diff --git a/config/telink/chip-module/CMakeLists.txt b/config/telink/chip-module/CMakeLists.txt
index 86e629d4d54c68..91d108153bc68f 100644
--- a/config/telink/chip-module/CMakeLists.txt
+++ b/config/telink/chip-module/CMakeLists.txt
@@ -299,10 +299,17 @@ add_dependencies(chip chip-gn)
 # Define 'chip-ota-image' target for building CHIP OTA image
 # ==============================================================================
 
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+    set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+    unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
 if (CONFIG_CHIP_OTA_IMAGE_BUILD)
     add_custom_target(build_mcuboot ALL
         COMMAND
-        west build -b tlsr9518adk80d -d build_mcuboot ${ZEPHYR_BASE}/../bootloader/mcuboot/boot/zephyr -- -DCONFIG_BOOT_SWAP_USING_MOVE=y
+        west build -b ${BOARD} -d build_mcuboot ${ZEPHYR_BASE}/../bootloader/mcuboot/boot/zephyr
+            -- -DCONFIG_BOOT_SWAP_USING_MOVE=y -DDTC_OVERLAY_FILE=${GLOBAL_DTC_OVERLAY_FILE}
     )
 
     add_custom_target(merge_mcuboot ALL
diff --git a/examples/all-clusters-app/telink/CMakeLists.txt b/examples/all-clusters-app/telink/CMakeLists.txt
index afe18d1cb7c95d..86eee4dbb2373f 100644
--- a/examples/all-clusters-app/telink/CMakeLists.txt
+++ b/examples/all-clusters-app/telink/CMakeLists.txt
@@ -22,6 +22,27 @@ get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALP
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 get_filename_component(ALL_CLUSTERS_COMMON_DIR ${CHIP_ROOT}/examples/all-clusters-app/all-clusters-common REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/all-clusters-minimal-app/telink/CMakeLists.txt b/examples/all-clusters-minimal-app/telink/CMakeLists.txt
index 0661e4038e31cd..f5a0eeb9ede2e6 100644
--- a/examples/all-clusters-minimal-app/telink/CMakeLists.txt
+++ b/examples/all-clusters-minimal-app/telink/CMakeLists.txt
@@ -22,6 +22,27 @@ get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALP
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 get_filename_component(ALL_CLUSTERS_COMMON_DIR ${CHIP_ROOT}/examples/all-clusters-app/all-clusters-common REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/contact-sensor-app/telink/CMakeLists.txt b/examples/contact-sensor-app/telink/CMakeLists.txt
index 144d1eaab34f88..8ac2147a9d058b 100755
--- a/examples/contact-sensor-app/telink/CMakeLists.txt
+++ b/examples/contact-sensor-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/light-switch-app/telink/CMakeLists.txt b/examples/light-switch-app/telink/CMakeLists.txt
index af48b2eb688c3e..4b3ea23b7c9d39 100755
--- a/examples/light-switch-app/telink/CMakeLists.txt
+++ b/examples/light-switch-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/lighting-app/telink/CMakeLists.txt b/examples/lighting-app/telink/CMakeLists.txt
index d1d4df8ed4307c..e56b1f4515b7cf 100644
--- a/examples/lighting-app/telink/CMakeLists.txt
+++ b/examples/lighting-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/lock-app/telink/CMakeLists.txt b/examples/lock-app/telink/CMakeLists.txt
index 434903038ed3b7..d424f24bcd19f0 100755
--- a/examples/lock-app/telink/CMakeLists.txt
+++ b/examples/lock-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/ota-requestor-app/telink/CMakeLists.txt b/examples/ota-requestor-app/telink/CMakeLists.txt
index 2590a109de43d3..9b66cd662f85f2 100644
--- a/examples/ota-requestor-app/telink/CMakeLists.txt
+++ b/examples/ota-requestor-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/pump-app/telink/CMakeLists.txt b/examples/pump-app/telink/CMakeLists.txt
index b1b9bac240e127..c5478b64704930 100755
--- a/examples/pump-app/telink/CMakeLists.txt
+++ b/examples/pump-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/pump-controller-app/telink/CMakeLists.txt b/examples/pump-controller-app/telink/CMakeLists.txt
index 55e6adedf49a87..56721841de599f 100755
--- a/examples/pump-controller-app/telink/CMakeLists.txt
+++ b/examples/pump-controller-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/temperature-measurement-app/telink/CMakeLists.txt b/examples/temperature-measurement-app/telink/CMakeLists.txt
index 04b3803882cc95..04233bf515e522 100644
--- a/examples/temperature-measurement-app/telink/CMakeLists.txt
+++ b/examples/temperature-measurement-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/thermostat/telink/CMakeLists.txt b/examples/thermostat/telink/CMakeLists.txt
index 375952e2959c53..e42891919e8b59 100755
--- a/examples/thermostat/telink/CMakeLists.txt
+++ b/examples/thermostat/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/examples/window-app/telink/CMakeLists.txt b/examples/window-app/telink/CMakeLists.txt
index c7323fe9aa79fe..73d2a710037b54 100644
--- a/examples/window-app/telink/CMakeLists.txt
+++ b/examples/window-app/telink/CMakeLists.txt
@@ -21,6 +21,27 @@ get_filename_component(CHIP_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/third_party/connect
 get_filename_component(TELINK_COMMON ${CHIP_ROOT}/examples/platform/telink REALPATH)
 get_filename_component(GEN_DIR ${CHIP_ROOT}/zzz_generated/ REALPATH)
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+  set(LOCAL_DTC_OVERLAY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/boards/${BOARD}.overlay")
+else()
+  unset(LOCAL_DTC_OVERLAY_FILE)
+endif()
+
+if(EXISTS "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+  set(GLOBAL_DTC_OVERLAY_FILE "${CHIP_ROOT}/src/platform/telink/${BOARD}.overlay")
+else()
+  unset(GLOBAL_DTC_OVERLAY_FILE)
+endif()
+
+if(DTC_OVERLAY_FILE)
+  set(DTC_OVERLAY_FILE
+    "${DTC_OVERLAY_FILE} ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE}"
+    CACHE STRING "" FORCE
+  )
+else()
+  set(DTC_OVERLAY_FILE ${GLOBAL_DTC_OVERLAY_FILE} ${LOCAL_DTC_OVERLAY_FILE})
+endif()
+
 set(CONF_FILE ${CHIP_ROOT}/config/telink/app/zephyr.conf prj.conf)
 
