doc: Add Readonly flag support documentation

diff --git a/doc/target-api.txt b/doc/target-api.txt
index 6e19594..b9fa52e 100644 (file)
--- a/doc/target-api.txt
+++ b/doc/target-api.txt
@@ -70,6 +70,11 @@ Properties   string Type [readonly]
                        List of NDEF records object paths.
                        This is only valid for tag type targets.
 
+               boolean ReadOnly [readonly]
+
+                       Give the current status of tag's read mode
+                       This is valid for tag type and device targets
+
 
 Record hierarchy
 ================