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authorMatthias Schiffer <mschiffer@universe-factory.net>2018-01-09 21:03:00 +0100
committerMatthias Schiffer <mschiffer@universe-factory.net>2018-01-11 11:51:07 +0100
commit1abb5c6db11bd8a3c79b9e24ac4511985fe39ea4 (patch)
treed3ed759b2fa1b45131b9788e9abed622005eb9d1 /target/linux/generic/pending-4.9
parentf73f1aee768472877c2297e4a965ca753dbb89d5 (diff)
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generic: unlock Winbond flash on boot
The underlying issue breaking Spansion flash has been fixed with "mtd: spi-nor: wait until lock/unlock operations are ready" and "mtd: spi-nor: wait for SR_WIP to clear on initial unlock", so we can support unlocking for Winbond flash again. This is necessary to have writable flash on certain UBNT devices with some bootloader versions. Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Diffstat (limited to 'target/linux/generic/pending-4.9')
-rw-r--r--target/linux/generic/pending-4.9/466-Revert-mtd-spi-nor-fix-Spansion-regressions-aliased-.patch37
1 files changed, 37 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.9/466-Revert-mtd-spi-nor-fix-Spansion-regressions-aliased-.patch b/target/linux/generic/pending-4.9/466-Revert-mtd-spi-nor-fix-Spansion-regressions-aliased-.patch
new file mode 100644
index 0000000..e032b08
--- /dev/null
+++ b/target/linux/generic/pending-4.9/466-Revert-mtd-spi-nor-fix-Spansion-regressions-aliased-.patch
@@ -0,0 +1,37 @@
+From: Matthias Schiffer <mschiffer@universe-factory.net>
+Date: Tue, 9 Jan 2018 20:41:48 +0100
+Subject: [PATCH] Revert "mtd: spi-nor: fix Spansion regressions (aliased with
+ Winbond)"
+
+This reverts commit 67b9bcd36906e12a15ffec19463afbbd6a41660e.
+
+The underlying issue breaking Spansion flash has been fixed with "mtd: spi-nor:
+wait until lock/unlock operations are ready" and "mtd: spi-nor: wait for SR_WIP
+to clear on initial unlock", so we can support unlocking for Winbond flash
+again.
+
+Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
+---
+ drivers/mtd/spi-nor/spi-nor.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -1597,6 +1597,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ JEDEC_MFR(info) == SNOR_MFR_INTEL ||
+ JEDEC_MFR(info) == SNOR_MFR_MACRONIX ||
+ JEDEC_MFR(info) == SNOR_MFR_SST ||
++ JEDEC_MFR(info) == SNOR_MFR_WINBOND ||
+ info->flags & SPI_NOR_HAS_LOCK) {
+ write_enable(nor);
+ write_sr(nor, 0);
+@@ -1615,7 +1616,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+
+ /* NOR protection support for STmicro/Micron chips and similar */
+ if (JEDEC_MFR(info) == SNOR_MFR_MICRON ||
+- info->flags & SPI_NOR_HAS_LOCK) {
++ JEDEC_MFR(info) == SNOR_MFR_WINBOND ||
++ info->flags & SPI_NOR_HAS_LOCK) {
+ nor->flash_lock = stm_lock;
+ nor->flash_unlock = stm_unlock;
+ nor->flash_is_locked = stm_is_locked;