ARM: dts: exynos5420: add mali dt node and enable mali on Odroid XU3/4

Add device tree node for Mali GPU for Exynos 542x SoC.
GPU is disabled by default, and is enabled for each board after the
regulator is defined. Tested on Odroid-XU4.

Signed-off-by: Marian Mihailescu <mihailescu2m@gmail.com>

arch/arm/boot/dts/exynos5420.dtsi

@@ -670,6 +670,56 @@
 			iommus = <&sysmmu_gscl1>;
 		};
 
+		gpu: gpu@11800000 {
+			compatible = "samsung,exynos5420-mali", "arm,mali-t628";
+			reg = <0x11800000 0x5000>;
+			interrupts = <GIC_SPI 219 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "job", "mmu", "gpu";
+
+			clocks = <&clock CLK_G3D>;
+			clock-names = "core";
+			power-domains = <&g3d_pd>;
+			operating-points-v2 = <&gpu_opp_table>;
+
+			status = "disabled";
+			#cooling-cells = <2>;
+
+			gpu_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-177000000 {
+					opp-hz = /bits/ 64 <177000000>;
+					opp-microvolt = <812500>;
+				};
+				opp-266000000 {
+					opp-hz = /bits/ 64 <266000000>;
+					opp-microvolt = <862500>;
+				};
+				opp-350000000 {
+					opp-hz = /bits/ 64 <350000000>;
+					opp-microvolt = <912500>;
+				};
+				opp-420000000 {
+					opp-hz = /bits/ 64 <420000000>;
+					opp-microvolt = <962500>;
+				};
+				opp-480000000 {
+					opp-hz = /bits/ 64 <480000000>;
+					opp-microvolt = <1000000>;
+				};
+				opp-543000000 {
+					opp-hz = /bits/ 64 <543000000>;
+					opp-microvolt = <1037500>;
+				};
+				opp-600000000 {
+					opp-hz = /bits/ 64 <600000000>;
+					opp-microvolt = <1150000>;
+				};
+			};
+		};
+
 		scaler_0: scaler@12800000 {
 			compatible = "samsung,exynos5420-scaler";
 			reg = <0x12800000 0x1294>;

arch/arm/boot/dts/exynos5422-odroid-core.dtsi

@@ -522,7 +522,6 @@
 				regulator-name = "vdd_g3d";
 				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1400000>;
-				regulator-always-on;
 				regulator-boot-on;
 
 				regulator-state-mem {
@@ -654,6 +653,11 @@
 	vtmu-supply = <&ldo7_reg>;
 };
 
+&gpu {
+	mali-supply = <&buck4_reg>;
+	status = "okay";
+};
+
 &rtc {
 	status = "okay";
 	clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;