@oe1cxw have you looked at supporting any of the Lattice ECP5 chips in Yosys/arachne?
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Like You, I myself do not have enough time or necessarily the right aptitude for it, I am however looking at the bigger picture and wondering about sponsoring the right person to do so. Have you looked at the ECP5 architecture would it make sense with Arachne-pnr or a new pnr?
I have not looked at the ECP5, but I think a new pnr will be the right choice: (1) ECP5 is much larger -> so simulated annealing wont work
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as well and (2) there is no reason to assume that there are any architectural similarities between iCE40 and ECP5. After all they have
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been developed independently of each other by different companies.
End of conversation
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