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kernel: add parser finding rootfs after CFE bootfs

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It's required for BCM4908. It cannot use "bcm-wfi-fw" parser because
that one requires *two* JFFS2 partitions which is untested / unsupported
on the BCM4908 architecture. With a single JFFS2 partition "bcm-wfi-fw"
parser will:
1. Fail to find "vmlinux.lz" as it doesn't follow "1-openwrt" file
2. Create partitions that don't precisely match bootfs layout

The new parser is described in details in the MTD_SPLIT_CFE_BOOTFS
symbol help message.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
This commit is contained in:
Rafał Miłecki
2021-01-20 16:49:26 +01:00
parent 6ba3a0e889
commit 20b4f77bb6
4 changed files with 101 additions and 1 deletions
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12
target/linux/generic/files/drivers/mtd/mtdsplit/Kconfig
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@@ -25,6 +25,18 @@ config MTD_SPLIT_BCM_WFI_FW
depends on MTD_SPLIT_SUPPORT
select MTD_SPLIT
config MTD_SPLIT_CFE_BOOTFS
bool "Parser finding rootfs appended to the CFE bootfs"
depends on MTD_SPLIT_SUPPORT && ARCH_BCM4908
select MTD_SPLIT
help
cferom on BCM4908 (and bcm63xx) uses JFFS2 bootfs partition
for storing kernel, cferam and some device specific files.
There isn't any straight way of storing rootfs so it gets
appended to the JFFS2 bootfs partition. Kernel needs to find
it and run init from it. This parser is responsible for
finding appended rootfs.
config MTD_SPLIT_SEAMA_FW
bool "Seama firmware parser"
depends on MTD_SPLIT_SUPPORT