Instead of writing to the currently booted partition set, this
implements full dual-boot support for sysupgrade by always writing to
the other, currently inactive, partition set and toggling the dualflag
after a successful flash.
The currently active/ booted partition set is determined by parsing
/proc/cmdline for its rootfs parameter (supplied by the DTS), instead
of reading from the 0:DUAL_FLAG mtd, in order to prevent (potentially)
bricking both partition sets.
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
local tar_file=$1
local kernel=$2
local rootfs=$3
local tar_file=$1
local kernel=$2
local rootfs=$3
# keep sure its unbound
losetup --detach-all || {
# keep sure its unbound
losetup --detach-all || {
+ # flashing successful, toggle the dualflag
+ case "$rootfs" in
+ "/dev/mmcblk0p5")
+ printf "\xff" >$dualflagmtd
+ ;;
+ "/dev/mmcblk0p8")
+ printf "\x01" >$dualflagmtd
+ ;;
+ esac
+
# Cleanup
losetup -d $loopdev >/dev/null 2>&1
sync
# Cleanup
losetup -d $loopdev >/dev/null 2>&1
sync
[ -b "${rootfs}" ] || return 1
case "$board" in
zyxel,nbg6817)
[ -b "${rootfs}" ] || return 1
case "$board" in
zyxel,nbg6817)
+ local dualflagmtd="$(find_mtd_part 0:DUAL_FLAG)"
+ [ -b $dualflagmtd ] || return 1
+
case "$rootfs" in
"/dev/mmcblk0p5")
case "$rootfs" in
"/dev/mmcblk0p5")
- kernel="/dev/mmcblk0p4"
+ # booted from the primary partition set
+ # write to the alternative set
+ kernel="/dev/mmcblk0p7"
+ rootfs="/dev/mmcblk0p8"
- kernel="/dev/mmcblk0p7"
+ # booted from the alternative partition set
+ # write to the primary set
+ kernel="/dev/mmcblk0p4"
+ rootfs="/dev/mmcblk0p5"
- zyxel_do_flash $tar_file $kernel $rootfs
+ zyxel_do_flash $tar_file $kernel $rootfs $dualflagmtd