diff --git a/litex_boards/platforms/camlink_4k.py b/litex_boards/platforms/camlink_4k.py
index 39ba68537e5e70eda70560dd91c9e230951e9fc3..7e4edbd684a67cfdcc9d13207b1f011d8060fcf5 100644
--- a/litex_boards/platforms/camlink_4k.py
+++ b/litex_boards/platforms/camlink_4k.py
@@ -65,8 +65,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk27"
     default_clk_period = 1e9/27e6
 
-    def __init__(self, **kwargs):
-        LatticePlatform.__init__(self, "LFE5U-25F-8BG381C", _io, **kwargs)
+    def __init__(self, toolchain="trellis", **kwargs):
+        LatticePlatform.__init__(self, "LFE5U-25F-8BG381C", _io, toolchain=toolchain, **kwargs)
 
     def do_finalize(self, fragment):
         LatticePlatform.do_finalize(self, fragment)
diff --git a/litex_boards/platforms/colorlight_5a_75b.py b/litex_boards/platforms/colorlight_5a_75b.py
index 13f23536a762adb507d50634f455d3df09c263f3..c5da55951ab4438e7c42cb3c7b580d72703daf55 100644
--- a/litex_boards/platforms/colorlight_5a_75b.py
+++ b/litex_boards/platforms/colorlight_5a_75b.py
@@ -215,13 +215,13 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk25"
     default_clk_period = 1e9/25e6
 
-    def __init__(self, revision="7.0"):
+    def __init__(self, revision="7.0", toolchain="trellis"):
         assert revision in ["6.1", "7.0"]
         self.revision = revision
         device     = {"6.1": "LFE5U-25F-6BG381C", "7.0": "LFE5U-25F-6BG256C"}[revision]
         io         = {"6.1": _io_v6_1,            "7.0": _io_v7_0}[revision]
         connectors = {"6.1": _connectors_v6_1,            "7.0": _connectors_v7_0}[revision]
-        LatticePlatform.__init__(self, device, io, connectors=connectors, toolchain="trellis")
+        LatticePlatform.__init__(self, device, io, connectors=connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return OpenOCDJTAGProgrammer("openocd_colorlight_5a_75b.cfg")
diff --git a/litex_boards/platforms/colorlight_5a_75e.py b/litex_boards/platforms/colorlight_5a_75e.py
index 0e2b88ce170bd307dc9a760c75b428c5b5f65b20..e352c0a0125ec86db0ce6ddb35d51ba201b4722e 100644
--- a/litex_boards/platforms/colorlight_5a_75e.py
+++ b/litex_boards/platforms/colorlight_5a_75e.py
@@ -222,13 +222,13 @@ class Platform(LatticePlatform):
     default_clk_name = "clk25"
     default_clk_period = 1e9/25e6
 
-    def __init__(self, revision="7.1"):
+    def __init__(self, revision="7.1", toolchain="trellis"):
         assert revision in ["6.0", "7.1"]
         self.revision = revision
         device = {"6.0": "LFE5U-25F-6BG256C", "7.1": "LFE5U-25F-6BG256C"}[revision]
         io = {"6.0": _io_v6_0, "7.1": _io_v7_1}[revision]
         connectors = {"6.0": _connectors_v6_0, "7.1": _connectors_v7_1}[revision]
-        LatticePlatform.__init__(self, device, io, connectors=connectors, toolchain="trellis")
+        LatticePlatform.__init__(self, device, io, connectors=connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return OpenOCDJTAGProgrammer("openocd_colorlight_5a_75b.cfg")
diff --git a/litex_boards/platforms/ecp5_evn.py b/litex_boards/platforms/ecp5_evn.py
index 8e424e35b99e5dde405f26aee41648777875d90f..1a968624bf2b7ed92dbbd5f2f9ad5a8567b0cd6b 100644
--- a/litex_boards/platforms/ecp5_evn.py
+++ b/litex_boards/platforms/ecp5_evn.py
@@ -136,8 +136,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk12"
     default_clk_period = 1e9/12e6
 
-    def __init__(self, **kwargs):
-        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG381", _io, _connectors, **kwargs)
+    def __init__(self, toolchain="trellis", **kwargs):
+        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG381", _io, _connectors, toolchain=toolchain, **kwargs)
 
     def request(self, *args, **kwargs):
         import time
diff --git a/litex_boards/platforms/ecpix5.py b/litex_boards/platforms/ecpix5.py
index c1fd699c8f0d905074445121dd6ecbd474daf99d..56fd5197399bce70d7a24b4e87a54af36a9f568b 100644
--- a/litex_boards/platforms/ecpix5.py
+++ b/litex_boards/platforms/ecpix5.py
@@ -111,8 +111,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk100"
     default_clk_period = 1e9/100e6
 
