On Friday 01 August 2003 19:29, Thomas Gleixner wrote:
> On Thursday 31 July 2003 20:55, J.D. Bakker wrote:
> > Hi all,
> >
> > I've just finished an MTD driver for a 1Gb Toshiba NAND Flash on a
> > LART expansion board. I want to use yaffs on the entire NAND, and was
> > wondering about the proper setting of some MTD options
> >
> > 1) Should my driver set this->eccmode to NAND_ECC_NONE or
> > NAND_ECC_SOFT ? I know yaffs does its own ECC, but MTD is quite ..
> > verbose in discouraging NAND_ECC_NONE.
>
> Set it to ECC_SOFT, as this switch tells the generic nand driver, which
> method of ECC to use. YAFFS supports the built in ECC generator in nand.c.
> There is some config switch in YAFFS, which enables this. YAFFS then just
> tells the nand driver, where in OOB to put / get ECC bytes.
> This is the preferred way.
>
> > 2) In a similar vein, should CONFIG_MTD_NAND_VERIFY_WRITE be set ?
>
> I think YAFFS can do it's own verify, but there should be a option to use
> the nand built in, as it will be faster to do so. Charles ???

YAFFS does verify itself, therefore no need to do this in MTD.



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