UARTE Baud to non-standard value in Zephyr

[_r_y_a_n]

To setup the UARTE for use in Zephyr I've configured a nrf52840dk_nrf52840.overlay as Zephyr documentation suggests:

&uart1 {

  compatible = "nordic,nrf-uarte";

  current-speed = <1000000>;

  status = "okay";

  tx-pin = <14>;

  rx-pin = <16>;

};

All of the standard baud rates work fine in the 'current-speed' field, but all other values fail if they are not defined in:

serial/uart_nrfx_uarte.c

What is the proper (Zephyr) way to manually set the baud to other values?

[_r_y_a_n]

I have found a working solution by setting the BAUDRATE register directly, following the solution described on this page:

https://community.particle.io/t/solved-non-standard-baud-rate/48064

I calculated the register value using previous posts on this forum such as:

https://devzone.nordicsemi.com/f/nordic-q-a/391/uart-baudrate-register-values

For future reference: It is probably important to note, in the specific case of Zephyr setup the .overlay file still needs a standard baud rate when the device starts up, otherwise it will crash when that UART tries to initialise because it will find no value in the lookup table of uart_nrfx_uarte.c. Then anytime after this it is possible to reset to BAUDRATE register to the desired value.