On a T20 Linux EVM I need to drive WM9715L headphone outputs with continuous time varying signals; i.e. the ALSA support through audio files is not adequate.
I need a more direct access to WM9715L features: I know that Wolfson has included some drivers in the Linux kernel, but I could not find any documentation or example of usage.
The minimal example should be : how to send by DMA 48 kHz samples to WM9715L heaphone outputs.
I hope that somebody will give me a good starting point.
Thank you for your attention.