> > > > +static const char *cin_text[] = { > > > > + "ADC", "DMIC" > > > > +}; > > > > +static SOC_ENUM_SINGLE_DECL(cin_enum, > > > > + WM8904_DIGITAL_MICROPHONE_0, 12, cin_text); > > > Why would this be runtime selectable? I'd expect the decision to use > > > an analogue or digital microphone to be made in the hardware design. > > I agree that dedicated HW is required, but currently SW side there's no support at all. > > This patch is aiming to provide a way to enable DMIC on boards using it. > > Is this supposed to be managed in a different way ? > Via firmware description. Can you please provide any reference approach in the kernel code ?