AMD CZ support for RT5645

modulename: snd-soc-acp-rt5645-mach.ko

configname: CONFIG_SND_SOC_AMD_CZ_RT5645_MACH

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>AMD CZ support for RT5645
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This option enables machine driver for rt5645.

source code: