applications: nrf_desktop: Deprecate Partition Manager for nRF54LM20A

maje-emb · rlubos · commit ed779ee51216 · 2026-05-05T10:23:06.000+02:00
Deprecated Partition Manager for nrf54lm20dk/nRF54LM20A target.
Now memory map is configured through DTS. The old Partition
Manager configurations are still supported.

The change affects the following configuration variants:
- debug (prj.conf)
- llvm (prj_llvm.conf)
- release (prj_release.conf)

Ref: NCSDK-38504

Signed-off-by: Marcin Jelinski &lt;marcin.jelinski@nordicsemi.no&gt;
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app.overlay
@@ -1,16 +1,12 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+#include "memory_map.dtsi"
 #include "app_common.dtsi"
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
-};
-
 / {
 	hid_dev_0: hid_dev_0 {
 		compatible = "zephyr,hid-device";
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_common.dtsi b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_common.dtsi
@@ -1,9 +1,11 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+secondary_app_partition: &slot1_partition {};
+
 / {
 	/* Disable pwmleds and redefine them to align configuration with CAF LEDs requirements. */
 	/delete-node/ pwmleds;
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_llvm.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_llvm.overlay
@@ -1,16 +1,12 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+#include "memory_map_llvm.dtsi"
 #include "app_common.dtsi"
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
-};
-
 / {
 	hid_dev_0: hid_dev_0 {
 		compatible = "zephyr,hid-device";
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_release.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/app_release.overlay
@@ -1,16 +1,12 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+#include "memory_map.dtsi"
 #include "app_common.dtsi"
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
-};
-
 / {
 	hid_dev_0: hid_dev_0 {
 		compatible = "zephyr,hid-device";
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app.overlay
@@ -1,10 +1,16 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
+#include "../../memory_map.dtsi"
+
+/* The nRF54LM20 DK defines memory map using DTS.
+ * Assign the bootloader partition to MCUboot image.
+ */
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
 };
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app_llvm.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app_llvm.overlay
@@ -1,10 +1,16 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
+#include "../../memory_map_llvm.dtsi"
+
+/* The nRF54LM20 DK defines memory map using DTS.
+ * Assign the bootloader partition to MCUboot image.
+ */
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
 };
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app_release.overlay b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/app_release.overlay
@@ -1,10 +1,16 @@
 /*
- * Copyright (c) 2025 Nordic Semiconductor ASA
+ * Copyright (c) 2025-2026 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
-/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
-&cpuapp_rram {
-	reg = <0x0 DT_SIZE_K(2036)>;
+#include "../../memory_map.dtsi"
+
+/* The nRF54LM20 DK defines memory map using DTS.
+ * Assign the bootloader partition to MCUboot image.
+ */
+/ {
+	chosen {
+		zephyr,code-partition = &boot_partition;
+	};
 };
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -8,7 +8,6 @@ CONFIG_SIZE_OPTIMIZATIONS=y
 CONFIG_HW_STACK_PROTECTION=y
 
 CONFIG_MAIN_STACK_SIZE=10240
-CONFIG_BOOT_MAX_IMG_SECTORS=256
 CONFIG_BOOT_BOOTSTRAP=n
 
 CONFIG_BOOT_VERSION_CMP_USE_BUILD_NUMBER=y
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj_llvm.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj_llvm.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -8,7 +8,6 @@ CONFIG_SIZE_OPTIMIZATIONS_AGGRESSIVE=y
 CONFIG_HW_STACK_PROTECTION=y
 
 CONFIG_MAIN_STACK_SIZE=10240
-CONFIG_BOOT_MAX_IMG_SECTORS=256
 CONFIG_BOOT_BOOTSTRAP=n
 
 CONFIG_BOOT_VERSION_CMP_USE_BUILD_NUMBER=y
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj_release.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/images/mcuboot/prj_release.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -8,8 +8,6 @@ CONFIG_SIZE_OPTIMIZATIONS=y
 CONFIG_HW_STACK_PROTECTION=y
 
