Help with configuration to enable UART with GPIO 14, 15 on Raspberry Pi 5

[hnamtran]

Hello everyone,

I would like to ask a question about how to modify Zephyr configuration so that the GPIO 14, 15 (TX and RX pins as indicated in [1]) on the Raspberry Pi 5 can be used as the primary UART. In other words, when running a program, I would like to have the same setup in this image [2] and use a serial terminal (minicom, gtkterm,...) for UART and display printf messages)

The example provided in the documentation [3] uses Raspberry Pi 5's primary UART, which is the debug headers, instead of the GPIO pins. I followed the example and the serial communication worked perfectly; however, I need to use the debug headers for SWD debugging with the Raspberry Debug Probe as instructed in [4].

Can anyone give me some suggestions about where to look for a potential solution ? I tried to look at the device tree at [5]; however, it seems to me that there is only one configuration for the primary UART without further information.

[1] : https://vilros.com/pages/raspberry-pi-5-pinout
[2] : https://www.raspberrypi.com/documentation/microcontrollers/images/labelled-wiring.jpg
[3] : https://docs.zephyrproject.org/latest/boards/raspberrypi/rpi_5/doc/index.html#serial-communication
[4] : https://macoy.me/blog/programming/RaspberryPi5Debugging
[5] : https://github.com/zephyrproject-rtos/zephyr/blob/main/dts/arm64/broadcom/bcm2712.dtsi?plain=1

Thanks in advance