buildroot/board/kontron/bl-imx8mm/genimage.cfg

image sdcard.img {
	hdimage {
		partition-table-type = "gpt"
		gpt-location = 16K
	}

	partition imx-boot {
		in-partition-table = "no"
		image = "flash.bin"
		offset = 33K
	}

	partition rootfs {
		image = "rootfs.ext4"
		offset = 8M
		partition-uuid = %PARTUUID%
	}
}