 CONFIG_MAIN_STACK_SIZE=10240
-
-CONFIG_BOOT_MAX_IMG_SECTORS=256
 CONFIG_BOOT_BOOTSTRAP=n
 
 CONFIG_BOOT_VERSION_CMP_USE_BUILD_NUMBER=y
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/memory_map.dtsi b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/memory_map.dtsi
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+&cpuapp_rram {
+	/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
+	reg = <0x0 DT_SIZE_K(2036)>;
+
+	/delete-node/ partitions;
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(20)>;
+		};
+
+		slot0_partition: partition@5000 {
+			label = "image-0";
+			reg = <0x5000 DT_SIZE_K(1000)>;
+		};
+
+		slot1_partition: partition@ff000 {
+			label = "image-1";
+			reg = <0xff000 DT_SIZE_K(1000)>;
+		};
+
+		storage_partition: partition@1f9000 {
+			label = "storage";
+			reg = <0x1f9000 DT_SIZE_K(16)>;
+		};
+	};
+};
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/memory_map_llvm.dtsi b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/memory_map_llvm.dtsi
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+&cpuapp_rram {
+	/* Application does not use cpuflpr core. Assign whole RRAM to cpuapp. */
+	reg = <0x0 DT_SIZE_K(2036)>;
+
+	/delete-node/ partitions;
+
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(28)>;
+		};
+
+		slot0_partition: partition@7000 {
+			label = "image-0";
+			reg = <0x7000 DT_SIZE_K(996)>;
+		};
+
+		slot1_partition: partition@100000 {
+			label = "image-1";
+			reg = <0x100000 DT_SIZE_K(996)>;
+		};
+
+		storage_partition: partition@1f9000 {
+			label = "storage";
+			reg = <0x1f9000 DT_SIZE_K(16)>;
+		};
+	};
+};
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -115,6 +115,9 @@ CONFIG_SPI_NOR=n
 # timeouts in flash_sync_mpsl.
 CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=8
 
+# Enable code partitioning with DTS
+CONFIG_USE_DT_CODE_PARTITION=y
+
 ################################################################################
 
 CONFIG_ASSERT=y
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj_llvm.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj_llvm.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -119,6 +119,9 @@ CONFIG_SPI_NOR=n
 # timeouts in flash_sync_mpsl.
 CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=8
 
+# Enable code partitioning with DTS
+CONFIG_USE_DT_CODE_PARTITION=y
+
 ################################################################################
 
 CONFIG_ASSERT=y
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj_release.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/prj_release.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -111,6 +111,9 @@ CONFIG_SPI_NOR=n
 # timeouts in flash_sync_mpsl.
 CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=8
 
+# Enable code partitioning with DTS
+CONFIG_USE_DT_CODE_PARTITION=y
+
 ################################################################################
 # Disable unused features
 
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -12,3 +12,5 @@ SB_CONFIG_BOOT_SIGNATURE_TYPE_PURE=y
 SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${APPLICATION_CONFIG_DIR}/images/mcuboot/mcuboot_private.pem"
 SB_CONFIG_MCUBOOT_SIGNATURE_USING_KMU=y
 SB_CONFIG_MCUBOOT_GENERATE_DEFAULT_KEY_FILE=y
+
+SB_CONFIG_PARTITION_MANAGER=n
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild_llvm.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild_llvm.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -12,3 +12,5 @@ SB_CONFIG_BOOT_SIGNATURE_TYPE_PURE=y
 SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${APPLICATION_CONFIG_DIR}/images/mcuboot/mcuboot_private.pem"
 SB_CONFIG_MCUBOOT_SIGNATURE_USING_KMU=y
 SB_CONFIG_MCUBOOT_GENERATE_DEFAULT_KEY_FILE=y
+
+SB_CONFIG_PARTITION_MANAGER=n
diff --git a/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild_release.conf b/applications/nrf_desktop/configuration/nrf54lm20dk_nrf54lm20a_cpuapp/sysbuild_release.conf
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2025 Nordic Semiconductor ASA
+# Copyright (c) 2025-2026 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -12,3 +12,5 @@ SB_CONFIG_BOOT_SIGNATURE_TYPE_PURE=y
 SB_CONFIG_BOOT_SIGNATURE_KEY_FILE="\${APPLICATION_CONFIG_DIR}/images/mcuboot/mcuboot_private.pem"
 SB_CONFIG_MCUBOOT_SIGNATURE_USING_KMU=y
 SB_CONFIG_MCUBOOT_GENERATE_DEFAULT_KEY_FILE=y
+
+SB_CONFIG_PARTITION_MANAGER=n

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`#`
`2`		`-# Copyright (c) 2025 Nordic Semiconductor ASA`
	`2`	`+# Copyright (c) 2025-2026 Nordic Semiconductor ASA`
`3`	`3`	`#`
`4`	`4`	`# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause`
`5`	`5`	`#`
`@@ -8,7 +8,6 @@ CONFIG_SIZE_OPTIMIZATIONS=y`
`8`	`8`	`CONFIG_HW_STACK_PROTECTION=y`
`9`	`9`
`10`	`10`	`CONFIG_MAIN_STACK_SIZE=10240`
`11`		`-CONFIG_BOOT_MAX_IMG_SECTORS=256`
`12`	`11`	`CONFIG_BOOT_BOOTSTRAP=n`
`13`	`12`
`14`	`13`	`CONFIG_BOOT_VERSION_CMP_USE_BUILD_NUMBER=y`