STM32 SAI interface (Serial Audio Interface) support

modulename: snd-soc-stm32-sai-sub.ko

and/or

snd-soc-stm32-sai.ko

configname: CONFIG_SND_SOC_STM32_SAI

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>STMicroelectronics STM32 SOC audio support
└─>Device Tree and Open Firmware support
└─>STM32 SAI interface (Serial Audio Interface) support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y if you want to enable SAI for STM32

source code:
sound/soc//stm/