Intel AG6XX protocol support

configname: CONFIG_BT_HCIUART_AG6XX

Linux Kernel Configuration
└─>Networking support
└─>Bluetooth subsystem support
└─>Bluetooth device drivers
└─>Intel AG6XX protocol support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
The Intel/AG6XX protocol support enables Bluetooth HCI over serial
port interface for Intel ibt 2.1 Bluetooth controllers.

Say Y here to compile support for Intel AG6XX protocol.