LED Disk Trigger

modulename: ledtrig-disk.ko

configname: CONFIG_LEDS_TRIGGER_DISK

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Trigger support
└─>Serial ATA and Parallel ATA drivers (libata)
└─>LED Disk Trigger
In linux kernel since version 4.1 (release Date: 2015-06-21)  
This allows LEDs to be controlled by disk activity.
If unsure, say Y.

source code:
drivers/leds/trigger/ledtrig-disk.c

is depended by
CONFIG_ADB_PMU_LED_DISK