CONFIG_NFC_ST21NFCA (not configurable)

modulename: st21nfca_hci.ko

configname: CONFIG_NFC_ST21NFCA

Linux Kernel Configuration
└─>Networking support
└─>NFC subsystem support
└─>Near Field Communication (NFC) devices
└─>NFC_ST21NFCA
In linux kernel since version 3.16 (release Date: 2014-08-03)  
STMicroelectronics ST21NFCA core driver. It implements the chipset
HCI logic and hooks into the NFC kernel APIs. Physical layers will
register against it.

source code: