

--
Javier Martínez Canillas
(+34) 682 39 81 69
Barcelona, Spain