buildroot/board/seeed/stm32mp157c-odyssey/genimage.cfg

image sdcard.img {
	hdimage {
		gpt = "true"
	}

	partition fsbl1 {
		image = "tf-a-stm32mp157c-odyssey.stm32"
	}

	partition fsbl2 {
		image = "tf-a-stm32mp157c-odyssey.stm32"
	}

	partition ssbl {
		image = "u-boot.stm32"
	}

	partition rootfs {
		image = "rootfs.ext4"
		bootable = "yes"
	}
}