On 5/2/23 15:11, Andreas Schwab wrote:
On Mai 02 2023, Matthias Brugger wrote:
I'm not sure I get your point. The devicetree will be passed to the kernel
via a pointer in a register, the kernel does not need to load the
devicetree into memory, it will use the one passed by U-Boot.
But U-Boot needs to load it, and the kernel is the authority in
providing it.
To make it a bit clearer:
Several U-Boot boot methods use the value of environment variable
$fdtfile to load a device-tree from file. The same holds true for the
boot.scr file created by Debian's flash-kernel package.
A good solution would be to read the EEPROM to determine the exact board
version, to set $fdtfile accordingly and update U-Boots control dtb as
needed.
Best regards
Heinrich
