Rockchip SPDIF Device Driver

modulename: snd-soc-rockchip-spdif.ko

configname: CONFIG_SND_SOC_ROCKCHIP_SPDIF

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>Rockchip SPDIF Device Driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Say Y or M if you want to add support for SPDIF driver for
Rockchip SPDIF transceiver device.

source code:
sound/soc//rockchip/