From c71b64f3617b5a4362c6e4e0aefdd66d6ac6affd Mon Sep 17 00:00:00 2001 From: Gerald Van Baren Date: Mon, 15 Oct 2012 22:24:36 -0400 Subject: libfdt: Add helper function to create a trivial, empty tree The libfdt read/write functions are now usable enough that it's become a moderately common pattern to use them to build and manipulate a device tree from scratch. For example, we do so ourself in our rw_tree1 testcase, and qemu is starting to use this model when building device trees for some targets such as e500. However, the read/write functions require some sort of valid tree to begin with, so this necessitates either having a trivial canned dtb to begin with or, more commonly, creating an empty tree using the serial-write functions first. This patch adds a helper function which uses the serial-write functions to create a trivial, empty but complete and valid tree in a supplied buffer, ready for manipulation with the read/write functions. Signed-off-by: David Gibson From git://git.jdl.com/software/dtc.git patch hash be6026838 with adaptations to include/libfdt.h and lib/libfdt/Makefile for the U-Boot environment. Signed-off-by: Gerald Van Baren --- lib/libfdt/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'lib/libfdt/Makefile') diff --git a/lib/libfdt/Makefile b/lib/libfdt/Makefile index c965577..0693d4b 100644 --- a/lib/libfdt/Makefile +++ b/lib/libfdt/Makefile @@ -27,7 +27,7 @@ LIB = $(obj)libfdt.o SOBJS = -COBJS-libfdt += fdt.o fdt_ro.o fdt_rw.o fdt_strerror.o fdt_sw.o fdt_wip.o +COBJS-libfdt += fdt.o fdt_ro.o fdt_rw.o fdt_strerror.o fdt_sw.o fdt_wip.o fdt_empty_tree.o COBJS-$(CONFIG_OF_LIBFDT) += $(COBJS-libfdt) COBJS-$(CONFIG_FIT) += $(COBJS-libfdt) -- cgit v1.1