I2S alsa device drivers for the popular MIPS ar9331 SOC (Carambola2, Arduino Yun...)
It is implemented as a openwrt package and can be compiled with Linux Kernel Ver. 3.14.xx and above.
cd ~/Chaos_Calme/package/kernel
git clone https://github.com/sonnyyu/ar9331-i2s-alsa.git
cd ~/Chaos_Calme/
make menuconfig
PACKAGE_kmod-ath79-pcm
PACKAGE_kmod-ath79-i2s
PACKAGE_kmod-ath79-i2s-dev
PACKAGE_kmod-ath79-wm8727
PACKAGE_kmod-ath79-carambola2
make sure above module select.
make -j 5 V=s
GPIO18~GPIO21
