@@ -21,11 +21,19 @@ Required properties:
 	priority: Priority of GCE thread.
 	atomic_exec: GCE processing continuous packets of commands in atomic
 		way.
+- #subsys-cells: Should be 3.
+	<&phandle subsys_number start_offset size>
+	phandle: Label name of a gce node.
+	subsys_number: specify the sub-system id which is corresponding
+		       to the register address.
+	start_offset: the start offset of register address that GCE can access.
+	size: the total size of register address that GCE can access.
 
 Required properties for a client device:
 - mboxes: Client use mailbox to communicate with GCE, it should have this
   property and list of phandle, mailbox specifiers.
-- mediatek,gce-subsys: u32, specify the sub-system id which is corresponding
+Optional propertier for a client device:
+- mediatek,gce-client-reg: u32, specify the sub-system id which is corresponding
   to the register address.
 
 Some vaules of properties are defined in 'dt-bindings/gce/mt8173-gce.h'

@@ -40,6 +48,7 @@ Example:
 		clocks = <&infracfg CLK_INFRA_GCE>;
 		clock-names = "gce";
 		#mbox-cells = <3>;
+		#subsys-cells = <3>;
 	};
 
 Example for a client device:

@@ -48,9 +57,9 @@ Example for a client device:
 		compatible = "mediatek,mt8173-mmsys";
 		mboxes = <&gce 0 CMDQ_THR_PRIO_LOWEST 1>,
 			 <&gce 1 CMDQ_THR_PRIO_LOWEST 1>;
-		mediatek,gce-subsys = <SUBSYS_1400XXXX>;
 		mutex-event-eof = <CMDQ_EVENT_MUTEX0_STREAM_EOF
 				CMDQ_EVENT_MUTEX1_STREAM_EOF>;
-
+		mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0x3000 0x1000>,
+					  <&gce SUBSYS_1401XXXX 0x2000 0x100>;
 		...
 	};