kconfig: add dt_path_enabled, dt_alias_enabled
There is already a way to check if a node is enabled based on its node
label, but we don't have an equivalent way to do that for a path or an
alias. Add them. These rely on the same underlying edtlib machinery to
get their jobs done, but are being treated differently within Kconfig
in order to match distinctions between paths and aliases made in the
devicetree.h API.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
diff --git a/scripts/kconfig/kconfigfunctions.py b/scripts/kconfig/kconfigfunctions.py
index bfbbfdf..a851564 100644
--- a/scripts/kconfig/kconfigfunctions.py
+++ b/scripts/kconfig/kconfigfunctions.py
@@ -88,10 +88,44 @@
return node.path if node else ""
+def dt_node_enabled(kconf, name, node):
+ """
+ This function is used to test if a node is enabled (has status
+ 'okay') or not.
+
+ The 'node' argument is a string which is either a path or an
+ alias, or both, depending on 'name'.
+
+ If 'name' is 'dt_path_enabled', 'node' is an alias or a path. If
+ 'name' is 'dt_alias_enabled, 'node' is an alias.
+ """
+
+ if doc_mode or edt is None:
+ return "n"
+
+ if name == "dt_alias_enabled":
+ if node.startswith("/"):
+ # EDT.get_node() works with either aliases or paths. If we
+ # are specifically being asked about an alias, reject paths.
+ return "n"
+ else:
+ # Make sure this is being called appropriately.
+ assert name == "dt_path_enabled"
+
+ try:
+ node = edt.get_node(node)
+ except edtlib.EDTError:
+ return "n"
+
+ return "y" if node and node.enabled else "n"
+
+
def dt_nodelabel_enabled(kconf, _, label):
"""
- This function takes a 'label' and returns "y" if we find an "enabled"
- node that has a 'nodelabel' of 'label' in the EDT otherwise we return "n"
+ This function is like dt_node_enabled(), but the 'label' argument
+ should be a node label, like "foo" is here:
+
+ foo: some-node { ... };
"""
if doc_mode or edt is None:
return "n"
@@ -390,6 +424,8 @@
"dt_chosen_label": (dt_chosen_label, 1, 1),
"dt_chosen_enabled": (dt_chosen_enabled, 1, 1),
"dt_chosen_path": (dt_chosen_path, 1, 1),
+ "dt_path_enabled": (dt_node_enabled, 1, 1),
+ "dt_alias_enabled": (dt_node_enabled, 1, 1),
"dt_nodelabel_enabled": (dt_nodelabel_enabled, 1, 1),
"dt_chosen_reg_addr_int": (dt_chosen_reg, 1, 3),
"dt_chosen_reg_addr_hex": (dt_chosen_reg, 1, 3),
