ARM: dts: Add RDA8810PL GPIO controllers

Add GPIO controllers for RDA8810PL SoC. There are 4 GPIO controllers
in this SoC with maximum of 32 gpios. Except GPIOC, all controllers
are capable of generating edge/level interrupts from first 8 lines.

Link: https://lore.kernel.org/r/20191030101154.6312-2-manivannan.sadhasivam@linaro.orgSigned-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/rda8810pl.dtsi

@@ -33,6 +33,21 @@ sram@100000 {
 		ranges;
 	};
 
+	modem@10000000 {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x10000000 0xfffffff>;
+
+		gpioc@1a08000 {
+			compatible = "rda,8810pl-gpio";
+			reg = <0x1a08000 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <32>;
+		};
+	};
+
 	apb@20800000 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -60,6 +75,39 @@ timer@10000 {
 				     <17 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "hwtimer", "ostimer";
 		};
+
+		gpioa@30000 {
+			compatible = "rda,8810pl-gpio";
+			reg = <0x30000 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <32>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+			interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		gpiob@31000 {
+			compatible = "rda,8810pl-gpio";
+			reg = <0x31000 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <32>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+			interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
+		};
+
+		gpiod@32000 {
+			compatible = "rda,8810pl-gpio";
+			reg = <0x32000 0x1000>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			ngpios = <32>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+			interrupts = <14 IRQ_TYPE_LEVEL_HIGH>;
+		};
 	};
 
 	apb@20a00000 {