Re: [PATCH] mtd/gpmi : add BBT support

Marek Vasut
2012-01-30T12:27:41Z

> CCing Marek, he can say more about the U-Boot side probably...

Thanks!

>
> > > Bootloaders may also need to write to NAND. So, they need to share the
> >
> > Do you mean the uboot may write something to the NAND?
> > Could you show me some more detail cases?
>
> U-Boot has NAND support in mainline, for barebox it is work-in-progress.

Why don't you rather start hacking on u-boot instead of chasing behind it all
the time ;-)

> Both can and do write to NAND (kernel, rootfs), because both have
> established procedures to do so (and maybe don't want to rely on
> third-party tools like kobs-ng).

I think the FSL U-Boot can write stuff to NAND too. You can give that a shot
too.
>
> > > share the same information then. To be on the safe side regardings
> >
> > The kobs-ng which burns the bootloader to the NAND will also burn the
> > whole BBT
> > to the NAND too.
>
> Did it always do that? Or is a newer version needed?

I can't comment on this one, I never used it. I rather got NAND working
properly.

>
> > But if the bootloader can make some block bad, the BBT information
> > becomes different.
> > Does the bootloader have the feature to make some block bad?
>
> Sure. If you are able to write NAND, you should be able to mark blocks
> bad, too :)

Not really, but you prefer to do so ;-)

Thanks!

M
>
> Thanks,
>
> Wolfram