[alsa-devel] [PATCH 00/10] mfd: Add support for Analog Devices A2B transceiver

[Pierre-Louis Bossart]

> Transceivers can both receive and provide audio, and streams can be
> routed from one node to any other, including many others. The tricky
> bit is how to expose the audio routing in DT in a sane way.
> The way it is implemented here, the slave nodes specify the number of
> slots they each consume and generate, and which thereof they forward
> from one side to the other. This mimics the internal register
> structure and should allow for even exotic setups.

It was my understanding that the A2B bus is bidirectional but with 
separate time windows allocated for host->device and device->host 
transmission. The wording seems to hint at device-to-device 
communication but I wonder if this is really what you meant.