applications: nrf_desktop: doc: dfu: align with IronSide SE

Updated the DFU application module that is part of the nRF Desktop
application to align with the IronSide SE architecture for the nRF54H20
SoC.

Ref: NCSDK-35488

Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>

Author: kapi-no

applications/nrf_desktop/doc/dfu.rst

@@ -27,7 +27,7 @@ Configuration
 
 You can use this module for the following devices:
 
-* nRF52, nRF53, and nRF54L Series - To perform the firmware upgrade, you must enable the bootloader.
+* nRF52, nRF53, and nRF54 Series - To perform the firmware upgrade, you must enable the bootloader.
   You can use the DFU module with either MCUboot or B0 bootloader.
   For more information on how to enable and configure a bootloader, see the :ref:`nrf_desktop_bootloader` section.
 
@@ -62,6 +62,17 @@ If the option is enabled, the DFU module reports the ``MCUBOOT+XIP`` bootloader
 The option depends on enabling the MCUboot bootloader (:kconfig:option:`CONFIG_BOOTLOADER_MCUBOOT`) and is enabled by default if the MCUboot direct-xip mode of operations is set (:kconfig:option:`CONFIG_MCUBOOT_BOOTLOADER_MODE_DIRECT_XIP`).
 See the :ref:`nrf_desktop_bootloader` section for more information on the MCUboot bootloader configuration.
 
+Partitioning methods
+====================
+
+The DFU module is compatible with the memory layout defined using the Partition Manager.
+This partitioning method is used by default for most board targets that are based on the nRF52, nRF53, and nRF54 Series SoCs.
+
+Additionally, the DFU module is compatible with the memory layout defined using the Device Tree Source (DTS) when it is used with the MCUboot bootloader.
+This is the only partitioning method that is supported for board targets based on the nRF54H Series SoC.
+
+For more details about the memory layout methods, see the :ref:`nrf_desktop_memory_layout` documentation.
+
 Device identification information
 =================================
 
@@ -135,16 +146,6 @@ fwinfo
    * Version and length of the image.
    * Partition ID of the currently booted image, used to specify the image placement.
 
-   Additionally, for the nRF54H Series, the following applies:
-
-   * The reported image size is set to zero.
-   * The booted image version is indicated by:
-
-     * Root manifest sequence number that is encoded in the build number field.
-     * Manifest semantic version, if supported by the SDFW (requires v0.6.2 or higher).
-       The semantic version is encoded in the major, minor and patch fields.
-       If semantic versioning is not supported, these fields are set to zero.
-
 .. _dfu_devinfo:
 
 devinfo

doc/nrf/releases_and_maturity/releases/release-notes-changelog.rst

@@ -276,6 +276,9 @@ nRF5340 Audio
 nRF Desktop
 -----------
 
+  * Added support for the DTS-based memory layout in the :ref:`nrf_desktop_dfu`.
+    This layout is only supported for the MCUboot bootloader.
+
   * Updated:
 
     * The memory layouts for the ``nrf54lm20dk/nrf54lm20a/cpuapp`` board target to make more space for the application code.
@@ -311,9 +314,9 @@ nRF Desktop
     * The :ref:`nrf_desktop_hid_state_pm` to skip submitting the :c:struct:`keep_alive_event` if the :c:enum:`POWER_MANAGER_LEVEL_ALIVE` power level is enforced by any application module through the :c:struct:`power_manager_restrict_event`.
       This is done to improve performance.
     * The documentation of the :ref:`nrf_desktop_hid_state` and default HID report providers to simplify getting started with updating HID input reports used by the application or introducing support for a new HID input report.
-    * The :ref:`nrf_desktop_dfu_mcumgr` to handle the ``nrf54h20dk/nrf54h20/cpuapp`` board target with the IronSide SE architecture and the MCUboot bootloader.
+    * The :ref:`nrf_desktop_dfu` and the :ref:`nrf_desktop_dfu_mcumgr` to handle the ``nrf54h20dk/nrf54h20/cpuapp`` board target with the IronSide SE architecture and the MCUboot bootloader.
 
-  * Removed the SUIT support from the :ref:`nrf_desktop_dfu_mcumgr`.
+  * Removed the SUIT support from the :ref:`nrf_desktop_dfu` and the :ref:`nrf_desktop_dfu_mcumgr`.
 
 nRF Machine Learning (Edge Impulse)
 -----------------------------------