diff --git a/litex/build/efinix/ifacewriter.py b/litex/build/efinix/ifacewriter.py
index 95cd66c8a..b2ca619fd 100644
--- a/litex/build/efinix/ifacewriter.py
+++ b/litex/build/efinix/ifacewriter.py
@@ -295,6 +295,8 @@ design.create("{2}", "{3}", "./../gateware", overwrite=True)
             else:
                 cmd += 'design.gen_pll_ref_clock("{}", pll_res="{}", refclk_src="{}", refclk_name="{}", ext_refclk_no="{}")\n\n' \
                     .format(name, block["resource"], block["input_clock"], block["input_clock_name"], block["clock_no"])
+            for p, val in block["input_properties"]:
+                cmd += 'design.set_property("{}","{}","{}")\n'.format(block["input_clock_name"], p, val)
         else:
             cmd += 'design.gen_pll_ref_clock("{}", pll_res="{}", refclk_name="{}", refclk_src="CORE")\n'.format(name, block["resource"], block["input_signal"])
             cmd += 'design.set_property("{}", "CORE_CLK_PIN", "{}", block_type="PLL")\n\n'.format(name, block["input_signal"])
diff --git a/litex/soc/cores/clock/efinix.py b/litex/soc/cores/clock/efinix.py
index ba2a9e70d..0ca5ebf6e 100644
--- a/litex/soc/cores/clock/efinix.py
+++ b/litex/soc/cores/clock/efinix.py
@@ -85,6 +85,7 @@ class EFINIXPLL(LiteXModule):
             block["input_refclk_name"] = refclk_name
             block["resource"]        = pll_res
             block["clock_no"]        = clock_no
+            block["input_properties"] = self.platform.get_pin_properties(clkin)
             self.logger.info("Clock source: {}, using EXT_CLK{}".format(block["input_clock"], clock_no))
             self.platform.get_pll_resource(pll_res)
         else: