target/linux/orion: create subtargets (closes #8154)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23883 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/orion/generic/base-files/lib/upgrade/platform.sh

@@ -0,0 +1,31 @@
+# use default "image" for PART_NAME
+# use default for platform_do_upgrade()
+
+platform_check_image() {
+	[ "${ARGC}" -gt 1 ] && { echo 'Too many arguments. Only flash file expected.'; return 1; }
+
+	local hardware=`sed -n /Hardware/s/.*:.//p /proc/cpuinfo`
+	local magic="$(get_magic_word "$1")"
+
+	case "${hardware}" in
+	 # hardware with padded uImage + padded rootfs
+	 'Linksys WRT350N v2')
+		[ "${magic}" != '2705' ] && {
+			echo "Invalid image type ${magic}."
+			return 1
+		}
+		return 0
+		;;
+	 # Netgear WNR854T has extra header before uImage
+	 'Netgear WNR854T')
+		[ "${magic}" != '8519' ] && {
+			echo "Invalid image type ${magic}."
+			return 1
+		}
+		return 0
+		;;
+	esac
+
+	echo "Sysupgrade is not yet supported on ${hardware}."
+	return 1
+}