Commit 74f8977e authored by Dennis Gilmore's avatar Dennis Gilmore Committed by Stefan Roese
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ARM: Distro boot: document the need for fdtfile variable to be set

When testing builds provided in

I discovered that fdtfile was not set and as a result the firmware was not
functional. So I am documenting what is needed.
Signed-off-by: default avatarDennis Gilmore <>

Cc: Atish Patra <>
Cc: Lukas Auer <>
Cc: Tom Rini <>
Cc: Masahiro Yamada <>
Cc: Vagrant Cascadian <>
Cc: Stephen Warren <>
Cc: Karsten Merker <>
parent e262b297
......@@ -224,6 +224,17 @@ fdt_addr_r:
A size of 1MB for the FDT/DTB seems reasonable.
Mandatory. the name of the DTB file for the specific board for instance
the espressobin v5 board the value is "marvell/armada-3720-espressobin.dtb"
while on a clearfog pro it is "armada-388-clearfog-pro.dtb" in the case of
a board providing its firmware based DTB this value can be used to override
the DTB with a different DTB. fdtfile will automatically be set for you if
it matches the format ${soc}-${board}.dtb which covers most 32 bit use cases.
AArch64 generally does not match as the Linux kernel put the dtb files under
SoC vendor directories.
Mandatory. The location in RAM where the initial ramdisk will be loaded to
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