mcumgr/grp/os_mgmt: hook for disabling BT on nrf54Lx

Added hook implementation for disabling Bluetooth in the hook
of MCUmgr OS reboot command.
Disabling of bluetooth allow to restart it properly after the
warm boot.

This include uninit of MPSL, so also
added possibility to avoid uninit of MPSL twice as
If CONFIG_BT_UNINIT_MPSL_ON_DISABLE is enabled MPSL is
uninitialized automatically once BT get uninitialized.

Also postpone disabling BT till half of waiting of reset time while
multi-threading is enabled. This gives better UX as MCUmgr server will
be able to response to the client.

Ref: NCSDK-36564

Signed-off-by: Andrzej Puzdrowski <[email protected]>

Author: nvlsianpu

subsys/mgmt/mcumgr/grp/os_mgmt/CMakeLists.txt

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor ASA
+# Copyright (c) 2024-2025 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -8,3 +8,8 @@ if(CONFIG_MCUMGR_GRP_OS_BOOTLOADER_INFO_B0_ACTIVE_SLOT)
   zephyr_library_amend()
   zephyr_library_sources(src/os_mgmt_b0_active_slot.c)
 endif()
+
+if(CONFIG_MCUMGR_GRP_OS_REBOOT_BT)
+  zephyr_library_amend()
+  zephyr_library_sources(src/os_mgmt_reboot_bt.c)
+endif()

subsys/mgmt/mcumgr/grp/os_mgmt/Kconfig

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024 Nordic Semiconductor ASA
+# Copyright (c) 2024-2025 Nordic Semiconductor ASA
 #
 # SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 #
@@ -19,4 +19,13 @@ config MCUMGR_GRP_OS_BOOTLOADER_INFO_B0_ACTIVE_SLOT
 	  Enables a bootloader info command for `active_b0_slot` which will return the active b0
 	  image slot number, and can be used to determine which update image should be loaded.
 
+config MCUMGR_GRP_OS_REBOOT_BT
+	bool
+	default y
+	depends on MCUMGR_GRP_OS
+	depends on (BT || MPSL)
+	depends on SOC_SERIES_NRF54LX
+	select MCUMGR_MGMT_NOTIFICATION_HOOKS
+	select MCUMGR_GRP_OS_RESET_HOOK
+
 endmenu

subsys/mgmt/mcumgr/grp/os_mgmt/src/os_mgmt_reboot_bt.c

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+#include <zcbor_common.h>
+#include <zcbor_encode.h>
+#include <zephyr/mgmt/mcumgr/mgmt/callbacks.h>
+#include <zephyr/mgmt/mcumgr/grp/os_mgmt/os_mgmt.h>
+#include <zephyr/logging/log.h>
+
+#ifdef CONFIG_BT
+#include <zephyr/bluetooth/bluetooth.h>
+#endif
+#ifdef CONFIG_MPSL
+#include <mpsl.h>
+#endif
+
+LOG_MODULE_REGISTER(os_mgmt_reboot_bt, CONFIG_MCUMGR_GRP_OS_LOG_LEVEL);
+
+#ifdef CONFIG_MULTITHREADING
+static void bt_disable_work_handler(struct k_work *work);
+
+static K_WORK_DELAYABLE_DEFINE(bt_disable_work, bt_disable_work_handler);
+
+static void bt_disable_work_handler(struct k_work *work)
+{
+	ARG_UNUSED(work);
+
+#ifdef CONFIG_BT
+	int err_rc = bt_disable();
+
+	if (err_rc) {
+		LOG_ERR("BT disable failed before reboot: %d", err_rc);
+	}
+#endif
+#if defined(CONFIG_MPSL) && !defined(CONFIG_BT_UNINIT_MPSL_ON_DISABLE)
+	mpsl_uninit();
+#endif
+}
+#endif
+
+static enum mgmt_cb_return reboot_bt_hook(uint32_t event, enum mgmt_cb_return prev_status,
+					  int32_t *rc, uint16_t *group, bool *abort_more,
+					  void *data, size_t data_size)
+{
+	struct os_mgmt_reset_data *reboot_data = (struct os_mgmt_reset_data *)data;
+
+	if (event != MGMT_EVT_OP_OS_MGMT_RESET || data_size != sizeof(*reboot_data)) {
+		*rc = MGMT_ERR_EUNKNOWN;
+		return MGMT_CB_ERROR_RC;
+	}
+#ifdef CONFIG_MULTITHREADING
+	/* disable bluetooth from the system workqueue thread. */
+	k_work_schedule(&bt_disable_work, K_MSEC(CONFIG_MCUMGR_GRP_OS_RESET_MS/2));
+#else
+#ifdef CONFIG_BT
+	int err_rc = bt_disable();
+
+	if (err_rc) {
+		LOG_ERR("BT disable failed before reboot: %d", err_rc);
+	}
+#endif
+#if defined(CONFIG_MPSL) && !defined(CONFIG_BT_UNINIT_MPSL_ON_DISABLE)
+	mpsl_uninit();
+#endif
+#endif
+
+	return MGMT_CB_OK;
+}
+
+static struct mgmt_callback cmd_reboot_bt_info_cb  = {
+	.callback = reboot_bt_hook,
+	.event_id = MGMT_EVT_OP_OS_MGMT_RESET,
+};
+
+static int os_mgmt_register_reboot_bt(void)
+{
+	mgmt_callback_register(&cmd_reboot_bt_info_cb);
+	return 0;
+}
+
+SYS_INIT(os_mgmt_register_reboot_bt, APPLICATION, 0);