devicetree: Add DT_FOREACH_CHILD macro
The macro iterates through the list of child nodes and invokes provided
macro for each node.
Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
diff --git a/scripts/dts/gen_defines.py b/scripts/dts/gen_defines.py
index bacdc5e..a765804 100755
--- a/scripts/dts/gen_defines.py
+++ b/scripts/dts/gen_defines.py
@@ -48,8 +48,12 @@
with open(args.header_out, "w", encoding="utf-8") as header_file:
write_top_comment(edt)
+ # populate all z_path_id first so any children references will
+ # work correctly.
for node in sorted(edt.nodes, key=lambda node: node.dep_ordinal):
node.z_path_id = node_z_path_id(node)
+
+ for node in sorted(edt.nodes, key=lambda node: node.dep_ordinal):
write_node_comment(node)
if node.parent is not None:
@@ -57,6 +61,8 @@
out_dt_define(f"{node.z_path_id}_PARENT",
f"DT_{node.parent.z_path_id}")
+ write_child_functions(node)
+
if not node.enabled:
out_comment("No node macros: node is disabled")
continue
@@ -360,6 +366,23 @@
f"{node.z_path_id}_COMPAT_MATCHES_{str2ident(compat)}", 1)
+def write_child_functions(node):
+ # Writes macro that are helpers that will call a macro/function
+ # for each child node.
+
+ if node.children:
+ functions = ''
+ # For each subnode with non-empty list of labels add the
+ # first (non-alias) label to the string of ', ' separated
+ # list of labels.
+ for subnode in node.children.values():
+ functions = functions + f"fn(DT_{subnode.z_path_id}) "
+
+ if functions:
+ macro = f"{node.z_path_id}_FOREACH_CHILD(fn)"
+ out_dt_define(macro, functions)
+
+
def write_vanilla_props(node):
# Writes macros for any and all properties defined in the
# "properties" section of the binding for the node.
