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https://github.com/raspberrypi/rpi-eeprom.git
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945d708fd0
* Optimize all-banks/per-bank refresh timings for Pi5 8GB
* Improve compatibility for booting from some USB SD card readers
https://github.com/raspberrypi/rpi-eeprom/issues/527
* Add enable_rp1_uart=1 to config.txt to initialise RP1 UART0 immediately
prior to starting the ARMs get earlycon on 40-pin header (pins 14,15)
Also requires pciex4_reset=0 in config.txt
earlycon=pl011,0x1f00030000,115200n8
rpi-eeprom
This repository contains the scripts and pre-compiled binaries used to create the rpi-eeprom package which is used to update the Raspberry Pi 4 and Raspberry Pi 5 bootloaders EEPROM images.
Support
Please check the Raspberry Pi general discussion forum if you have a support question.
Reset to factory defaults
To reset the bootloader back to factory defaults use Raspberry Pi Imager to write an EEPROM update image to a spare SD card. Select Misc utility images under the Operating System tab.