On 04/02/2025 17:57, matthew.gerlach@linux.intel.com wrote:

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+#include "socfpga_agilex_pcie_root_port.dtsi"
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Missing board compatible, missing bindings.

The model and compatible bindings are inherited from socfpga_agilex_socdk.dts.

Then this is the same board, so entire DTS should be removed and instead
merged into parent DTS. There is no such thing as "inherit" of an
compatible.

It is the same physical board, but the image programmed into the FPGA is 
different in so far as the PCIe IP is connected and enabled. This 
different FPGA image allows for a PCIe End Point to be plugged in. Is this 
difference enough for it be considered and different board?

Yes, it can be different board DTS. Look at other vendors how shared
designs are being actually shared between DTS - DTSI.

Best regards,
Krzysztof