一、内核文档 Linux Sound Subsystem Documentation
二、一些API
6、snd_soc_add_component_controls
8、snd_soc_add_platform_controls
14、snd_soc_dapm_kcontrol_widget
四、Dynamic Audio Power Management for Portable Devices
六、Proc interfaces (/proc/asound)
八、PCM (digital audio) interface
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