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cdsteinkuehler / br2rauc

Buildroot + RAUC
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U-boot patch: Copy RPI fw modified fdt settings to u-boot loaded fdt #9

Closed leonardoaraujodf closed 2 years ago

leonardoaraujodf commented 2 years ago

The closed source RPI firmware modifies several entries in the device-tree that are important for proper boot. The complete list of these entries can be found at:

https://forums.raspberrypi.com/viewtopic.php?p=1974233&hilit=firmware+device+tree+dma+ranges#p1974233

The function ft_board_setup() was modified so that if u-boot has loaded a fdt that is different than the rpi fw fdt, then it will copy all those important nodes and properties created and modified by the rpi fw to the u-boot loaded fdt blob.

Signed-off-by: Leonardo Amorim lam@vizrt.com

leonardoaraujodf commented 2 years ago

Hi! Thank you for the notes! I have just submitted a amend for this commit and I changed the comments to correct the English mistakes. In my RPI4 seems to be working fine.