Comment 35 for bug 1805668

I don't see the need for separate images for the Pi 2 and 3. I think that there should only be one image that should work on both the Pi 2 and 3. u-boot works on the Pi 3 if setup with rpi_3_defconfig (for 64-bit) or rpi_3_32b_config (for 32-bit). You can enable BCM2836 support (if setup with rpi_3_32b_config) and then compile. This results in one u-boot binary that works on both the Pi 2 and 3).

raspi3-firmware is a script that gets run on every kernel update. It creates a new config.txt file so that the Pi will boot from the new kernel and initramfs. The problem is that it overwrites the existing config.txt instead of just overwriting the kernel and initramfs settings in config.txt.