Basic question about kernel modules

ROCK 4 Series
8

Currently the I2S on ROCK Pi 4 working only in master mode, which means WM8731 works in slave mode. You can refer what we’ve done with hifiberry DAC.

kernel/arch/arm64/boot/dts/rockchip/overlays-rockpi4/hifiberry-dac-overlay.dts at release-4.4-rockpi4 · radxa/kernel · GitHub