diff --git a/app/boards/arm/adv360pro/pre_dt_board.cmake b/app/boards/arm/adv360pro/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/adv360pro/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/bluemicro840/pre_dt_board.cmake b/app/boards/arm/bluemicro840/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/bluemicro840/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/bt60/pre_dt_board.cmake b/app/boards/arm/bt60/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/bt60/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/ckp/pre_dt_board.cmake b/app/boards/arm/ckp/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/ckp/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/corneish_zen/pre_dt_board.cmake b/app/boards/arm/corneish_zen/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/corneish_zen/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/glove80/pre_dt_board.cmake b/app/boards/arm/glove80/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/glove80/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/mikoto/pre_dt_board.cmake b/app/boards/arm/mikoto/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/mikoto/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/nice60/pre_dt_board.cmake b/app/boards/arm/nice60/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/nice60/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/nice_nano/pre_dt_board.cmake b/app/boards/arm/nice_nano/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/nice_nano/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/nrf52840_m2/pre_dt_board.cmake b/app/boards/arm/nrf52840_m2/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/nrf52840_m2/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/nrfmicro/pre_dt_board.cmake b/app/boards/arm/nrfmicro/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/nrfmicro/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/pillbug/pre_dt_board.cmake b/app/boards/arm/pillbug/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/pillbug/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/puchi_ble/pre_dt_board.cmake b/app/boards/arm/puchi_ble/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/puchi_ble/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file
diff --git a/app/boards/arm/s40nc/pre_dt_board.cmake b/app/boards/arm/s40nc/pre_dt_board.cmake
new file mode 100644
index 00000000..05b0efe5
--- /dev/null
+++ b/app/boards/arm/s40nc/pre_dt_board.cmake
@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2024 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+# Suppresses duplicate unit-address warning at build time for power, clock, acl and flash-controller
+# https://docs.zephyrproject.org/latest/build/dts/intro-input-output.html
+
+list(APPEND EXTRA_DTC_FLAGS "-Wno-unique_unit_address_if_enabled")
\ No newline at end of file