[PATCH v5 00/17] Basic StarFive JH7110 RISC-V SoC support

Heinrich Schuchardt heinrich.schuchardt at canonical.com
Tue May 2 15:24:11 CEST 2023

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 

Best regards


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