https://github.com/torvalds/linux
Revision 67b9bcd36906e12a15ffec19463afbbd6a41660e authored by Brian Norris on 15 December 2015, 18:48:20 UTC, committed by Brian Norris on 06 January 2016, 00:00:03 UTC
Spansion and Winbond have occasionally used the same manufacturer ID,
and they don't support the same features. Particularly, writing SR=0
seems to break read access for Spansion's s25fl064k. Unfortunately, we
don't currently have a way to differentiate these Spansion and Winbond
parts, so rather than regressing support for these Spansion flash, let's
drop the new Winbond lock/unlock support for now. We can try to address
Winbond support during the next release cycle.

Original discussion:

http://patchwork.ozlabs.org/patch/549173/
http://patchwork.ozlabs.org/patch/553683/

Fixes: 357ca38d4751 ("mtd: spi-nor: support lock/unlock/is_locked for Winbond")
Fixes: c6fc2171b249 ("mtd: spi-nor: disable protection for Winbond flash at startup")
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reported-by: Felix Fietkau <nbd@openwrt.org>
Cc: Felix Fietkau <nbd@openwrt.org>
1 parent 472b444
History
Tip revision: 67b9bcd36906e12a15ffec19463afbbd6a41660e authored by Brian Norris on 15 December 2015, 18:48:20 UTC
mtd: spi-nor: fix Spansion regressions (aliased with Winbond)
Tip revision: 67b9bcd
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