Front panel LED support for PC Engines APU/APU2/APU3 boards

modulename: leds-apu.ko

configname: CONFIG_LEDS_APU

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>Front panel LED support for PC Engines APU/APU2/APU3 boards
In linux kernel since version 4.2 (release Date: 2015-08-30)  
This driver makes the PC Engines APU1 front panel LEDs
accessible from userspace programs through the LED subsystem.

If you're looking for APU2/3, use the pcengines-apu2 driver.
(symbol CONFIG_PCENGINES_APU2)

To compile this driver as a module, choose M here: the
module will be called leds-apu.

source code: