[PATCH 2/5] bootwrapper: Add CONFIG_DEVICE_TREE

[Scott Wood]

This provides a way to tell the bootwrapper makefile which device tree to
include by default.  The wrapper can still be invoked standalone to wrap
with a different device tree without reconfiguring the kernel, if that is
desired.

Signed-off-by: Scott Wood <scottwood at freescale.com>
---
 arch/powerpc/Kconfig |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 20a8fdc..3b458e1 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -590,6 +590,22 @@ config SECCOMP
 
 	  If unsure, say Y. Only embedded should say N here.
 
+config DEVICE_TREE
+	string "Static device tree source file"
+	help
+	  This specifies the device tree source (.dts) file to be
+	  compiled and included when building the bootwrapper.
+	  If a relative filename is given, then it will be relative
+	  to arch/powerpc/boot/dts.
+
+	  This is required when building a cuImage target for an
+	  older U-Boot, which cannot pass a device tree itself.
+	  Such a kernel will not work with a newer U-Boot that
+	  tries to pass a device tree (unless you tell it not to).
+	  If your U-Boot does not mention a device tree in
+	  "help bootm", then use the cuImage target and specify
+	  a device tree here.  Otherwise, use the uImage target.
+
 endmenu
 
 config ISA_DMA_API
-- 
1.5.0.3