samples: Disable Partition Manager

Disable PM and add DTS changes to samples.

Signed-off-by: Markus Lassila <markus.lassila@nordicsemi.no>

Author: MarkusLassila

samples/sm_at_client_shell/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

@@ -33,3 +33,32 @@
 		ri-gpios = <&gpio1 12 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
 	};
 };
+
+
+/*
+ * Flash partition layout for nRF54L15 DK
+ *
+ * 0x0000_0000  slot0 (primary app)          (1492 kB)
+ * 0x0017_5000  Non-secure storage           ( 32 kB)
+ */
+
+/delete-node/ &boot_partition;
+/delete-node/ &slot0_partition;
+/delete-node/ &slot1_partition;
+/delete-node/ &storage_partition;
+
+&cpuapp_rram {
+	partitions {
+		slot0_partition: partition@0 {
+			compatible = "zephyr,mapped-partition";
+			label = "image-0";
+			reg = <0x0 DT_SIZE_K(1492)>;
+		};
+
+		storage_partition: partition@175000 {
+			compatible = "zephyr,mapped-partition";
+			label = "storage";
+			reg = <0x000175000 DT_SIZE_K(32)>;
+		};
+	};
+};

samples/sm_at_client_shell/prj.conf

@@ -31,4 +31,7 @@ CONFIG_SM_AT_CLIENT=y
 CONFIG_SM_AT_CLIENT_SHELL=y
 CONFIG_SM_AT_CLIENT_LOG_LEVEL_INF=y
 
+# Ensure the use of the DTS partitions
+CONFIG_USE_DT_CODE_PARTITION=y
+
 CONFIG_ASSERT=y

samples/sm_at_client_shell/sysbuild.conf

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2026 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Disable the partition manager. Use DTS to define the partitions.
+SB_CONFIG_PARTITION_MANAGER=n
+
+# Disable MCUboot.
+SB_CONFIG_BOOTLOADER_MCUBOOT=n

samples/sm_ppp_shell/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

@@ -53,3 +53,33 @@
 &gpio1 {
 	status = "okay";
 };
+
+/* Using default SRAM partitions from nrf54l15_cpuapp_partition.dtsi */
+
+/*
+ * RRAM partition layout for nRF54L15 DK (disable MCUboot)
+ *
+ * 0x0000_0000  slot0 (primary app)          (1492 kB)
+ * 0x0017_5000  Non-secure storage           ( 32 kB)
+ */
+
+/delete-node/ &boot_partition;
+/delete-node/ &slot0_partition;
+/delete-node/ &slot1_partition;
+/delete-node/ &storage_partition;
+
+&cpuapp_rram {
+	partitions {
+		slot0_partition: partition@0 {
+			compatible = "zephyr,mapped-partition";
+			label = "image-0";
+			reg = <0x0 DT_SIZE_K(1492)>;
+		};
+
+		storage_partition: partition@175000 {
+			compatible = "zephyr,mapped-partition";
+			label = "storage";
+			reg = <0x000175000 DT_SIZE_K(32)>;
+		};
+	};
+};

samples/sm_ppp_shell/boards/nrf54l15dk_nrf54l15_cpuapp_ns.overlay

@@ -53,3 +53,7 @@
 &gpio1 {
 	status = "okay";
 };
+
+/* Using default RRAM and SRAM partitions from nrf54l15_cpuapp_ns_partition.dtsi.
+ * The nrf54l15_cpuapp_ns_partition.dtsi does not define partition for MCUboot by default.
+ */

samples/sm_ppp_shell/prj.conf

@@ -53,6 +53,9 @@ CONFIG_PM_DEVICE_SHELL=y
 CONFIG_NET_MGMT_EVENT_MONITOR=y
 CONFIG_NET_MGMT_EVENT_MONITOR_AUTO_START=y
 
+# Ensure the use of the DTS partitions
+CONFIG_USE_DT_CODE_PARTITION=y
+
 # Logging
 CONFIG_LOG=y
 CONFIG_MODEM_LOG_LEVEL_DBG=y

samples/sm_ppp_shell/sysbuild.conf

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2026 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Disable the partition manager. Use DTS to define the partitions.
+SB_CONFIG_PARTITION_MANAGER=n
+
+# Disable MCUboot.
+SB_CONFIG_BOOTLOADER_MCUBOOT=n