diff --git a/Documentation/devicetree/bindings/rtc/rtc.yaml b/Documentation/devicetree/bindings/rtc/rtc.yaml
index ee237b2ed66a69bce8b0519044106e4699b20b10..6b8a11325691756e33c1a1fe5dce9b216339e9ee 100644
--- a/Documentation/devicetree/bindings/rtc/rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/rtc.yaml
@@ -17,6 +17,15 @@ properties:
   $nodename:
     pattern: "^rtc(@.*|-[0-9a-f])*$"
 
+  aux-voltage-chargeable:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description: |
+      Tells whether the battery/supercap of the RTC (if any) is
+      chargeable or not:
+      0: not chargeable
+      1: chargeable
+
   quartz-load-femtofarads:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
@@ -35,6 +44,7 @@ properties:
     description:
       Do not use internal trickle charger diode. Should be given if
       internal trickle charger diode should be disabled.
+    deprecated: true
 
   trickle-resistor-ohms:
     $ref: /schemas/types.yaml#/definitions/uint32