diff --git a/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.dts b/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.dts
index ef92bda9930..50a03e2d48f 100644
--- a/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.dts
+++ b/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.dts
@@ -20,41 +20,5 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.yaml b/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.yaml
index abcf0f54482..066929a10a6 100644
--- a/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.yaml
+++ b/boards/ezurio/bl54l15_dvk/bl54l15_dvk_nrf54l15_cpuapp.yaml
@@ -11,7 +11,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.dts b/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.dts
index 7ea5099aa3f..00ffc3f5449 100644
--- a/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.dts
+++ b/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.dts
@@ -20,41 +20,5 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.yaml b/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.yaml
index 264368c2baf..d210534c8b5 100644
--- a/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.yaml
+++ b/boards/ezurio/bl54l15u_dvk/bl54l15u_dvk_nrf54l15_cpuapp.yaml
@@ -11,7 +11,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.dts b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.dts
index b2d96daa192..6e662902561 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.dts
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.dts
@@ -19,42 +19,5 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.yaml b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.yaml
index 3fbfefe01a3..e23a2a0073a 100644
--- a/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.yaml
+++ b/boards/nordic/nrf54l15dk/nrf54l15dk_nrf54l15_cpuapp.yaml
@@ -10,7 +10,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.dts b/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.dts
index c79847a3b57..04616affd14 100644
--- a/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.dts
+++ b/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.dts
@@ -19,41 +19,5 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.yaml b/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.yaml
index e911ee9e54c..db252d56047 100644
--- a/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.yaml
+++ b/boards/panasonic/panb511evb/panb511evb_nrf54l15_cpuapp.yaml
@@ -10,7 +10,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.dts b/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.dts
index d9362a6ddb0..d347ef16ac1 100644
--- a/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.dts
+++ b/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.dts
@@ -21,41 +21,5 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.yaml b/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.yaml
index 4e3b9067475..7a5e9a84f96 100644
--- a/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.yaml
+++ b/boards/raytac/an54l15q_db/raytac_an54l15q_db_nrf54l15_cpuapp.yaml
@@ -12,7 +12,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.dts b/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.dts
index 73b135891a8..2380fcd5b8d 100644
--- a/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.dts
+++ b/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.dts
@@ -26,46 +26,6 @@
 	};
 };
 
-&cpuapp_rram {
-	partitions {
-		compatible = "fixed-partitions";
-
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x0 DT_SIZE_K(64)>;
-		};
-
-		slot0_partition: partition@10000 {
-			label = "image-0";
-			reg = <0x10000 DT_SIZE_K(324)>;
-		};
-
-		slot0_ns_partition: partition@61000 {
-			label = "image-0-nonsecure";
-			reg = <0x61000 DT_SIZE_K(324)>;
-		};
-
-		slot1_partition: partition@b2000 {
-			label = "image-1";
-			reg = <0xb2000 DT_SIZE_K(324)>;
-		};
-
-		slot1_ns_partition: partition@103000 {
-			label = "image-1-nonsecure";
-			reg = <0x103000 DT_SIZE_K(324)>;
-		};
-
-		/* 32k from 0x154000 to 0x15bfff reserved for TF-M partitions */
-		storage_partition: partition@15c000 {
-			label = "storage";
-			reg = <0x15c000 DT_SIZE_K(36)>;
-		};
-	};
-};
-
 &cpuapp_sram {
 	status = "okay";
 };
@@ -172,3 +132,6 @@
 &adc {
 	status = "okay";
 };
+
+/* Include default memory partition configuration file */
+#include <nordic/nrf54l15_partition.dtsi>
diff --git a/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.yaml b/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.yaml
index 87fee9c3d62..6e8bd507277 100644
--- a/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.yaml
+++ b/boards/we/ophelia4ev/ophelia4ev_nrf54l15_cpuapp.yaml
@@ -10,7 +10,7 @@ toolchain:
   - zephyr
 sysbuild: true
 ram: 188
-flash: 324
+flash: 1428
 supported:
   - adc
   - counter
diff --git a/dts/vendor/nordic/nrf54l15_partition.dtsi b/dts/vendor/nordic/nrf54l15_partition.dtsi
new file mode 100644
index 00000000000..4988de3ed54
--- /dev/null
+++ b/dts/vendor/nordic/nrf54l15_partition.dtsi
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&cpuapp_rram {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(64)>;
+		};
+
+		slot0_partition: partition@10000 {
+			label = "image-0";
+			reg = <0x10000 DT_SIZE_K(664)>;
+		};
+
+		slot1_partition: partition@b6000 {
+			label = "image-1";
+			reg = <0xb6000 DT_SIZE_K(664)>;
+		};
+
+		storage_partition: partition@15c000 {
+			label = "storage";
+			reg = <0x15c000 DT_SIZE_K(36)>;
+		};
+	};
+};