lib: correct description of CONFIG_SYS_FDT_PAD

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>

diff --git a/lib/Kconfig b/lib/Kconfig
index 1a683de..a21b337 100644 (file)
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -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"