d76934daeb
USB Audio Class 2 (UAC2) includes a method to describe audio device topology to host using a set of class specific descriptors. The audio device description includes complete sample clock topology and audio processing organization. Zephyr specific bindings are supposed to allow user to create reasonably simple audio device description using devicetree syntax. The bindings currently include only the absolute minimum set required for headset example. Bindings for other entities (Clock Selector, Clock Multiplier, Mixer Unit, Selector Unit, Feature Unit, Sample Rate Converter, variuos Effect Units, various Processing Units, Extension Unit) can be added later together with the actual USB class implementation. The main idea is that user does create one zephyr,uac2 compatible node for every USB Audio 2 class instance. Note that in majority of cases just one USB Audio 2 class is necessary because the number of streaming interfaces is virtually unlimited (USB Audio 2 class can have up to 255 entities). The zephyr,uac2 node includes child nodes with compatibles set to desired entity or audiostreaming interface. The parent-child relationship is necessary to allow grouping entities to correct audio class instance. Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no> |
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| .. | ||
| audio.h | ||
| usb.h | ||