ramips: use rootfs splitter and new image build code for BR-6475ND

Use the edimax uImage splitter instead of the fixed size rootfs
partition.

Signed-off-by: Mathias Kresin <dev@kresin.me>

target/linux/ramips/dts/BR-6475ND.dts

@@ -80,11 +80,6 @@
 			reg = <0x00070000 0x00790000>;
 			label = "firmware";
 		};
-
-		partition@170000 {
-			reg = <0x00270000 0x00590000>;
-			label = "rootfs";
-		};
 	};
 
 	rtl8367 {

target/linux/ramips/image/rt3883.mk

@@ -2,6 +2,17 @@
 # RT3662/RT3883 Profiles
 #
 
+define Device/br-6475nd
+  DTS := BR-6475ND
+  BLOCKSIZE := 64k
+  IMAGE_SIZE := 7744k
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | \
+	edimax-header -s CSYS -m RN54 -f 0x70000 -S 0x01100000 | pad-rootfs
+  DEVICE_TITLE := Edimax BR-6475nD
+  DEVICE_PACKAGES := swconfig
+endef
+TARGET_DEVICES += br-6475nd
+
 define Device/cy-swr1100
   DTS := CY-SWR1100
   BLOCKSIZE := 64k
@@ -76,32 +87,6 @@ endef
 TARGET_DEVICES += tew-692gr
 
 
-# $(1) = squashfs/initramfs
-# $(2) = lowercase board name
-# $(3) = dts file
-# $(4) = kernel size
-# $(5) = rootfs size
-# $(6) = signature
-# $(7) = model
-# $(8) = flash address
-# $(9) = start address
-define BuildFirmware/EdimaxCombined/squashfs
-	$(call PatchKernelLzmaDtb,$(2),$(3))
-	$(call MkImage,lzma,$(KDIR)/vmlinux-$(2).bin.lzma,$(KDIR)/vmlinux-$(2).bin.uImage)
-	if [ `stat -c%s "$(KDIR)/vmlinux-$(2).bin.uImage"` -gt `expr $(4) - 20` ]; then \
-		echo "Warning: $(KDIR)/vmlinux-$(2).bin.uImage is too big" >&2; \
-		exit 1; \
-	else if [ `stat -c%s "$(KDIR)/root.$(1)"` -gt $(5) ]; then \
-		echo "Warning: $(KDIR)/root.$(1) is too big" >&2; \
-		exit 1; \
-	else \
-		( dd if=$(KDIR)/vmlinux-$(2).bin.uImage bs=`expr $(4) - 20` conv=sync ; dd if=$(KDIR)/root.$(1) ) > $(KDIR)/vmlinux-$(2).bin.uImage.combined ; \
-	fi ; fi
-	mkedimaximg -i "$(KDIR)/vmlinux-$(2).bin.uImage.combined" \
-		-o $(call imgname,$(1),$(2)).bin \
-		-s $(6) -m $(7) -f $(8) -S $(9)
-endef
-
 define BuildFirmware/RTN56U/squashfs
 	$(call BuildFirmware/Default8M/$(1),$(1),rt-n56u,RT-N56U)
 	-mkrtn56uimg -s $(call sysupname,$(1),rt-n56u)
@@ -109,11 +94,7 @@ define BuildFirmware/RTN56U/squashfs
 	-mkrtn56uimg -f $(call imgname,$(1),rt-n56u)-factory.bin
 endef
 
-
 Image/Build/Profile/RTN56U=$(call BuildFirmware/RTN56U/$(1),$(1),rt-n56u,RT-N56U)
-kernel_size_BR6475ND:=2097152
-rootfs_size_BR6475ND:=5832704
-Image/Build/Profile/BR6475ND=$(call BuildFirmware/EdimaxCombined/$(1),$(1),br-6475nd,BR-6475ND,$(kernel_size_BR6475ND),$(rootfs_size_BR6475ND),CSYS,RN54,0x70000,0x01100000)
 
 
 define LegacyDevice/RTN56U
@@ -122,11 +103,3 @@ define LegacyDevice/RTN56U
   DEVICE_PACKAGES := kmod-usb-core kmod-usb-ohci kmod-usb2 swconfig
 endef
 LEGACY_DEVICES += RTN56U
-
-
-define LegacyDevice/BR6475ND
-  BLOCKSIZE := 64k
-  DEVICE_TITLE := Edimax BR-6475nD
-  DEVICE_PACKAGES := swconfig
-endef
-LEGACY_DEVICES += BR6475ND