diff options
| author | Peng Fan <van.freenix@gmail.com> | 2016-02-01 13:31:15 +0800 |
|---|---|---|
| committer | Anatolij Gustschin <agust@denx.de> | 2016-02-06 14:43:04 +0100 |
| commit | 1889a7e275c82cfa120004595a652e834c3723e1 (patch) | |
| tree | 88d8f58ab620d456940dff9dd373bff66e4189c4 | |
| parent | c4a45d4bdd68a24dd60fc3905649d23f7aec8a80 (diff) | |
fdt: introduce fdtdec_get_child_count
Introduce fdtdec_get_child_count for get the number of subnodes
of one parent node.
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | include/fdtdec.h | 9 | ||||
| -rw-r--r-- | lib/fdtdec.c | 11 |
2 files changed, 20 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h index dd82916dc00..d1c29a8a5d8 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -722,6 +722,15 @@ const u32 *fdtdec_locate_array(const void *blob, int node, */ int fdtdec_get_bool(const void *blob, int node, const char *prop_name); +/* + * Count child nodes of one parent node. + * + * @param blob FDT blob + * @param node parent node + * @return number of child node; 0 if there is not child node + */ +int fdtdec_get_child_count(const void *blob, int node); + /** * Look in the FDT for a config item with the given name and return its value * as a 32-bit integer. The property must have at least 4 bytes of data. The diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 0eb56af4d6d..1b1ca02e69e 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -831,6 +831,17 @@ int fdtdec_parse_phandle_with_args(const void *blob, int src_node, return rc; } +int fdtdec_get_child_count(const void *blob, int node) +{ + int subnode; + int num = 0; + + fdt_for_each_subnode(blob, subnode, node) + num++; + + return num; +} + int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, u8 *array, int count) { |