Adding this to my device tree overlay seemed to make /dev/ttyO2 show up:
&uart3 {
  status = "okay";
};

I am not able to receive data, though, only send. Any ideas?

On Thursday, May 14, 2020 at 9:22:07 AM UTC-6, John Allwine wrote:
>
> I'm trying to set up UART3 on the Beaglebone AI to work as a serial port, 
> but I'm not sure what is involved. I configured P9.21b and P9.22b to be in 
> mode 1, which is mapped to uart3_tx and uart3_rx. How do I get those pins 
> bound to a tty device under /dev? Maybe they already are and I don't know 
> which one?
>

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