Re: [PATCHv2 1/1] mtd: gpmi: make blockmark swapping optional

[Sascha Hauer]

On Fri, Mar 28, 2014 at 04:39:00PM +0800, Huang Shijie wrote:
> ä 2014å03æ28æ 16:16, Lothar WaÃmann åé:
> >Still there is no need for the Linux NAND driver to be able to read or
> >write partitions in a format that the Boot ROM can understand. Thus it
> If you do not use the NAND boot, there really no need to do so.
> 
> Since you need the NAND boot, we should enable the swapping for imx28.
> >is perfectly legal to allow disregarding the BB marks and solely rely on
> >a flash based BBT.
> >
> The BB mark is in the page 0 of a NAND block. But the swapping can
> occur in _each_ page of
> a NAND block, _NOT_ only the page 0.
> 
> I think you are confusing at these two things.

I think you are confusing two things. If Lothar:

- disables swapping of BB marks in the FCB the ROM won't swap bytes.
- writes data without swapping
- Uses a DBBT for telling the ROM code where bad blocks are
- uses a Flash BBT for mtd

Then everything should work just fine.

Sascha

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/