-    def __init__(self, **kwargs):
-        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG554I", _io, _connectors, **kwargs)
+    def __init__(self, toolchain="trellis", **kwargs):
+        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG554I", _io, _connectors, toolchain=toolchain, **kwargs)
 
     def create_programmer(self):
         return OpenOCDJTAGProgrammer("openocd_ecpix5.cfg")
diff --git a/litex_boards/platforms/fomu_evt.py b/litex_boards/platforms/fomu_evt.py
index 7c4be02ff6b2f9ab7832fccda6b57103d3a8a61d..41a8fe9260e78628d972b384f3dad6178bf2aa85 100644
--- a/litex_boards/platforms/fomu_evt.py
+++ b/litex_boards/platforms/fomu_evt.py
@@ -86,8 +86,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk48"
     default_clk_period = 1e9/48e6
 
-    def __init__(self):
-        LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain="icestorm")
+    def __init__(self, toolchain="icestorm"):
+        LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return IceStormProgrammer()
diff --git a/litex_boards/platforms/fomu_hacker.py b/litex_boards/platforms/fomu_hacker.py
index 37ae8a618965a948d745818936045b26779b8cb9..b29e0a2b5393cf2fe8e7aadcf825a0845f6e5cba 100644
--- a/litex_boards/platforms/fomu_hacker.py
+++ b/litex_boards/platforms/fomu_hacker.py
@@ -66,8 +66,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk48"
     default_clk_period = 1e9/48e6
 
-    def __init__(self):
-        LatticePlatform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain="icestorm")
+    def __init__(self, toolchain="icestorm"):
+        LatticePlatform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return IceStormProgrammer()
diff --git a/litex_boards/platforms/fomu_pvt.py b/litex_boards/platforms/fomu_pvt.py
index 4ccc8dc44010e55623c5e6e779f079a8eadf92ae..39d060e6ded21672c6e818f5081494d9bb523cbd 100644
--- a/litex_boards/platforms/fomu_pvt.py
+++ b/litex_boards/platforms/fomu_pvt.py
@@ -69,8 +69,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk48"
     default_clk_period = 1e9/48e6
 
-    def __init__(self):
-        LatticePlatform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain="icestorm")
+    def __init__(self, toolchain="icestorm"):
+        LatticePlatform.__init__(self, "ice40-up5k-uwg30", _io, _connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return IceStormProgrammer()
diff --git a/litex_boards/platforms/icebreaker.py b/litex_boards/platforms/icebreaker.py
index a998c13bb5d919a74e6412d0daacd4b2e3ad45b4..94d36e90683bc5ee6c68706830d455070e78bade 100644
--- a/litex_boards/platforms/icebreaker.py
+++ b/litex_boards/platforms/icebreaker.py
@@ -89,8 +89,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk12"
     default_clk_period = 1e9/12e6
 
-    def __init__(self):
-        LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain="icestorm")
+    def __init__(self, toolchain="icestorm"):
+        LatticePlatform.__init__(self, "ice40-up5k-sg48", _io, _connectors, toolchain=toolchain)
 
     def create_programmer(self):
         return IceStormProgrammer()
diff --git a/litex_boards/platforms/logicbone.py b/litex_boards/platforms/logicbone.py
index 4cd0470dc6d76bb2710662d6380dc67d17686513..57844291562beca1f25e5942114c8c89d3366ca0 100644
--- a/litex_boards/platforms/logicbone.py
+++ b/litex_boards/platforms/logicbone.py
@@ -192,12 +192,12 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk25"
     default_clk_period = 1e9/25e6
 
-    def __init__(self, revision="rev0", device="45F", **kwargs):
+    def __init__(self, revision="rev0", device="45F", toolchain="trellis", **kwargs):
         assert revision in ["rev0"]
         self.revision = revision
         io         = {"rev0": _io_rev0          }[revision]
         connectors = {"rev0": _connectors_rev0  }[revision]
-        LatticePlatform.__init__(self, f"LFE5UM5G-{device}-8BG381C", io, connectors, **kwargs)
+        LatticePlatform.__init__(self, f"LFE5UM5G-{device}-8BG381C", io, connectors, toolchain="trellis", **kwargs)
 
     def create_programmer(self):
         return DFUProg(vid="1d50", pid="6130")
diff --git a/litex_boards/platforms/orangecrab.py b/litex_boards/platforms/orangecrab.py
index 03a4a46584e6fd286c941c569d97414a3d9e233c..9d4cab294203e759b6431d4b1018b7690f1f1cdb 100644
--- a/litex_boards/platforms/orangecrab.py
+++ b/litex_boards/platforms/orangecrab.py
@@ -220,12 +220,12 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk48"
     default_clk_period = 1e9/48e6
 
