arch/arm64/boot/dts/freescale/fsl-imx8mm-columbia-m2.dts

// Set Columbia M2 edgetpu card interface.
/dts-v1/;
/plugin/;

/ {
	compatible = "fsl,imx8mm-columbia";

	fragment@0 {
		target = <&pinctrl_pcie0>;
			__overlay__ {
				fsl,pins = <
					0x22c 0x494 0x524 0x12 0x0 0x61  /* MX8MM_IOMUXC_I2C4_SCL_PCIE1_CLKREQ_B */
					0x058 0x2c0 0x000 0x0 0x0 0x51  /* MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12 as APEX_SYS_RST_L for M2 */
					>;
			};
	};

	fragment@1 {
		target = <&pcie0>;
			__overlay__ {
				reset-gpio = <&gpio1 12 1>;  // GPIO_ACTIVE_LOW
			};
	};
};