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Commit 07b2c5c0 authored by Angelo Dureghello's avatar Angelo Dureghello Committed by Stefan Roese
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mtd/cfi: add support for SST 4KB sector granularity


Add support for SST 4KB sector granularity.

Many recent SST flashes, i.e. SST39VF3201B and similar of this family
are declared CFI-conformant from SST. They support CFI query, but implement
2 different sector sizes in the same memory: a 64KB sector (they call it
"block", std AMD erase cmd=0x30), and a 4KB sector (they call it "sector",
erase cmd=0x50). Also, CFI query on these chips, reading from address 0x2dh
of cfi query struct, detects a number of secotrs for the 4KB granularity
(flinfo shows it).

For all other aspects, they are CFI compliant, so, as Linux do, i think
it's a good idea to handle these chips in the CFI driver, with a fixup
to allow 4KB granularity, as should be expected, instead of 64KB.

Signed-off-by: default avatarAngelo Dureghello <sysamfw@gmail.com>
Signed-off-by: default avatarStefan Rose <sr@denx.de>
parent 642ef40b
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