@@ -0,0 +1,43 @@
+MediaTek GCE
+===============
+
+The Global Command Engine (GCE) is used to help read/write registers with
+critical time limitation, such as updating display configuration during the
+vblank. The GCE can be used to implement the Command Queue (CMDQ) driver.
+
+CMDQ driver uses mailbox framework for communication. Please refer to
+mailbox.txt for generic information about mailbox device-tree bindings.
+
+Required properties:
+- compatible: Must be "mediatek,mt8173-gce"
+- reg: Address range of the GCE unit
+- interrupts: The interrupt signal from the GCE block
+- clock: Clocks according to the common clock binding
+- clock-names: Must be "gce" to stand for GCE clock
+- #mbox-cells: Should be 2
+
+Required properties for a client device:
+- mboxes: client use mailbox to communicate with GCE, it should have this
+  property and list of phandle, mailbox channel specifiers, and atomic
+  execution flag.
+
+Example:
+
+	gce: gce at 10212000 {
+		compatible = "mediatek,mt8173-gce";
+		reg = <0 0x10212000 0 0x1000>;
+		interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infracfg CLK_INFRA_GCE>;
+		clock-names = "gce";
+
+		#mbox-cells = <2>;
+	};
+
+Example for a client device:
+
+	mmsys: clock-controller at 14000000 {
+		compatible = "mediatek,mt8173-mmsys";
+		mboxes = <&gce 0 1 /* main display with atomic execution */
+			  &gce 1 1>; /* sub display with atomic execution */
+		...
+	};