Bad blocks in MLC NAND
Reuben.Dowle at navico.com
Tue Feb 3 19:15:21 EST 2009
> I thought we can override the defaults by using nand_bbt_descr and
passing it to nand->badblock_pattern ?
> I had a similar question based on
This is not related to the 8x/16x interface differences, rather it is
the difference between BB handling of SLC and (most) MLC nand devices.
The nand_bbt_descr struction contains information on the location of the
bad block marker within a given page, not which page inside a block
contains the bad block marker.
Also, this structure is not used by the nand_block_bad function in
nand_base.c anyway. It would be possible for a driver to override the
nand_chip -> block_bad function to re-impliment nand_block_bad, however
I don't think this should happen at the nand driver level.
Supporting the majority of MLC nand should be something that the nand
layer should do as standard.
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