Well, but where this default specified ?
I mean on Power On how BBB "knows" that P.9.31 is reserved for audio ?
This default meaning is specified somewhere in device tree, isn't it ?
Regards.

On Tuesday, September 15, 2020 at 4:34:39 PM UTC+2, RobertCNelson wrote:
>
> On Tue, Sep 15, 2020 at 9:32 AM Pavel Yermolenko <[email protected] 
> <javascript:>> wrote: 
> > 
> > Thanks ! 
> > The defaults are specified probably in one of .dts (or .dtsi) files. 
> Which one ? 
>
> It's lots of overlays: adc, hdmi, hdmi-audio, emmc, wireless, etc.. 
>
>
> https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#U-Boot_Disable_on-board_devices
>  
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/ 
>

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