What is it

Companion module to [[f21pro-keylayout]]. The F21 Pro has a hardware backlight for its keypad, in a GSI there’s no userspace code to actually enable it.

This module hooks into the existing sysfs node for the keypad LED so the backlight comes on when the screen is on (and turns off with it), the way the stock firmware does.

Why

Lights off = can’t see keys :(