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驱动组成部分
ASoCsplits an embedded audio system into 3 components :-
* Codec driver: The codec driver is platformindependent and contains audio
controls, audio interface capabilities,codec DAPM definition and codec IO
functions.
* Platform driver: The platform drivercontains the audio DMA engine and audio interface drivers (e.g. I2S, AC97, PCM) for that platform.
* Machine driver: The machine driver handlesany machine specific controls and audio events (e.g. turning on an amp at startof playback).
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驱动文件组成
AD1938 with ASoC
Codec
AD1938 codec driver:
sound/soc/codecs/ad1938.h
sound/soc/codecs/ad1938.c
Platform
TDM DAI driver:
sound/soc/blackfin/bf5xx-tdm.h
sound/soc/blackfin/bf5xx-tdm.c
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TDM PCM (DMA) driver:
sound/soc/blackfin/bf5xx-tdm-pcm.h
sound/soc/blackfin/bf5xx-tdm-pcm.c
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SPORT interface driver:
sound/soc/blackfin/bf5xx-sport.h
sound/soc/blackfin/bf5xx-sport.c
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Board
Machine (Board) driver:
sound/soc/blackfin/bf5xx-ad1938.c
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SPI board info:
Add related information to arch/blackfin/mach-xxx/boards/xxx.c
