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| author | Rafał Miłecki <rafal@milecki.pl> | 2021-01-21 13:26:17 +0100 |
|---|---|---|
| committer | Rafał Miłecki <rafal@milecki.pl> | 2021-01-21 13:30:20 +0100 |
| commit | 3bd8f660a4b967a25aa7b605f0ead44ddfab9ea4 (patch) | |
| tree | 33e4e27e24d6f1030299c91eda2d7d1a3be6386c /target | |
| parent | e78d3e44dddaaa89e101b42574f13bc6aeb6b6ae (diff) | |
| download | upstream-3bd8f660a4b967a25aa7b605f0ead44ddfab9ea4.tar.gz upstream-3bd8f660a4b967a25aa7b605f0ead44ddfab9ea4.tar.bz2 upstream-3bd8f660a4b967a25aa7b605f0ead44ddfab9ea4.zip | |
bcm4908: workaround NAND controller #WP issue
There seems to be a problem with setting #WP. On the other hand ignoring
the #WP seems to work. rootfs_data UBI volume seems to persist changes.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/bcm4908/patches-5.4/400-mtd-rawnand-brcmnand-disable-WP-on-BCM4908.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/bcm4908/patches-5.4/400-mtd-rawnand-brcmnand-disable-WP-on-BCM4908.patch b/target/linux/bcm4908/patches-5.4/400-mtd-rawnand-brcmnand-disable-WP-on-BCM4908.patch new file mode 100644 index 00000000000..65066236db9 --- /dev/null +++ b/target/linux/bcm4908/patches-5.4/400-mtd-rawnand-brcmnand-disable-WP-on-BCM4908.patch @@ -0,0 +1,34 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Thu, 21 Jan 2021 10:44:53 +0100 +Subject: [PATCH] mtd: rawnand: brcmnand: disable WP on BCM4908 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +BCM4908 contains NAND controller version 0x0701 (v7.1). It means that +NAND_WP should be available. + +For some reason setting #WP on doesn't result in clearing NAND_STATUS_WP +status bit: +[ 1.077857] bcm63138_nand ff801800.nand: timeout on status poll (expected c0000040 got c00000c0) +[ 1.086832] bcm63138_nand ff801800.nand: nand #WP expected on + +For now try working without touching #WP. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +--- + +--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c ++++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c +@@ -38,7 +38,11 @@ + * 1: NAND_WP is set by default, cleared for erase/write operations + * 2: NAND_WP is always cleared + */ ++#if IS_ENABLED(CONFIG_ARCH_BCM4908) ++static int wp_on = 0; ++#else + static int wp_on = 1; ++#endif + module_param(wp_on, int, 0444); + + /*********************************************************************** |