According to the thread https://forum.openwrt.org/viewtopic.php?id=48281
b53 uses GPIO 7:
[ 4.470000] b53_common: [DBG] b53_switch_reset_gpio using 7
and causes device to self-reboot. GPIO 8 was found in CFE boot log:
"Reset switch via GPIO 8 ..."
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41526 3c298f89-4303-0410-b956-a3cf2f4a3e73