diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt
index b79a4794a928..0cacbc0edd20 100644
--- a/Documentation/devicetree/bindings/rtc/rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc.txt
@@ -21,12 +21,16 @@ Optional properties
 The following properties may not be supported by all drivers. However, if a
 driver wants to support one of the below features, it should adapt the bindings
 below.
-- trickle-resistor-ohms : Selected resistor for trickle charger. Should be given
-                          if trickle charger should be enabled
-- trickle-diode-disable : Do not use internal trickle charger diode Should be
-                          given if internal trickle charger diode should be
-                          disabled
-- wakeup-source :         Enables wake up of host system on alarm
+- trickle-resistor-ohms :   Selected resistor for trickle charger. Should be given
+                            if trickle charger should be enabled
+- trickle-diode-disable :   Do not use internal trickle charger diode Should be
+                            given if internal trickle charger diode should be
+                            disabled
+- wakeup-source :           Enables wake up of host system on alarm
+- quartz-load-femtofarads : The capacitive load of the quartz(x-tal),
+                            expressed in femto Farad (fF).
+                            The default value shall be listed (if optional),
+                            and likewise all valid values.
 
 Trivial RTCs
 ------------