RFC: [PATCH] MTD OneNAND: multiblock erase support
adrian.hunter at nokia.com
Mon Jun 15 06:11:56 EDT 2009
Mika Korhonen wrote:
> I wrote an initial support for OneNAND multiblock erase feature. When
> done in maximum 64 eraseblock batches multiblock erase is up to 30x
> faster than block-by-block erase (not including erase verify, though).
> However, I only had possibility to test this with an OMAP board, so I
> don't know if e.g. the default onenand_wait needs adjustment. Also for
> Flex-OneNAND the support goes off. Does Flex even have mb erase?
> What do you think?
I expect all OneNAND support multiblock erase, so the config should
go away. Kyungmin can probably comment on that.
Waiting for multiblock-erase, you should probably spin, not use the
interrupt line. You should change the wait function in
onenand_base and omap2.c.
You should handle multiple multiblock erases.
You should check for bad blocks *before* doing command 0x95
Waiting for erase-verify, you should probably spin too.
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