vcnl4040: close / not close trigger
The driver needs more work for proper proximity support. iio-sensor-proxy upstream prefers a boolean (close / not close) intead of raw values. We can make the driver trigger on proximity then which also saves power if the trigger is only enabled from userspace when needed. I had a short look already and Tomas Novotny is currently working on making the resolution configurable (which again saves power).