dm: core: Add livetree definitions

[people/ms/u-boot.git] / dts / Kconfig

diff --git a/dts/Kconfig b/dts/Kconfig
index 9a0622154ad0befb28ba76509b6a310e7dfe089d..b3009af03f593e1fe10de352150b050b0ab24c88 100644 (file)
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -32,6 +32,17 @@ config SPL_OF_CONTROL
          which is not enough to support device tree. Enable this option to
          allow such boards to be supported by U-Boot SPL.
 
+config OF_LIVE
+       bool "Enable use of a live tree"
+       depends on OF_CONTROL
+       help
+         Normally U-Boot uses a flat device tree which saves space and
+         avoids the need to unpack the tree before use. However a flat
+         tree does not support modifcation from within U-Boot since it
+         can invalidate driver-model device tree offsets. This option
+         enables a live tree which is available after relocation,
+         and can be adjusted as needed.
+
 choice
        prompt "Provider of DTB for DT control"
        depends on OF_CONTROL