1. 根目录:
2. sound
3. soc
4. nuc900
5. Makefile

# NUC900 series audio
snd-soc-nuc900-pcm-objs := nuc900-pcm.o
snd-soc-nuc900-ac97-objs := nuc900-ac97.o

obj-$(CONFIG_SND_SOC_NUC900) += snd-soc-nuc900-pcm.o
obj-$(CONFIG_SND_SOC_NUC900_AC97) += snd-soc-nuc900-ac97.o

# Boards
snd-soc-nuc900-audio-objs := nuc900-audio.o

obj-$(CONFIG_SND_SOC_NUC900EVB) += snd-soc-nuc900-audio.o