KT PHd protocol

modulename: ktti.ko

configname: CONFIG_PATA_PARPORT_KTTI

Linux Kernel Configuration
└─>Device Drivers
└─>Serial ATA and Parallel ATA drivers (libata)
└─>KT PHd protocol
In linux kernel since version 6.3 (release Date: 2023-04-23)  
This option enables support for the "PHd" parallel port IDE protocol
from KT Technology. This is a simple (low speed) adapter that is
used in some 2.5" portable hard drives.

source code:
drivers/ata/pata_parport/ktti.c