buildroot/board/bsh/imx8mn-bsh-smm-s2-pro/genimage.cfg

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

	partition imx-boot {
		in-partition-table = "no"
		image = "flash.bin"
		offset = 32K
	}

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