ramips: improve support for SIM SIMAX1800T and Haier HAR-20S2U1

1. Use ARTIFACTS to build factory image. This change allows users to
   generate initramfs factory image using OpenWrt ImageBuilder.

2. Override the default bootargs property defined in "mt7621.dtsi".
   Although we use the "bootargs-override" property to set bootargs,
   the default "bootargs" property will still be written into the
   device tree, so it is better to override it.

Tested on SIM SIMAX1800T

Signed-off-by: Shiji Yang <[email protected]>

target/linux/ramips/dts/mt7621_haier-sim_wr1800k.dtsi

@@ -16,6 +16,7 @@
 	};
 
 	chosen {
+		bootargs = "console=ttyS0,115200";
 		bootargs-override = "console=ttyS0,115200";
 	};
 

target/linux/ramips/image/mt7621.mk

@@ -38,15 +38,13 @@ define Build/h3c-blank-header
 endef
 
 define Build/haier-sim_wr1800k-factory
-  -[ -e $(KDIR)/tmp/$(KERNEL_INITRAMFS_IMAGE) ] && \
-  mkdir -p "$(1).tmp" && \
-  $(CP) $(KDIR)/tmp/$(KERNEL_INITRAMFS_IMAGE) "$(1).tmp/UploadBrush-bin.img" && \
-  $(MKHASH) md5 "$(1).tmp/UploadBrush-bin.img" | head -c32 > "$(1).tmp/check_MD5.txt" && \
-  $(TAR) -czf $(1).tmp.tgz -C "$(1).tmp" UploadBrush-bin.img check_MD5.txt && \
-  $(STAGING_DIR_HOST)/bin/openssl aes-256-cbc -e -salt -in $(1).tmp.tgz -out "$(1)" -k QiLunSmartWL && \
-  printf %32s "$(DEVICE_MODEL)" >> "$(1)" && \
-  rm -rf "$(1).tmp" $(1).tmp.tgz && \
-  $(CP) $(1) $(BIN_DIR)/
+  mkdir -p "[email protected]"
+  mv "$@" "[email protected]/UploadBrush-bin.img"
+  $(MKHASH) md5 "[email protected]/UploadBrush-bin.img" | head -c32 > "[email protected]/check_MD5.txt"
+  $(TAR) -czf "[email protected]" -C "[email protected]" UploadBrush-bin.img check_MD5.txt
+  $(STAGING_DIR_HOST)/bin/openssl aes-256-cbc -e -salt -in "[email protected]" -out "$@" -k QiLunSmartWL
+  printf %32s $(DEVICE_MODEL) >> "$@"
+  rm -rf "[email protected]" "[email protected]"
 endef
 
 define Build/iodata-mstc-header
@@ -904,8 +902,11 @@ define Device/haier-sim_wr1800k
   KERNEL_LOADADDR := 0x82000000
   KERNEL := kernel-bin | relocate-kernel 0x80001000 | lzma | \
 	fit lzma $$(KDIR)/image-$$(firstword $$(DEVICE_DTS)).dtb
-  KERNEL_INITRAMFS := $$(KERNEL) | \
-	haier-sim_wr1800k-factory $(KDIR)/tmp/$$(KERNEL_INITRAMFS_PREFIX)-factory.bin
+ifneq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),)
+  ARTIFACTS := initramfs-factory.bin
+  ARTIFACT/initramfs-factory.bin := append-image-stage initramfs-kernel.bin | \
+	haier-sim_wr1800k-factory
+endif
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   DEVICE_PACKAGES := kmod-mt7915e uboot-envtools
 endef