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

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
parent 56f1cd5383
commit 89b3dca8b5
1 changed files with 22 additions and 0 deletions
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22
patches/openwrt/0043-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);