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kernel: disable software protection bits for macronix flash chips at init

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The bootloader of AirOS 5.6.x doesn't remove the flash protection for us,
so we have to do this ourselves.
This commit is contained in:
Matthias Schiffer 2016-02-26 04:39:50 +01:00 committed by Christof Schulze
parent 580326dcf5
commit 71a23bc461
1 changed files with 22 additions and 0 deletions
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22
patches/openwrt/0055-kernel-disable-software-protection-bits-for-macronix-flash-chips-at-init.patch Normal file
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@ -0,0 +1,22 @@
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Fri, 26 Feb 2016 04:24:06 +0100
Subject: kernel: disable software protection bits for macronix flash chips at init
Backport of r47626
diff --git a/target/linux/generic/patches-3.18/465-m25p80-mx-disable-software-protection.patch b/target/linux/generic/patches-3.18/465-m25p80-mx-disable-software-protection.patch
new file mode 100644
index 0000000..d7d7eec
--- /dev/null
+++ b/target/linux/generic/patches-3.18/465-m25p80-mx-disable-software-protection.patch
@@ -0,0 +1,10 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -962,6 +962,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+
+ if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ATMEL ||
+ JEDEC_MFR(info->jedec_id) == CFI_MFR_INTEL ||
++ JEDEC_MFR(info->jedec_id) == CFI_MFR_MACRONIX ||
+ JEDEC_MFR(info->jedec_id) == CFI_MFR_SST) {
+ write_enable(nor);
+ write_sr(nor, 0);