diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
index bac4afa3b197..0a646334f2b7 100644
--- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
@@ -63,6 +63,9 @@ reusable (optional) - empty property
       able to reclaim it back. Typically that means that the operating
       system can use that region to store volatile or cached data that
       can be otherwise regenerated or migrated elsewhere.
+inactive (optional) - empty property
+    - Indicates the operating system must not active the region. It's only
+      do active or inactive for region reusable.
 
 Linux implementation note:
 - If a "linux,cma-default" property is present, then Linux will use the