Re: [PATCH 00/10] mtd: spi-nor: cleanups + block protection support updates

[Brian Norris <computersforpeace@gmail.com>]

On Tue, Sep 01, 2015 at 12:57:05PM -0700, Brian Norris wrote:
> [Note: as this is sent out during the merge window, it's based on the
> semi-unofficial l2-mtd.git/next branch, which is targeting 4.4, not 4.3]
> 
> Hi all,
> 
> I've been reviewing various spi-nor drivers as well as working with some
> Winbond flash to support new locking features. The former helped point out a
> few more things that could use some improvement, and the latter suggested that
> we have some glaring oversights in the spi-nor lock/unlock code.
> 
> <side note>
> Some helpful companion code, for mtd-utils:
> 
>  http://lists.infradead.org/pipermail/linux-mtd/2015-August/061526.html
> 
> This extends the flash_lock tool so that you can more easily test specific
> ranges, using:
> 
>   # flash_lock --lock /dev/mtdX <offset> <block-count>
>   # flash_lock --unlock /dev/mtdX <offset> <block-count>
>   # flash_lock --islocked /dev/mtdX <offset> <block-count>
> </side note>
> 
> The first half of this series is fairly self-explanatory. The second might take
> a bit of thought, as a formulaic approach is a little more subtle than a
> table-based approach, so I tried to copy the relevant portions distilled from a
> few datasheets and include comments. Please shout if anything deserves more
> explanation or looks funny to you.
> 
> Highlights:
> 
>  * clean up spi-nor.h header
>  * spi-nor now supports MEMISLOCKED
>  * MEM{LOCK,UNLOCK} support is a little more robust and extendible
>  * turn on dual/quad read for Winbond w25q{32,64}dw
>  * enable block protection for Winbond flash
> 
> Regards,
> Brian

Pushed all to l2-mtd.git, with some minor context fixups for patch 8