 # Load NCS/Zephyr build system
diff --git a/src/platform/telink/tlsr9518adk80d.overlay b/src/platform/telink/tlsr9518adk80d.overlay
new file mode 100644
index 00000000000000..6a9d70c32fb32c
--- /dev/null
+++ b/src/platform/telink/tlsr9518adk80d.overlay
@@ -0,0 +1,80 @@
+/ {
+	aliases {
+		pwm-led0 = &pwm_led0;
+		pwm-led1 = &pwm_led1;
+		pwm-led2 = &pwm_led2;
+		pwm-led3 = &pwm_led3;
+	};
+
+	pwm_leds {
+		/delete-node/ pwm_led_0;
+		pwm_led0: pwm_led_0 {
+			pwms = <&pwm0 0 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+			label = "PWM LED Blue";
+		};
+		pwm_led1: pwm_led_1 {
+			pwms = <&pwm0 3 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+			label = "PWM LED Green";
+		};
+		pwm_led2: pwm_led_2 {
+			pwms = <&pwm0 2 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+			label = "PWM LED Red";
+		};
+		pwm_led3: pwm_led_3 {
+			pwms = <&pwm0 1 PWM_MSEC(20) PWM_POLARITY_NORMAL>;
+			label = "PWM IDENTIFY LED Green";
+	    };
+    };
+};
+
+&pinctrl {
+	pwm_ch0_pb4_default: pwm_ch0_pb4_default {
+		pinmux = <B91_PINMUX_SET(B91_PORT_B, B91_PIN_4, B91_FUNC_B)>;
+	};
+	pwm_ch1_pb5_default: pwm_ch1_pb5_default {
+		pinmux = <B91_PINMUX_SET(B91_PORT_B, B91_PIN_5, B91_FUNC_C)>;
+	};
+	pwm_ch2_pe2_default: pwm_ch2_pe2_default {
+		pinmux = <B91_PINMUX_SET(B91_PORT_E, B91_PIN_2, B91_FUNC_C)>;
+	};
+	pwm_ch3_pe0_default: pwm_ch3_pe0_default {
+		pinmux = <B91_PINMUX_SET(B91_PORT_E, B91_PIN_0, B91_FUNC_C)>;
+	};
+};
+
+&pwm0 {
+	pinctrl-0 = <&pwm_ch0_pb4_default &pwm_ch1_pb5_default &pwm_ch2_pe2_default &pwm_ch3_pe0_default>;
+};
+
+&flash {
+	reg = <0x20000000 0x200000>;
+
+	partitions {
+		/delete-node/ partition@0;
+		/delete-node/ partition@18000;
+		/delete-node/ partition@84000;
+		/delete-node/ partition@f0000;
+		/delete-node/ partition@f4000;
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 0x13000>;
+		};
+		slot0_partition: partition@13000 {
+			label = "image-0";
+			reg = <0x13000 0xf1000>;
+		};
+		factory_partition: partition@104000 {
+			label = "factory-data";
+			reg = <0x104000 0x1000>;
+		};
+		storage_partition: partition@105000 {
+			label = "storage";
+			reg = <0x105000 0x8000>;
+		};
+		slot1_partition: partition@10d000 {
+			label = "image-1";
+			reg = <0x10d000 0xf1000>;
+		};
+		/* region <0x1fe000 0x2000> is reserved for Telink B91 SDK's data */
+	};
+};