[
[ "case", "ACTION", {
"add": [
[ "if",
[ "has", "FIRMWARE" ],
[ "exec", "/sbin/hotplug-call", "%SUBSYSTEM%" ],
[ "load-firmware", "/lib/firmware" ],
[ "return" ]
]
} ],
[ "eq", "SUBSYSTEM", "button" ],
[ "exec", "/etc/rc.button/failsafe" ]