devicetree: Add support for fixed-partitions
Add DT_NODE_BY_FIXED_PARTITION_LABEL that given a "label" in any
fixed-partitions map will return the node_id for that partition node.
Add DT_NODE_HAS_FIXED_PARTITION_LABEL that will test if a given
fixed-partitions "label" is valid.
Add DT_FIXED_PARTITION_ID that will return an unique ordinal value for
the partition give a node_id to the partition.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
diff --git a/scripts/dts/gen_defines.py b/scripts/dts/gen_defines.py
index 87f5234..94f385a 100755
--- a/scripts/dts/gen_defines.py
+++ b/scripts/dts/gen_defines.py
@@ -29,6 +29,7 @@
def main():
global header_file
+ global flash_area_num
args = parse_args()
@@ -41,6 +42,8 @@
except edtlib.EDTError as e:
sys.exit(f"devicetree error: {e}")
+ flash_area_num = 0
+
# Save merged DTS source, as a debugging aid
with open(args.dts_out, "w", encoding="utf-8") as f:
print(edt.dts_source, file=f)
@@ -254,6 +257,8 @@
# data cannot otherwise be obtained from write_vanilla_props()
# results
+ global flash_area_num
+
out_comment("Special property macros:")
# Macros that are special to the devicetree specification
@@ -262,6 +267,10 @@
write_compatibles(node)
write_status(node)
+ if node.parent and "fixed-partitions" in node.parent.compats:
+ macro = f"{node.z_path_id}_PARTITION_ID"
+ out_dt_define(macro, flash_area_num)
+ flash_area_num += 1
def write_regs(node):
# reg property: edtlib knows the right #address-cells and
@@ -586,6 +595,18 @@
" ".join(f"fn({edt.compat2nodes[compat].index(node)})"
for node in okay_nodes)
+ for compat, nodes in edt.compat2nodes.items():
+ for node in nodes:
+ if compat == "fixed-partitions":
+ for child in node.children.values():
+ if "label" in child.props:
+ label = child.props["label"].val
+ macro = f"COMPAT_{str2ident(compat)}_LABEL_{str2ident(label)}"
+ val = f"DT_{child.z_path_id}"
+
+ out_dt_define(macro, val)
+ out_dt_define(macro + "_EXISTS", 1)
+
out_comment('Macros for compatibles with status "okay" nodes\n')
for compat, okay_nodes in edt.compat2okay.items():
if okay_nodes:
