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lib: correct description of CONFIG_SYS_FDT_PAD

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CONFIG_SYS_FDT_PAD defines the number of unused bytes added to a
device-tree and not the total size.

Fixes: 40ed7be4af52 ("Convert CONFIG_SYS_FDT_PAD to Kconfig")
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Heinrich Schuchardt 2025-03-02 16:02:31 +01:00
parent 7cf559d4cb
commit cb21476496
1 changed files with 4 additions and 4 deletions
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lib/Kconfig
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@ -1008,14 +1008,14 @@ config OF_LIBFDT_OVERLAY
This enables the FDT library (libfdt) overlay support.
config SYS_FDT_PAD
hex "Maximum size of the FDT memory area passeed to the OS"
hex "Free space added to device-tree before booting"
depends on OF_LIBFDT
default 0x13000 if FMAN_ENET || QE || U_QE
default 0x3000
help
During OS boot, we allocate a region of memory within the bootmap
for the FDT. This is the size that we will expand the FDT that we
are using will be extended to be, in bytes.
The operating system may need a free area at the end of the device-
tree for fix-ups. This setting defines by how many bytes U-Boot
extends the device-tree before booting.
config SPL_OF_LIBFDT
bool "Enable the FDT library for SPL"