build/efinix/ifacewriter: bypass clks out frequency check for Trion w…

…hen a feedback clock is used

litex/build/efinix/ifacewriter.py

@@ -370,11 +370,13 @@ def generate_pll(self, block, partnumber, verbose=True):
             cmd += 'prop_map = design.get_property("{}", clock_source_prop, block_type="PLL")\n'.format(name)
             cmd += 'pprint.pprint(prop_map)\n'
 
-            for i, clock in enumerate(block["clk_out"]):
-                cmd += '\nfreq = float(prop_map["CLKOUT{}_FREQ"])\n'.format(i)
-                cmd += 'if freq != {}:\n'.format(clock[1]/1e6)
-                cmd += '    print("ERROR: CLKOUT{} configured for {}MHz is {{}}MHz".format(freq))\n'.format(i, clock[1]/1e6)
-                cmd += '    exit("PLL ERROR")\n'
+            # Efinix python API is buggy for Trion devices when a feedback is defined...
+            if block["version"] == "V3" or (block["version"] == "V1_V2" and block["feedback"] == -1):
+                for i, clock in enumerate(block["clk_out"]):
+                    cmd += '\nfreq = float(prop_map["CLKOUT{}_FREQ"])\n'.format(i)
+                    cmd += 'if freq != {}:\n'.format(clock[1]/1e6)
+                    cmd += '    print("ERROR: CLKOUT{} configured for {}MHz is {{}}MHz".format(freq))\n'.format(i, clock[1]/1e6)
+                    cmd += '    exit("PLL ERROR")\n'
 
         cmd += "\n#---------- END PLL {} ---------\n\n".format(name)
         return cmd