target/linux/mediatek/files-5.4/arch/arm64/boot/dts/mediatek/mt7986b-pinctrl.dtsi

&pio {
	i2c_pins: i2c-pins-3-4 {
		mux {
			function = "i2c";
			groups = "i2c";
		};
	};

	uart1_pins: uart1-pins-23-to-26 {
		mux {
			function = "uart";
			groups = "uart1_1";
		};
	};

	uart2_pins: uart1-pins-29-to-32 {
		mux {
			function = "uart";
			groups = "uart2_0";
		};
	};

	spic_pins: spi1-pins-29-to-32 {
		mux {
			function = "spi";
			groups = "spi1_2";
		};
	};
};