-    def __init__(self, revision="0.2", device="25F", **kwargs):
+    def __init__(self, revision="0.2", device="25F", toolchain="trellis", **kwargs):
         assert revision in ["0.1", "0.2"]
         self.revision = revision
         io         = {"0.1": _io_r0_1,            "0.2": _io_r0_2        }[revision]
         connectors = {"0.1": _connectors_r0_1,    "0.2": _connectors_r0_2}[revision]
-        LatticePlatform.__init__(self, f"LFE5U-{device}-8MG285C", io, connectors, **kwargs)
+        LatticePlatform.__init__(self, f"LFE5U-{device}-8MG285C", io, connectors, toolchain=toolchain, **kwargs)
 
     def create_programmer(self):
         return DFUProg(vid="1209", pid="5af0")
diff --git a/litex_boards/platforms/tinyfpga_bx.py b/litex_boards/platforms/tinyfpga_bx.py
index 347cd863dc9ca0c4ef5746f444b5978074da087b..da0aaf12eea26eb10daad1dd881e9fed07dfd46f 100644
--- a/litex_boards/platforms/tinyfpga_bx.py
+++ b/litex_boards/platforms/tinyfpga_bx.py
@@ -67,8 +67,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk16"
     default_clk_period = 1e9/16e6
 
-    def __init__(self):
-        LatticePlatform.__init__(self, "ice40-lp8k-cm81", _io, _connectors, toolchain="icestorm")
+    def __init__(self, toolchain="icestorm"):
+        LatticePlatform.__init__(self, "ice40-lp8k-cm81", _io, _connectors, toolchain=toolchain)
         self.add_extension(serial)
 
     def create_programmer(self):
diff --git a/litex_boards/platforms/trellisboard.py b/litex_boards/platforms/trellisboard.py
index fd3551165304a18b98fba1c2827cc434fc816b3a..3021b54f9aece04303629e3addfc6f512819737e 100644
--- a/litex_boards/platforms/trellisboard.py
+++ b/litex_boards/platforms/trellisboard.py
@@ -259,8 +259,8 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk12"
     default_clk_period = 1e9/12e6
 
-    def __init__(self, **kwargs):
-        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG756C", _io, _connectors, **kwargs)
+    def __init__(self, toolchain="trellis", **kwargs):
+        LatticePlatform.__init__(self, "LFE5UM5G-85F-8BG756C", _io, _connectors, toolchain=toolchain, **kwargs)
 
     def create_programmer(self):
         return OpenOCDJTAGProgrammer("openocd_trellisboard.cfg")
diff --git a/litex_boards/platforms/ulx3s.py b/litex_boards/platforms/ulx3s.py
index f3602590076b94bbb06a1819165219883240cada..fc455b770b55a3e8fbaf62873998b6b21026db3a 100644
--- a/litex_boards/platforms/ulx3s.py
+++ b/litex_boards/platforms/ulx3s.py
@@ -146,11 +146,11 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk25"
     default_clk_period = 1e9/25e6
 
-    def __init__(self, device="LFE5U-45F", revision="2.0", **kwargs):
+    def __init__(self, device="LFE5U-45F", revision="2.0", toolchain="trellis", **kwargs):
         assert device in ["LFE5U-12F", "LFE5U-25F", "LFE5U-45F", "LFE5U-85F"]
         assert revision in ["1.7", "2.0"]
         _io = _io_common + {"1.7": _io_1_7, "2.0": _io_2_0}[revision]
-        LatticePlatform.__init__(self, device + "-6BG381C", _io, **kwargs)
+        LatticePlatform.__init__(self, device + "-6BG381C", _io, toolchain=toolchain, **kwargs)
 
     def create_programmer(self):
         return UJProg()
diff --git a/litex_boards/platforms/versa_ecp5.py b/litex_boards/platforms/versa_ecp5.py
index 41021e09303c57f28b17fe780e951240fdfbcf25..f8dd49a2f87be5d895c94f31d86ae5711117ccc3 100644
--- a/litex_boards/platforms/versa_ecp5.py
+++ b/litex_boards/platforms/versa_ecp5.py
@@ -235,9 +235,9 @@ class Platform(LatticePlatform):
     default_clk_name   = "clk100"
     default_clk_period = 1e9/100e6
 
-    def __init__(self, device="LFE5UM5G", **kwargs):
+    def __init__(self, device="LFE5UM5G", toolchain="trellis", **kwargs):
         assert device in ["LFE5UM5G", "LFE5UM"]
-        LatticePlatform.__init__(self, device + "-45F-8BG381C", _io, _connectors, **kwargs)
+        LatticePlatform.__init__(self, device + "-45F-8BG381C", _io, _connectors, toolchain=toolchain, **kwargs)
 
     def create_programmer(self):
         return OpenOCDJTAGProgrammer("openocd_versa_ecp5.cfg")