ARM: dts: r8a7744: Add GPIO support

Describe GPIO blocks in the R8A7744 device tree.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7744.dtsi

@@ -116,29 +116,123 @@ soc {
 		ranges;
 
 		gpio0: gpio@e6050000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
 			reg = <0 0xe6050000 0 0x50>;
+			interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
 			#gpio-cells = <2>;
+			gpio-controller;
+			gpio-ranges = <&pfc 0 0 32>;
 			#interrupt-cells = <2>;
 			interrupt-controller;
-			/* placeholder */
+			clocks = <&cpg CPG_MOD 912>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 912>;
 		};
 
 		gpio1: gpio@e6051000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
 			reg = <0 0xe6051000 0 0x50>;
+			interrupts = <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>;
 			#gpio-cells = <2>;
-			/* placeholder */
+			gpio-controller;
+			gpio-ranges = <&pfc 0 32 26>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 911>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 911>;
 		};
 
 		gpio2: gpio@e6052000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
 			reg = <0 0xe6052000 0 0x50>;
+			interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
 			#gpio-cells = <2>;
-			/* placeholder */
+			gpio-controller;
+			gpio-ranges = <&pfc 0 64 32>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 910>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 910>;
+		};
+
+		gpio3: gpio@e6053000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
+			reg = <0 0xe6053000 0 0x50>;
+			interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
+			#gpio-cells = <2>;
+			gpio-controller;
+			gpio-ranges = <&pfc 0 96 32>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 909>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 909>;
+		};
+
+		gpio4: gpio@e6054000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
+			reg = <0 0xe6054000 0 0x50>;
+			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
+			#gpio-cells = <2>;
+			gpio-controller;
+			gpio-ranges = <&pfc 0 128 32>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 908>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 908>;
+		};
+
+		gpio5: gpio@e6055000 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
+			reg = <0 0xe6055000 0 0x50>;
+			interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+			#gpio-cells = <2>;
+			gpio-controller;
+			gpio-ranges = <&pfc 0 160 32>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 907>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 907>;
 		};
 
 		gpio6: gpio@e6055400 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
 			reg = <0 0xe6055400 0 0x50>;
+			interrupts = <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
 			#gpio-cells = <2>;
-			/* placeholder */
+			gpio-controller;
+			gpio-ranges = <&pfc 0 192 32>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 905>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 905>;
+		};
+
+		gpio7: gpio@e6055800 {
+			compatible = "renesas,gpio-r8a7744",
+				     "renesas,rcar-gen2-gpio";
+			reg = <0 0xe6055800 0 0x50>;
+			interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+			#gpio-cells = <2>;
+			gpio-controller;
+			gpio-ranges = <&pfc 0 224 26>;
+			#interrupt-cells = <2>;
+			interrupt-controller;
+			clocks = <&cpg CPG_MOD 904>;
+			power-domains = <&sysc R8A7744_PD_ALWAYS_ON>;
+			resets = <&cpg 904>;
 		};
 
 		pfc: pin-controller@e6060000 {