[U-Boot] [PATCH] mxs_nand: Fix ECC strength for NAND flash with OOB size of 256

[Marek Vasut]

On Monday, April 13, 2015 at 10:39:46 AM, Jörg Krause wrote:
> Hi Heiko,
> 
> On So, 2015-04-12 at 10:17 +0200, Heiko Schocher wrote:
> > On the i.mx6 based aristainetos2 board a Toshiba TH58NYG3S0HBAI4
> > is used, which has 4096 pagesize and 256b oob. The ECC strength
> > was not correct detected by U-Boot
> > 
> > Signed-off-by: Heiko Schocher <hs at denx.de>
> > ---
> > 
> >  drivers/mtd/nand/mxs_nand.c | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/drivers/mtd/nand/mxs_nand.c
> > b/drivers/mtd/nand/mxs_nand.c
> > index 2d2b938..00bf036 100644
> > --- a/drivers/mtd/nand/mxs_nand.c
> > +++ b/drivers/mtd/nand/mxs_nand.c
> > @@ -163,6 +163,9 @@ static inline uint32_t
> > mxs_nand_get_ecc_strength(uint32_t page_data_size,
> > 
> >               if (page_oob_size == 224)
> >               
> >                       return 16;
> > 
> > +
> > +             if (page_oob_size == 256)
> > +                     return 18;
> > 
> >       }
> >       
> >       return 0;
> 
> How about calculation the ECC strength dynamically? Peng Fan from
> Freescale send a patch doing this in December 2014 which was already
> reviewed by Marek:
> https://patchwork.ozlabs.org/patch/422756/
> 
> It is also necessary to change the calculation in mxsboot...

Would be nice if the patch got applied, but I think there were some
comments and the patch was never fixed/reposted. If Heiko wants to
do it, that'd be nice.

Nice domain name btw ;-)

Best regards,
Marek Vasut