SoC Audio support for STM32 DFSDM

modulename: stm32_adfsdm.ko

configname: CONFIG_SND_SOC_STM32_DFSDM

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>STMicroelectronics STM32 SOC audio support
└─>SoC Audio support for STM32 DFSDM
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Select this option to enable the STM32 Digital Filter
for Sigma Delta Modulators (DFSDM) driver used
in various STM32 series for digital microphone capture.

source code:
sound/soc//stm/stm32_adfsdm.c