ARM: dts: meson8: add the Mali-450 MP6 GPU

Add the Mali-450 GPU and it's OPP table for the Meson8 and Meson8m2 (the
latter inherits meson8.dtsi).
These SoCs have a Mali-450 GPU with six pixel processors. The OPP table
is taken from the 3.10 vendor kernel which uses the following table:
  FCLK_DEV7 | 1,     /* 182.1 Mhz */
  FCLK_DEV4 | 1,     /* 318.7 Mhz */
  FCLK_DEV3 | 1,     /* 425 Mhz */
  FCLK_DEV5 | 0,     /* 510 Mhz */
  FCLK_DEV4 | 0,     /* 637.5 Mhz */
This describes the mux (FCLK_DEVx) and a 0-based divider in the clock
controller. "FCLK" is "fixed_pll" which is running at 2550MHz.
The "turbo" setting is described by "turbo_clock = 4" where 4 is the
index of the table above.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

arch/arm/boot/dts/meson8.dtsi

@@ -166,6 +166,32 @@
 		};
 	};
 
+	gpu_opp_table: gpu-opp-table {
+		compatible = "operating-points-v2";
+
+		opp-182150000 {
+			opp-hz = /bits/ 64 <182150000>;
+			opp-microvolt = <1150000>;
+		};
+		opp-318750000 {
+			opp-hz = /bits/ 64 <318750000>;
+			opp-microvolt = <1150000>;
+		};
+		opp-425000000 {
+			opp-hz = /bits/ 64 <425000000>;
+			opp-microvolt = <1150000>;
+		};
+		opp-510000000 {
+			opp-hz = /bits/ 64 <510000000>;
+			opp-microvolt = <1150000>;
+		};
+		opp-637500000 {
+			opp-hz = /bits/ 64 <637500000>;
+			opp-microvolt = <1150000>;
+			turbo-mode;
+		};
+	};
+
 	pmu {
 		compatible = "arm,cortex-a9-pmu";
 		interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
@@ -208,6 +234,38 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x0 0xd0000000 0x200000>;
+
+		mali: gpu@c0000 {
+			compatible = "amlogic,meson8-mali", "arm,mali-450";
+			reg = <0xc0000 0x40000>;
+			interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 168 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 169 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 172 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 172 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 173 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 175 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 177 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "gp", "gpmmu", "pp", "pmu",
+					  "pp0", "ppmmu0", "pp1", "ppmmu1",
+					  "pp2", "ppmmu2", "pp4", "ppmmu4",
+					  "pp5", "ppmmu5", "pp6", "ppmmu6";
+			resets = <&reset RESET_MALI>;
+			clocks = <&clkc CLKID_CLK81>, <&clkc CLKID_MALI>;
+			clock-names = "bus", "core";
+			operating-points-v2 = <&gpu_opp_table>;
+			switch-delay = <0xffff>;
+		};
 	};
 }; /* end of / */