ARM: dts: rockchip: add ARM Mali GPU node for rk3288

Add Mali GPU device tree node for the rk3288 SoC, with devfreq
opp table.
Signed-off-by: NGuillaume Tucker <guillaume.tucker@collabora.com>
Tested-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -43,6 +43,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/clock/rk3288-cru.h>
+#include <dt-bindings/power/rk3288-power.h>
 #include <dt-bindings/thermal/thermal.h>
 #include <dt-bindings/power/rk3288-power.h>
 #include <dt-bindings/soc/rockchip,boot-mode.h>
@@ -1125,6 +1126,48 @@
 		};
 	};
 
+	gpu: mali@ffa30000 {
+		compatible = "rockchip,rk3288-mali", "arm,mali-t760", "arm,mali-midgard";
+		reg = <0xffa30000 0x10000>;
+		interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "job", "mmu", "gpu";
+		clocks = <&cru ACLK_GPU>;
+		operating-points-v2 = <&gpu_opp_table>;
+		power-domains = <&power RK3288_PD_GPU>;
+		status = "disabled";
+	};
+
+	gpu_opp_table: gpu-opp-table {
+		compatible = "operating-points-v2";
+
+		opp@100000000 {
+			opp-hz = /bits/ 64 <100000000>;
+			opp-microvolt = <950000>;
+		};
+		opp@200000000 {
+			opp-hz = /bits/ 64 <200000000>;
+			opp-microvolt = <950000>;
+		};
+		opp@300000000 {
+			opp-hz = /bits/ 64 <300000000>;
+			opp-microvolt = <1000000>;
+		};
+		opp@400000000 {
+			opp-hz = /bits/ 64 <400000000>;
+			opp-microvolt = <1100000>;
+		};
+		opp@500000000 {
+			opp-hz = /bits/ 64 <500000000>;
+			opp-microvolt = <1200000>;
+		};
+		opp@600000000 {
+			opp-hz = /bits/ 64 <600000000>;
+			opp-microvolt = <1250000>;
+		};
+	};
+
 	qos_gpu_r: qos@ffaa0000 {
 		compatible = "syscon";
 		reg = <0xffaa0000 0x20>;