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samples: dfu: Add nrf54lm20b support to DFU samples
Add nrf54lm20dk/nrf54lm20b/cpuapp to Twister platform lists and board-specific overlays and sysbuild MCUboot configuration for single_slot, smp_svr, compressed_update, and mcuboot_with_encryption. Memory layout matches the existing nrf54lm20a definitions. Signed-off-by: Artur Hadasz <artur.hadasz@nordicsemi.no>
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‎samples/dfu/compressed_update/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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/*
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* Copyright (c) 2026 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/delete-node/ &boot_partition;
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/delete-node/ &slot0_partition;
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/delete-node/ &slot1_partition;
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/delete-node/ &storage_partition;
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&cpuapp_rram {
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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boot_partition: partition@0 {
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label = "mcuboot";
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reg = <0x00000000 0x00010000>;
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};
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slot0_partition: partition@10000 {
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label = "image-0";
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reg = <0x00010000 0x00123000>;
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};
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slot1_partition: partition@133000 {
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label = "image-1";
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reg = <0x00133000 0x000a2000>;
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};
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storage_partition: partition@1d5000 {
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label = "storage";
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reg = <0x001d5000 0x00010000>;
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};
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};
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};

‎samples/dfu/compressed_update/sample.yaml‎

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- nrf5340dk/nrf5340/cpuapp
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp
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- nrf54lv10dk/nrf54lv10a/cpuapp
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integration_platforms:
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- nrf52840dk/nrf52840
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- nrf5340dk/nrf5340/cpuapp
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp
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- nrf54lv10dk/nrf54lv10a/cpuapp

‎samples/dfu/compressed_update/sysbuild/mcuboot/boards/nrf54lm20dk_nrf54lm20b_cpuapp.conf‎

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#
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# Copyright (c) 2026 Nordic Semiconductor ASA
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#
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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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#
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# Ensure that the SPI NOR driver is disabled by default
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CONFIG_SPI_NOR=n
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# TODO: below are not yet supported and need fixing
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CONFIG_FPROTECT=n
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CONFIG_BOOT_WATCHDOG_FEED=n

‎samples/dfu/compressed_update/sysbuild/mcuboot/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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#include "../../../boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay"
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#include "../app.overlay"

‎samples/dfu/mcuboot_with_encryption/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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/*
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* Copyright (c) 2026 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/delete-node/ &boot_partition;
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/delete-node/ &slot0_partition;
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/delete-node/ &slot1_partition;
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&cpuapp_rram {
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partitions {
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boot_partition: partition@0 {
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label = "mcuboot";
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reg = <0x0 DT_SIZE_K(72)>;
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};
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slot0_partition: partition@12000 {
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label = "image-0";
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reg = <0x12000 DT_SIZE_K(916)>;
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};
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slot1_partition: partition@f7000 {
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label = "image-1";
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reg = <0xf7000 DT_SIZE_K(916)>;
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};
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};
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};

‎samples/dfu/mcuboot_with_encryption/sample.yaml‎

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platform_allow:
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp
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- nrf54lv10dk/nrf54lv10a/cpuapp
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integration_platforms:
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp
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- nrf54lv10dk/nrf54lv10a/cpuapp
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sample.mcuboot_with_encryption.multicore:

‎samples/dfu/mcuboot_with_encryption/sysbuild/mcuboot/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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/*
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* Copyright (c) 2026 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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#include "../../../boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay"
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/* Need to add this here as the app.overlay is not picked
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* with board overlay.
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*/
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/ {
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chosen {
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zephyr,code-partition = &boot_partition;
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};
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};

‎samples/dfu/single_slot/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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/*
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* Copyright (c) 2026 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/delete-node/ &boot_partition;
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/delete-node/ &slot0_partition;
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/delete-node/ &slot1_partition;
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/delete-node/ &storage_partition;
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&cpuapp_rram {
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reg = <0x0 DT_SIZE_K(1940)>;
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partitions {
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boot_partition: partition@0 {
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label = "mcuboot";
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reg = <0x0 DT_SIZE_K(24)>;
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};
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slot0_partition: partition@6000 {
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label = "image-0";
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reg = <0x6000 DT_SIZE_K(1784)>;
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};
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slot1_partition: partition@1c4000 {
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label = "image-1";
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reg = <0x1c4000 DT_SIZE_K(116)>;
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};
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storage_partition: partition@1e1000 {
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label = "storage";
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reg = <0x1e1000 DT_SIZE_K(16)>;
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};
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};
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};

‎samples/dfu/single_slot/sample.yaml‎

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- nrf54h20dk/nrf54h20/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54ls05dk/nrf54ls05b/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp
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integration_platforms:
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54h20dk/nrf54h20/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54ls05dk/nrf54ls05b/cpuapp
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- nrf54lm20dk/nrf54lm20b/cpuapp

‎samples/dfu/single_slot/sysbuild/ble_mcumgr/boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay‎

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/*
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* Copyright (c) 2026 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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#include "../../../boards/nrf54lm20dk_nrf54lm20b_cpuapp.overlay"

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