Actual UART support and performance on Banana Pi BPI-R4

[Sergetsp]

Hello, all,

 

I am trying to confirm the actual status of UART support on the Banana Pi BPI-R4.

Does the hardware UART work reliably and appear as a character device (e.g., /dev/uart*) under Armbian Linux?

Also, what is the maximum baud rate supported by this port?

 

And one more question:

Does Armbian support the Quectel EP06 modem (LTE, mini PCIe)?

 

Thank you in advance,

SY, Serge

[Werner]

According to the datasheet (https://de.scribd.com/document/948890791/MT7988A-Datasheet) the supported baudrate seems to be between 300baud and 3Mbaud. However cannot tell anything about support status. Neither do I have this hw, nor did I ever dig into this soc.

Starting with device tree overlays might be a good start or check the whole device tree in general for the uart nodes if present.