recovery-initramfs-init: add support for ubisysvols

Adapt the format_ubi_volume() function to wipe out UBI volumes
instead of formatting MTD partitions.

Signed-off-by: Hector Palacios <hector.palacios@digi.com>

https://onedigi.atlassian.net/browse/DEL-7614

meta-digi-dey/recipes-core/recovery/recovery-initramfs/recovery-initramfs-init

@@ -231,6 +231,23 @@ format_ubi_volume() {
 	psplash_message "Formatting '${1}' partition..."
 	psplash_progress "0"
 
+	# Read the ubisysvols variable.
+	read_uboot_var ubisysvols ubisysvols
+
+	if [ "${ubisysvols}" = "yes" ]; then
+		# Find the volume number associated to the volume name
+		for d in /dev/ubi0_*; do
+			volname="$(ubinfo ${d} | grep ^Name | awk '{print $(2)}')"
+			if [ "${volname}" = "${1}" ]; then
+				# Find mountpoint
+				mountpoint="$(mount | grep ubi0:${1} | awk '{print $(3) }')"
+				umount ${mountpoint} 2> /dev/null
+				# Wipe out volume
+				ubiupdatevol ${d} -t
+			fi
+		done
+		psplash_progress "100"
+	else
 		# Find the MTD partition.
 		local mtd_num="$(sed -ne "s/mtd\([0-9]\+\):.*\<${1}\>.*/\1/g;T;p" /proc/mtd 2>/dev/null)"
 		if [ -z "${mtd_num}" ]; then
@@ -265,6 +282,7 @@ format_ubi_volume() {
 				quit_with_error "Error creating '${1}' UBI volume"
 			fi
 		fi
+	fi
 }
 
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