ACPI firmware driver for PATA

modulename: pata_acpi.ko

configname: CONFIG_PATA_ACPI

Linux Kernel Configuration
└─>Device Drivers
└─>Serial ATA and Parallel ATA drivers (libata)
└─>ACPI firmware driver for PATA
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
This option enables an ACPI method driver which drives
motherboard PATA controller interfaces through the ACPI
firmware in the BIOS. This driver can sometimes handle
otherwise unsupported hardware.

source code:
drivers/ata/pata_acpi.c