diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-dsp-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-dsp-rproc.yaml
index 4323cefdf19b..cedbc5efdc56 100644
--- a/Documentation/devicetree/bindings/remoteproc/ti,k3-dsp-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-dsp-rproc.yaml
@@ -142,6 +142,14 @@ examples:
         #address-cells = <2>;
         #size-cells = <2>;
 
+        mailbox0_cluster3: mailbox-0 {
+            #mbox-cells = <1>;
+        };
+
+        mailbox0_cluster4: mailbox-1 {
+            #mbox-cells = <1>;
+        };
+
         bus@100000 {
             compatible = "simple-bus";
             #address-cells = <2>;
diff --git a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
index 0f2bb06cb7b4..0868154a0364 100644
--- a/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml
@@ -238,6 +238,14 @@ examples:
         #address-cells = <2>;
         #size-cells = <2>;
 
+        mailbox0: mailbox-0 {
+            #mbox-cells = <1>;
+        };
+
+        mailbox1: mailbox-1 {
+            #mbox-cells = <1>;
+        };
+
         bus@100000 {
             compatible = "simple-bus";
             #address-cells = <2>;