Re: [PATCH] MTD: NAND: fsl_elbc_nand: implement support for flash-based BBT

Anton Vorontsov
2008-06-27T19:02:45Z

On Fri, Jun 27, 2008 at 11:29:36AM -0500, Scott Wood wrote:
> Anton Vorontsov wrote:
>> On Fri, Jun 27, 2008 at 10:30:34AM -0500, Scott Wood wrote:
>>> Anton Vorontsov wrote:
>>>> Just looked into x16 LP NAND spec, and it says that block should be
>>>> considered as bad when the first _Word_ isn't 0xff. So we indeed should
>>>> not ignore the second byte. Ouch.
>>> The FCM doesn't support 16-bit devices.
>>
>> And will never support?
>
> It's a hardware limitation in current chips (see the manual description
> of BRn[PS]), though upon further looking it seems that it may be
> supported in the future.
>
>> Then maybe, in addition, we could apply the first
>> patch that you've acked so we'll unbreak NANDs for pour souls that tried
>> to reflash the JFFS2 into NAND, so that they'll will not have to
>> "nand scrub" their NANDs?
>
> OK -- we can limit it to 8-bit chips once 16-bit support is added to the
> driver.

Great. So.. the final patchset.

--
Anton Vorontsov
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