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Set baud rate 115200 and set default serial interface to UART1

Oleksii Kutuzov requested to merge uart-output into kirkstone

Modular Vision carrier board supports only up to 115200 baud rate, can only be accessed via interface SER0 which is UART1 of the SOM-SMARC-Genio700 module.

Added and enabled patches to set 115200 baud rate for:

  • lk
  • BL2
  • BL31
  • BL33 (U-Boot)
  • Linux kernel and system

Only added patches to disable serial output (to be enabled as needed):

  • lk
  • BL2
  • BL31

Summary:

  • BootROM output can not be switched to UART1 and needs extra research to disable. Currently is always present on UART0 115200.
  • BL2, BL31 need extra research to switch to UART1 (should be possible according to MTK recommendations, but does not seem to work). Without disable patches are always present on UART0 115200. Also questionable, whether we need this output in general as it does not get modified by us.
  • BL33 (U-Boot) switched to 115200 baud rate on UART1 in seco-ne/3rd-party/u-boot/u-boot-mtk!11 (merged)
  • Linux kernel switched to baud rate 115200 and UART1 in seco-ne/kernel/linux-mtk!24 (merged)
Edited by Oleksii Kutuzov

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