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authorBrian Norris <computersforpeace@gmail.com>2015-12-15 10:48:20 -0800
committerBrian Norris <computersforpeace@gmail.com>2016-01-05 16:00:03 -0800
commit67b9bcd36906e12a15ffec19463afbbd6a41660e (patch)
tree19adb5fb993d851e177a9d958f102844ce87bc5a /include/linux/mtd
parent472b444eef934eb7e90334efdd7fc7954cfe5132 (diff)
mtd: spi-nor: fix Spansion regressions (aliased with Winbond)
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>
Diffstat (limited to 'include/linux/mtd')
-rw-r--r--include/linux/mtd/spi-nor.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index c8723b62c4cd..bc742dac7d3a 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -25,7 +25,7 @@
#define SNOR_MFR_MACRONIX CFI_MFR_MACRONIX
#define SNOR_MFR_SPANSION CFI_MFR_AMD
#define SNOR_MFR_SST CFI_MFR_SST
-#define SNOR_MFR_WINBOND 0xef
+#define SNOR_MFR_WINBOND 0xef /* Also used by some Spansion */
/*
* Note on opcode nomenclature: some opcodes have a format like