ARM: dts: rockchip: add vop device node for rk3036

The rk3036 support two overlay plane and one hwc plane,
it supports IOMMU, and its IOMMU same as rk3288's.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3036.dtsi

@@ -119,6 +119,11 @@
 		interrupt-affinity = <&cpu0>, <&cpu1>;
 	};
 
+	display-subsystem {
+		compatible = "rockchip,display-subsystem";
+		ports = <&vop_out>;
+	};
+
 	timer {
 		compatible = "arm,armv7-timer";
 		arm,cpu-registers-not-fw-configured;
@@ -149,6 +154,32 @@
 		};
 	};
 
+	vop: vop@10118000 {
+		compatible = "rockchip,rk3036-vop";
+		reg = <0x10118000 0x19c>;
+		interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru ACLK_LCDC>, <&cru SCLK_LCDC>, <&cru HCLK_LCDC>;
+		clock-names = "aclk_vop", "dclk_vop", "hclk_vop";
+		resets = <&cru SRST_LCDC1_A>, <&cru SRST_LCDC1_H>, <&cru SRST_LCDC1_D>;
+		reset-names = "axi", "ahb", "dclk";
+		iommus = <&vop_mmu>;
+		status = "disabled";
+
+		vop_out: port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+	};
+
+	vop_mmu: iommu@10118300 {
+		compatible = "rockchip,iommu";
+		reg = <0x10118300 0x100>;
+		interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "vop_mmu";
+		#iommu-cells = <0>;
+		status = "disabled";
+	};
+
 	gic: interrupt-controller@10139000 {
 		compatible = "arm,gic-400";
 		interrupt-controller;