riscv: dts: spacemit: k3: add GPIO support

Add GPIO node in the Device Tree, so devices are able to request GPIO
resource properly.

Link: https://lore.kernel.org/r/20260304-01-dts-uart-full-v1-3-50a0aa53a245@kernel.org
Signed-off-by: Yixun Lan <dlan@kernel.org>

Author: Yixun Lan

arch/riscv/boot/dts/spacemit/k3.dtsi

@@ -536,6 +536,24 @@
 			status = "disabled";
 		};
 
+		gpio: gpio@d4019000 {
+			compatible = "spacemit,k3-gpio";
+			reg = <0x0 0xd4019000 0x0 0x100>;
+			clocks = <&syscon_apbc CLK_APBC_GPIO>,
+				 <&syscon_apbc CLK_APBC_GPIO_BUS>;
+			clock-names = "core", "bus";
+			gpio-controller;
+			#gpio-cells = <3>;
+			interrupts = <58 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&saplic>;
+			interrupt-controller;
+			#interrupt-cells = <3>;
+			gpio-ranges = <&pinctrl 0 0 0 32>,
+				      <&pinctrl 1 0 32 32>,
+				      <&pinctrl 2 0 64 32>,
+				      <&pinctrl 3 0 96 32>;
+		};
+
 		pinctrl: pinctrl@d401e000 {
 			compatible = "spacemit,k3-pinctrl";
 			reg = <0x0 0xd401e000 0x0 0x1000>;