diff --git a/litex_boards/platforms/efinix_trion_t20_bga256_dev_kit.py b/litex_boards/platforms/efinix_trion_t20_bga256_dev_kit.py
index a06fe82..512345e 100644
--- a/litex_boards/platforms/efinix_trion_t20_bga256_dev_kit.py
+++ b/litex_boards/platforms/efinix_trion_t20_bga256_dev_kit.py
@@ -2,8 +2,6 @@
 # This file is part of LiteX-Boards.
 #
 # Copyright (c) 2021 Miodrag Milanovic <mmicko@gmail.com>
-# Copyright (c) 2021 Franck Jullien <franck.jullien@collshade.fr>
-# Copyright (c) 2021 Florent Kermarrec <florent@enjoy-digital.fr>
 # SPDX-License-Identifier: BSD-2-Clause
 
 from litex.build.generic_platform import *
@@ -16,6 +14,13 @@ _io = [
     # Clk
     ("clk50", 0, Pins("L13"), IOStandard("3.3_V_LVTTL_/_LVCMOS")),
 
+    # Serial
+    ("serial", 0,
+        Subsignal("tx", Pins("H4:18")), # 27 on H4
+        Subsignal("rx", Pins("H4:19")), # 28 on H4
+        IOStandard("3.3_V_LVTTL_/_LVCMOS") , Misc("WEAK_PULLUP")
+    ),
+
     # Leds
     ("user_led", 0, Pins("D14"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
     ("user_led", 1, Pins("E13"), IOStandard("3.3_V_LVTTL_/_LVCMOS"), Misc("DRIVE_STRENGTH=3")),
diff --git a/litex_boards/targets/efinix_trion_t20_bga256_dev_kit.py b/litex_boards/targets/efinix_trion_t20_bga256_dev_kit.py
index 2a70d94..2ae5ddb 100755
--- a/litex_boards/targets/efinix_trion_t20_bga256_dev_kit.py
+++ b/litex_boards/targets/efinix_trion_t20_bga256_dev_kit.py
@@ -39,21 +39,11 @@ class _CRG(Module):
         pll.register_clkin(clk50, 50e6)
         pll.create_clkout(self.cd_sys, sys_clk_freq, with_reset=True)
 
-# Default peripherals
-serial = [
-    ("serial", 0,
-        Subsignal("tx", Pins("H4:18")), # 27 on H4
-        Subsignal("rx", Pins("H4:19")), # 28 on H4
-        IOStandard("3.3_V_LVTTL_/_LVCMOS") , Misc("WEAK_PULLUP")
-    )
-]
-
 # BaseSoC ------------------------------------------------------------------------------------------
 
 class BaseSoC(SoCCore):
     def __init__(self, sys_clk_freq=int(100e6), with_spi_flash=False, with_led_chaser=True, **kwargs):
         platform = efinix_trion_t20_bga256_dev_kit.Platform()
-        platform.add_extension(serial)
 
         # SoCCore ----------------------------------------------------------------------------------
         SoCCore.__init__(self, platform, sys_clk_freq,