add dummy attr_translate

litex/build/gowin/gowin.py

@@ -59,6 +59,19 @@ def _build_script(name, partnumber, files, options):
         f.write(tcl)
 
 class GowinToolchain():
+
+    attr_translate = {
+        "keep":             None,
+        "no_retiming":      None,
+        "async_reg":        None,
+        "mr_ff":            None,
+        "mr_false_path":    None,
+        "ars_ff1":          None,
+        "ars_ff2":          None,
+        "ars_false_path":   None,
+        "no_shreg_extract": None
+    }
+
     def __init__(self):
         self.options = {}
 

litex/build/gowin/platform.py

@@ -32,7 +32,9 @@ class GowinPlatform(GenericPlatform):
     def get_verilog(self, *args, special_overrides=dict(), **kwargs):
         so = dict(common.gowin_special_overrides)
         so.update(special_overrides)
-        return GenericPlatform.get_verilog(self, *args, special_overrides=so, **kwargs)
+        return GenericPlatform.get_verilog(self, *args, special_overrides=so,
+                                           attr_translate=self.toolchain.attr_translate,
+                                           **kwargs)
 
     def build(self, *args, **kwargs):
         return self.toolchain.build(self, *args, **kwargs)