Can't find axp209 in sysfs

Hi Guys,

a few weeks ago, I implemented a project wich reads the power sources of my Banana Pi. I was using /sys/power/axp_pmu/. 

I now made a new build to enable lcd display and such things. But now /sys/power/axp_pmu/ isn't there. Also can't find it anywhere in my system.

Only /sys/power/{pm_async, pm_freeze_timeout, state, wakeup_count}

Kernel of new build is 4.8.0

What have I to do, to get axp_pmu back?

Martin