AM625: Using UART6 as console for tfa, u-boot and linux kernel

Markus Kappeler

Part Number: AM625

We need to use the UART6 as system console due to our HW design.

The Linux console is working properly on UART6.

Unfortunately I soon as we like to use the UART6 as system console in SPL or TF-A then the CPU (Cortex-R5) seams not to start the system.

In the TRM we couldn't find any restrictions.

Is there any restriction regarding on which UART the system console is?

Any hint is highly appreciated.

over 2 years ago

0 Bin Liu over 2 years ago

TI__Guru**** 168211 points

Hi Markus,

I am routing your query to our U-Boot expert for comments.

0 BO over 2 years ago in reply to Bin Liu

TI__Genius 12760 points

Hi Bin,

see offline mail.

Regards

Bernd

0 BO over 2 years ago in reply to BO

TI__Genius 12760 points

Hi Hong,

customer is still waiting.

Regards, Bernd

0 Hong Guan64 over 2 years ago in reply to BO

TI__Guru 68430 points

Hello,
Here're some pointers for your reference.
On TI AM62x-SK board, main_uart0 is used for serial terminal port
1. main_uart0 DT node
- main_uart0... DT nodes for AM62x SoC
git.ti.com/gitweb
- main_uart0 DT node pinmux, enable etc...for AM62x-SK board
git.ti.com/gitweb
git.ti.com/gitweb
- main_uart0 DT node in SPL DM
git.ti.com/gitweb
2. main_uart0 DM init etc... in R5-SPL
git.ti.com/gitweb

You may refer main_uart0 example for AM62x-SK, and apply to main_uart6 for your user case.
Best,
-Hong

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AM625: Using UART6 as console for tfa, u-boot and linux kernel