diff --git a/litex/build/efinix/efinity.py b/litex/build/efinix/efinity.py
index 1ee4e65b8..f517a9c0e 100644
--- a/litex/build/efinix/efinity.py
+++ b/litex/build/efinix/efinity.py
@@ -160,7 +160,7 @@ def _build_peri(efinity_path, build_name, partnumber, named_sc, named_pc, fragme
 
 # Project configuration ------------------------------------------------------------------------
 
-def _build_xml(partnumber, build_name, sources, additional_xml_commands):
+def _build_xml(partnumber, timing_model, build_name, sources, additional_xml_commands):
 
     root = et.Element('efx:project')
 
@@ -187,7 +187,7 @@ def _build_xml(partnumber, build_name, sources, additional_xml_commands):
     device_info = et.SubElement(root, 'efx:device_info')
     et.SubElement(device_info, 'efx:family', name = 'Trion')
     et.SubElement(device_info, 'efx:device', name = partnumber)
-    et.SubElement(device_info, 'efx:timing_model', name = 'C4')
+    et.SubElement(device_info, 'efx:timing_model', name = timing_model)
 
     design_info = et.SubElement(root, 'efx:design_info')
     et.SubElement(design_info, "efx:top_module", name = build_name)
@@ -292,6 +292,7 @@ class EfinityToolchain():
         # Generate project file (.xml)
         _build_xml(
             partnumber              = platform.device,
+            timing_model            = platform.timing_model,
             build_name              = build_name,
             sources                 = platform.sources,
             additional_xml_commands = self.additional_xml_commands)
diff --git a/litex/build/efinix/platform.py b/litex/build/efinix/platform.py
index ef550e7ed..2f337e881 100644
--- a/litex/build/efinix/platform.py
+++ b/litex/build/efinix/platform.py
@@ -19,6 +19,9 @@ class EfinixPlatform(GenericPlatform):
     def __init__(self, *args, toolchain="efinity", **kwargs):
         GenericPlatform.__init__(self, *args, **kwargs)
 
+        self.timing_model = self.device[-2:]
+        self.device       = self.device[:-2]
+
         self.pll_available = ['PLL_TL0', 'PLL_TR0', 'PLL_TR1', 'PLL_TR2', 'PLL_TR3', 'PLL_BR0', 'PLL_BR1', 'PLL_BR2', 'PLL_BL0']
         self.pll_used = []