arm64: dts: mediatek: mt7981: add pinctrl

MT7981 contains on-SoC PIN controller that is also a GPIO provider.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240317223206.22033-4-zajec5@gmail.comSigned-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

arch/arm64/boot/dts/mediatek/mt7981b.dtsi

@@ -86,6 +86,28 @@ pwm@10048000 {
 			#pwm-cells = <2>;
 		};
 
+		pio: pinctrl@11d00000 {
+			compatible = "mediatek,mt7981-pinctrl";
+			reg = <0 0x11d00000 0 0x1000>,
+			      <0 0x11c00000 0 0x1000>,
+			      <0 0x11c10000 0 0x1000>,
+			      <0 0x11d20000 0 0x1000>,
+			      <0 0x11e00000 0 0x1000>,
+			      <0 0x11e20000 0 0x1000>,
+			      <0 0x11f00000 0 0x1000>,
+			      <0 0x11f10000 0 0x1000>,
+			      <0 0x1000b000 0 0x1000>;
+			reg-names = "gpio", "iocfg_rt", "iocfg_rm", "iocfg_rb", "iocfg_lb",
+				    "iocfg_bl", "iocfg_tm", "iocfg_tl", "eint";
+			interrupt-controller;
+			interrupts = <GIC_SPI 225 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-parent = <&gic>;
+			gpio-ranges = <&pio 0 0 56>;
+			gpio-controller;
+			#gpio-cells = <2>;
+			#interrupt-cells = <2>;
+		};
+
 		clock-controller@15000000 {
 			compatible = "mediatek,mt7981-ethsys", "syscon";
 			reg = <0 0x15000000 0 0x1000>;