ARM: dts: exynos: Add GPU/Mali 400 node to Exynos4

Add nodes for GPU (Mali 400) to Exynos4210 and Exynos4412. Describe the
GPU as much as possible however still few elements are missing:
1. Exynos4210 bus clock is not described in hardware manual therefore
the IP gate clock was provided,
2. Exynos4412: Not sure what to do with CLK_G3D clock responsible for
gating entire IP block (it is now being disabled as unused),
3. Regulator supplies on Trats board.

Limited testing on Odroid U3 (Exynos4412).

Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/exynos4.dtsi

···
 		serial3 = &serial_3;
 	};
 
+	gpu: gpu@13000000 {
+		compatible = "samsung,exynos4210-mali", "arm,mali-400";
+		reg = <0x13000000 0x10000>;
+		interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 124 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "gp",
+				  "gpmmu",
+				  "pp0",
+				  "ppmmu0",
+				  "pp1",
+				  "ppmmu1",
+				  "pp2",
+				  "ppmmu2",
+				  "pp3",
+				  "ppmmu3",
+				  "pmu";
+		/*
+		 * CLK_G3D is not actually bus clock but a IP-level clock.
+		 * The bus clock is not described in hardware manual.
+		 */
+		clocks = <&clock CLK_G3D>,
+			 <&clock CLK_SCLK_G3D>;
+		clock-names = "bus", "core";
+		power-domains = <&pd_g3d>;
+		status = "disabled";
+	};
+
 	pmu: pmu {
 		compatible = "arm,cortex-a9-pmu";
 		interrupt-parent = <&combiner>;

arch/arm/boot/dts/exynos4210-origen.dts

···
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&buck3_reg>;
+	status = "okay";
+};
+
 &hsotg {
 	vusb_d-supply = <&ldo3_reg>;
 	vusb_a-supply = <&ldo8_reg>;

arch/arm/boot/dts/exynos4210-trats.dts

···
 	status = "okay";
 };
 
+&gpu {
+	status = "okay";
+};
+
 &hsotg {
 	vusb_d-supply = <&vusb_reg>;
 	vusb_a-supply = <&vusbdac_reg>;

arch/arm/boot/dts/exynos4210-universal_c210.dts

···
 	};
 };
 
+&gpu {
+	mali-supply = <&buck2_reg>;
+	status = "okay";
+};
+
 &hdmi {
 	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";

arch/arm/boot/dts/exynos4210.dtsi

···
 	samsung,lcd-wb;
 };
 
+&gpu {
+	operating-points-v2 = <&gpu_opp_table>;
+
+	gpu_opp_table: opp_table {
+		compatible = "operating-points-v2";
+
+		opp-160000000 {
+			opp-hz = /bits/ 64 <160000000>;
+			opp-microvolt = <950000>;
+		};
+		opp-267000000 {
+			opp-hz = /bits/ 64 <267000000>;
+			opp-microvolt = <1050000>;
+		};
+	};
+};
+
 &mdma1 {
 	power-domains = <&pd_lcd0>;
 };

arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi

···
 	cpu0-supply = <&buck2_reg>;
 };
 
+&gpu {
+	mali-supply = <&buck4_reg>;
+	status = "okay";
+};
+
 &hsotg {
 	vusb_d-supply = <&ldo15_reg>;
 	vusb_a-supply = <&ldo12_reg>;

arch/arm/boot/dts/exynos4412-midas.dtsi

···
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&buck4_reg>;
+	status = "okay";
+};
+
 &hdmi {
 	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";

arch/arm/boot/dts/exynos4412-odroid-common.dtsi

···
 	assigned-clock-rates = <0>, <176000000>;
 };
 
+&gpu {
+	mali-supply = <&buck4_reg>;
+	status = "okay";
+};
+
 &hdmi {
 	hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
 	pinctrl-names = "default";

arch/arm/boot/dts/exynos4412-prime.dtsi

···
 	cooling-device = <&cpu0 15 15>, <&cpu1 15 15>,
 			 <&cpu2 15 15>, <&cpu3 15 15>;
 };
+
+&gpu_opp_table {
+	opp-533000000 {
+		opp-hz = /bits/ 64 <533000000>;
+		opp-microvolt = <1075000>;
+	};
+};

arch/arm/boot/dts/exynos4412.dtsi

···
 	cpu-offset = <0x4000>;
 };
 
+&gpu {
+	operating-points-v2 = <&gpu_opp_table>;
+
+	gpu_opp_table: opp_table {
+		compatible = "operating-points-v2";
+
+		opp-160000000 {
+			opp-hz = /bits/ 64 <160000000>;
+			opp-microvolt = <875000>;
+		};
+		opp-267000000 {
+			opp-hz = /bits/ 64 <267000000>;
+			opp-microvolt = <900000>;
+		};
+		opp-350000000 {
+			opp-hz = /bits/ 64 <350000000>;
+			opp-microvolt = <950000>;
+		};
+		opp-440000000 {
+			opp-hz = /bits/ 64 <440000000>;
+			opp-microvolt = <1025000>;
+		};
+	};
+};
+
 &hdmi {
 	compatible = "samsung,exynos4212-hdmi";
 };