Upgrade via sysupgrade mechanism is not possible, so new installation via factory style image is required.
endef
+define Device/buffalo_ls220de
+ $(Device/NAND-128K)
+ DEVICE_VENDOR := Buffalo
+ DEVICE_MODEL := LinkStation LS220DE
+ KERNEL_UBIFS_OPTS = -m $$(PAGESIZE) -e 124KiB -c 172 -x none
+ KERNEL := kernel-bin | append-dtb | uImage none | buffalo-kernel-ubifs
+ KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
+ DEVICE_DTS := armada-370-buffalo-ls220de
+ DEVICE_PACKAGES := \
+ kmod-hwmon-gpiofan kmod-hwmon-drivetemp kmod-linkstation-poweroff \
+ kmod-md-mod kmod-md-raid0 kmod-md-raid1 kmod-md-raid10 kmod-fs-xfs \
+ mdadm mkf2fs e2fsprogs partx-utils
+endef
+TARGET_DEVICES += buffalo_ls220de
+
define Device/buffalo_ls421de
$(Device/NAND-128K)
DEVICE_VENDOR := Buffalo