[U-Boot] [PATCH 1/1] mtd/cfi: add support for SST 4KB sector granularity

[Stefan Roese]

On 12/01/2012 01:14 AM, Angelo Dureghello wrote:
> 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.

Applied to u-boot-cfi-flash/master. Thanks.

Thanks,
Stefan