Zygmunt Bazyli Krynicki

@Meulengracht is this ready for landing?

@degville shall I write a documentation snippet about this interface on the forum?

@mardy the relation between the (so far missing) `pwm-control` and `pwm` is the same as between `gpio-contrl` (existing) and `gpio`. It mainly depends on how the application was written to...

> > @degville shall I write a documentation snippet about this interface on the forum? > > Yes please! I'll edit it there if needed. I think it's great to...

Please hold on with merging this. I had to apply one more change for this to _really_ work. I totally missed the fact that sysfs is full of symlinks. I...

I'll pick this up mid next week. I have an urgent thing to address outside of the scope of snapd.

I still have a few things to do but I will push an update with the new look of the code for possible feedback.

This needs re-design to avoid the problem of symlinks and apparmor.

Please rebase/merge master to get accurate tests

I should have noticed the 🎂🎂 @alexmurray do you plan on rebasing this or should I take over?