Linux/AM6528: WKUP-uart access from A53

Mohsen Khayami

Part Number: AM6528

Tool/software: Linux

Can the WKUP_UART be used by linux running on the A53? Do we have any linux examples for this?

Also can the MCU-UART (this is part of the MCU block) be used by the A53 running linux? If yes i assume it is already part of the linux release?

Any example or how to setup the dts for these 2 uarts would be great.

We need to have 4 UARTS that can be controlled by the A53 running linux. There are 3 as part of the A53 so need one more.

Thanks

over 5 years ago

0 Bin Liu over 5 years ago

TI__Guru*** 125756 points

Hi,

Yes, both WKUP-UART and MCU-UART are already used in Linux. Please check the devicetree file k3-am6.dtsi in the PLSDK v5.2 kernel:

  22         aliases {
  23                 serial0 = &wkup_uart0;
  24                 serial1 = &mcu_uart0;
  25                 serial2 = &main_uart0;
  26                 serial3 = &main_uart1;
  27                 serial4 = &main_uart2;
...

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Linux/AM6528: WKUP-uart access from A53