layerscape: ls10121frdm: add sysupgrade

Instead of dangerous rewriting full chip with firmware.bin image to
update OpenWrt, add sysupgrade image. This image will be used to update
kernel and rootfs, leaving bootloader intact and making recovery
possible, without resorting to external hardware tools.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>

target/linux/layerscape/base-files/lib/upgrade/platform.sh

@@ -32,6 +32,9 @@ platform_check_image() {
 		nand_do_platform_check "traverse-ls1043" $1
 		return $?
 		;;
+	fsl,ls1012a-frdm)
+		return 0
+		;;
 	*)
 		echo "Sysupgrade is not currently supported on $board"
 		;;
@@ -51,6 +54,10 @@ platform_do_upgrade() {
 	traverse,ls1043s)
 		platform_do_upgrade_traverse_nandubi "$1"
 		;;
+	fsl,ls1012a-frdm)
+		PART_NAME=firmware
+		default_do_upgrade "$1"
+		;;
 	*)
 		echo "Sysupgrade is not currently supported on $board"
 		;;

target/linux/layerscape/image/armv8_64b.mk

@@ -25,6 +25,7 @@ define Device/ls1012afrdm
   DEVICE_DTS := freescale/fsl-ls1012a-frdm
   BLOCKSIZE := 256KiB
   FILESYSTEMS := squashfs
+  IMAGES += sysupgrade.bin
   IMAGE/firmware.bin := \
     ls-clean | \
     ls-append $(1)-bl2.pbl | pad-to 1M | \
@@ -34,8 +35,11 @@ define Device/ls1012afrdm
     ls-append-dtb $$(DEVICE_DTS) | pad-to 16M | \
     append-kernel | pad-to $$(BLOCKSIZE) | \
     append-rootfs | pad-rootfs | check-size 67108865
+  IMAGE/sysupgrade.bin := append-kernel | pad-to $$(BLOCKSIZE) | \
+	append-rootfs | pad-rootfs | check-size 50331648 | append-metadata
   KERNEL := kernel-bin | gzip | fit gzip $$(DTS_DIR)/$$(DEVICE_DTS).dtb
   KERNEL_INITRAMFS := kernel-bin | fit none $$(DTS_DIR)/$$(DEVICE_DTS).dtb
+  SUPPORTED_DEVICES := fsl,ls1012a-frdm
 endef
 TARGET_DEVICES += ls1012afrdm