diff --git a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
index f096f286da19c..fbd69b4cecc70 100644
--- a/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/brcm,brcmstb-gpio.yaml
@@ -64,6 +64,10 @@ properties:
 
   gpio-ranges: true
 
+  gpio-line-names:
+    minItems: 1
+    maxItems: 128
+
   wakeup-source:
     type: boolean
     description: >