The Pi5 firmware now has the facility to enable the RP1 UART immediately prior to launching the ARMs so you can get UART debug on the 40-pin header from Linux earlycon / bare metal e.g. if you are using the BOOT_UART header for ARM JTAG.
https://github.com/raspberrypi/rpi-eepr ... 9c43a44062
Update the bootloader usingconfig.txtAdd this to cmdline.txt / use this as the UART_DR address
https://github.com/raspberrypi/rpi-eepr ... 9c43a44062
Update the bootloader using
Code:
sudo rpi-updateCode:
enable_rp1_uart=1pciex4_reset=0Code:
earlycon=pl011,0x1f00030000,115200n8Statistics: Posted by timg236 — Tue Jul 30, 2024 4:43 pm