diff options
| author | Gerald Van Baren <gvb@unssw.com> | 2012-10-15 22:24:36 -0400 |
|---|---|---|
| committer | Gerald Van Baren <gvb@unssw.com> | 2012-10-15 22:24:36 -0400 |
| commit | c71b64f3617b5a4362c6e4e0aefdd66d6ac6affd (patch) | |
| tree | 947b4febb1b863d9028274c064da2f698b803120 /include/libfdt.h | |
| parent | 8ac88f2d2818c8efc1558626a4e7fb47dcc18987 (diff) | |
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 <david@gibson.dropbear.id.au>
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 <vanbaren@cideas.com>
Diffstat (limited to 'include/libfdt.h')
| -rw-r--r-- | include/libfdt.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/libfdt.h b/include/libfdt.h index 4589c5feb45..c93ae28833e 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -1014,6 +1014,7 @@ int fdt_finish(void *fdt); /* Read-write functions */ /**********************************************************************/ +int fdt_create_empty_tree(void *buf, int bufsize); int fdt_open_into(const void *fdt, void *buf, int bufsize); int fdt_pack(void *fdt); |