Eliminate AXI tdd_core module when not including TDD in AD9361

Question

Greetings, 
 
 I'm customizing the FPGA logic in a Pluto Rev C. I have disabled the TDD in the AD9361 to save FPGA resources; this works. I notice there is an AXI target axi_tdd_0/tdd_core which consumes some logic resources. Can someone recommend how to safely remove this? I considered simply tie-ing off the AXI target interface to always return 0's. However, I suspect there is a more complete solution where I tell the processing system that this device is no longer here? 
 Better yet, I would like to use this target destination as my own AXI interface, but that is beyond the scope of my question and I think has been answered before. For now I would just like my FPGA resources back. 
 Regards, 
 Steve

Stanca · Accepted Answer

Hello, 
 
 You can safely remove the axi_tdd_0 instance entirely and all the corresponding connections from the Pluto block design , then rebuild the project. If you're using Linux, you'll have to remove it from the devicetree , too. 
 
 Kind regards, 
 Stanca)

Stanca · Answer

############# ## WARNING ## ############# 
 If you don't delete it from the Linux devicetree, you will brick the Pluto, resulting in an issue like here .

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Eliminate AXI tdd_core module when not including TDD in AD9361