fdt: Add support for embedded device tree (CONFIG_OF_EMBED)

[people/ms/u-boot.git] / README

diff --git a/README b/README
index d618957eae2b938e6adb05e69f2da16ea09f1acb..094869c10651ebdc4f7f27ba8b9c2b87ce08d33c 100644 (file)
--- a/README
+++ b/README
@@ -824,8 +824,15 @@ The following options need to be configured:
                experimental and only available on a few boards. The device
                tree is available in the global data as gd->fdt_blob.
 
-               U-Boot needs to get its device tree from somewhere. This will
-               be enabled in a future patch.
+               U-Boot needs to get its device tree from somewhere. At present
+               the only way is to embed it in the image with CONFIG_OF_EMBED.
+
+               CONFIG_OF_EMBED
+               If this variable is defined, U-Boot will embed a device tree
+               binary in its image. This device tree file should be in the
+               board directory and called <soc>-<board>.dts. The binary file
+               is then picked up in board_init_f() and made available through
+               the global data structure as gd->blob.
 
 - Watchdog:
                CONFIG_WATCHDOG