+define MkImageTrx/squashfs
+ $(eval output_name=$(IMG_PREFIX)-$(2)-$(1)-$(if $(4),$(4),sysupgrade).bin)
+ $(STAGING_DIR_HOST)/bin/trx \
+ -o $(KDIR)/$(output_name) \
+ -m $(3) \
+ -f $(KDIR)/vmlinux-$(2).uImage \
+ -a 4 -f $(KDIR)/root.$(1)
+ $(call prepare_generic_squashfs,$(KDIR)/$(output_name))
+ $(CP) $(KDIR)/$(output_name) $(BIN_DIR)/$(output_name)
+endef
+
+define MkImageTpl/squashfs
+ $(eval output_name=$(IMG_PREFIX)-$(2)-$(1)-$(if $(4),$(4),sysupgrade).bin)
+ $(STAGING_DIR_HOST)/bin/mktplinkfw2 -V "ver. 2.0" -B "$(2)" -j \
+ -o $(KDIR)/$(output_name) \
+ -k $(KDIR)/vmlinux-$(1)$(4).bin.lzma \
+ -r $(KDIR)/root.$(1)
+ $(CP) $(KDIR)/$(output_name) $(BIN_DIR)/$(output_name)
+endef
+
+define MkImageTpl/initramfs
+ $(eval output_name=$(IMG_PREFIX)-$(2)-$(1).bin)
+ $(STAGING_DIR_HOST)/bin/mktplinkfw2 -V "ver. 2.0" -B "$(2)" -c \
+ -o $(KDIR)/$(output_name) \
+ -k $(KDIR)/vmlinux-$(1).bin.lzma
+ $(CP) $(KDIR)/$(output_name) $(BIN_DIR)/$(output_name)
+endef
+
+# $(1), lowercase board name like "mt7620a_v22sg"
+# $(2), DTS filename without .dts extension
+# $(3), optional filename suffix, e.g. "-initramfs"