Linux/AM5728: MLO UART Output

Amir Azadi

Expert 1105 points

Part Number: AM5728

Tool/software: Linux

Hi All

I have the same question regarding UART console in MLO .

How to change MLO UART console number? I have done all the changes and they are OK with uboot but MLO prints nothing.

The following lines are printed by MLO in GPEVM but I can not get them on my custom board:

U-Boot SPL 2018.01-00444-g17164f4a5d-dirty (Feb 26 2019 - 09:12:21)
DRA752-GP ES2.0
Trying to boot from MMC1
no pinctrl state for default mode
no pinctrl state for default mode

The changes on /include/configs/am57xx_evm.h file do nothing about it.

Uboot console is OK.

over 6 years ago

0 Kemal R. Shakir over 6 years ago

TI__Guru 55345 points

Hello Aidin,

You need to change the chosen stdout-path = &uartX; in <Processor SDK>/board-support/u-boot-<version>/arch/arm/dts/am57xx-idk-common.dtsi to reroute the MLO UART Output.

Best regards,
Kemal

0 Kemal R. Shakir over 6 years ago in reply to Kemal R. Shakir

TI__Guru 55345 points

Hello Aidin,

When you change the chosen stdout-path in am57xx-idk-common.dtsi the MLO will start to print messages to UART. I’ve not heard back from you in a month, so that I am assuming that this worked and I’m going to close the thread now and mark the issue resolved. I hope we were able to help. If you have any follow-up questions, please reply to this thread or start a new thread.

Best regards,
Kemal

0 Kemal R. Shakir over 6 years ago

TI__Guru 55345 points

Hello Aidin,

What is the status of this thread? Were you able to resolve this? What was the root cause? What is your final conclusion?

Best regards,
Kemal

0 Amir Azadi over 6 years ago in reply to Kemal R. Shakir

Expert 1105 points

Hi Kemal

Thanks for the follow, I forgot to tell you that your previous post resolved my problem and now I have MLO output message.

Best Regards

Processors

Processors forum

Linux/AM5728: MLO UART Output