diff --git a/scripts/kconfig/kconfigfunctions.py b/scripts/kconfig/kconfigfunctions.py
index 19ba25b..7a390a9 100644
--- a/scripts/kconfig/kconfigfunctions.py
+++ b/scripts/kconfig/kconfigfunctions.py
@@ -89,11 +89,9 @@
     if doc_mode or edt is None:
         return "n"
 
-    for node in edt.nodes:
-        if label in node.labels and node.enabled:
-            return "y"
+    node = edt.label2node.get(label)
 
-    return "n"
+    return "y" if node and node.enabled else "n"
 
 
 def _node_reg_addr(node, index, unit):
@@ -317,11 +315,7 @@
     if doc_mode or edt is None:
         return "n"
 
-    for node in edt.nodes:
-        if compat in node.compats and node.enabled:
-            return "y"
-
-    return "n"
+    return "y" if compat in edt.compat2enabled else "n"
 
 
 def dt_compat_on_bus(kconf, _, compat, bus):