RK3588 - How to enable another serial port for mcu

[soonsolidchentuo]

Problem Overview

Hello, I'd like to use UART5 to communicate with the peripheral MCU on RK3588.

Step description

1. The default 3588 U-Boot device tree uses the "snps, dw app start" driver, corresponding to driver/serial/ns16550. c
2. When I enabled the device tree node and entered U-Boot, I used the command dm tree, but the match was unsuccessful.
   ebd3dff0 serial [ ] ns16550_serial |-- serial@feb50000 *

Question:

1. I found that the register data structure of ns16550. h is inconsistent with the register of RK3588. Can this driver be used?
2. How can I use UART5, and can I only write it myself? May I ask if there are any relevant reference documents?
   I don't need complex functions such as FIFO, DMA, virtual memory, etc., I only need simple protocol communication.

Thank you

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问题概述

你好，我需要在RK3588上，使用Uart5来和外设MCU通信。

步骤描述

1. 我发现默认的3588的uboot设备树上，是使用"snps,dw-apb-uart"的驱动，对应的驱动是driver/serial/ns16550.c
2. 当我使能了设备树节点，进入uboot后使用命令dm tree，匹配不成功。
   ebd3dff0 serial [ ] ns16550_serial |-- serial@feb50000 *

问题

1. 我发现ns16550.h的寄存器数据结构和RK3588的寄存器不一致，是否无法使用这个驱动？
2. 我该如何使用Uart5，是否只能自己写？请问有没有相关的参考文档，我不需要fifo、dma、虚拟内存等复杂功能，只需要简单的协议通信。
   谢谢

[NehalAR]

@soonsolidchentuo can you tell me where you are accessing your console/shell at?

[soonsolidchentuo]

@NehalAR My board has a serial debug port

[NehalAR]

can you look at this #94, also share if you are following any specific sdk like firefly, luckfox etc for dev env?