applications: nrf_desktop: enable zms for nrf54h20 DK target

Enabled the ZMS file system for the nRF54H20 DK in the nRF Desktop
application. All board targets with the MRAM technology now use ZMS
by default.

Ref: NCSDK-30319

Signed-off-by: Kamil Piszczek <[email protected]>

Author: kapi-no

applications/nrf_desktop/doc/settings_loader.rst

@@ -33,7 +33,11 @@ For details on the default configuration alignment, see the following sections.
 Settings backend
 ================
 
-By default, nRF Desktop devices use non-volatile storage settings backend (:kconfig:option:`CONFIG_SETTINGS_NVS`).
+By default, the nRF Desktop application, depending on the non-volatile memory technology used by the device, uses one of the following settings backends:
+
+* :ref:`Zephyr Memory Storage (ZMS) <zephyr:zms_api>` - Used for the devices with non-volatile memory that do not require explicit erase (MRAM, RRAM).
+* :ref:`Non-Volatile Storage (NVS) <zephyr:nvs_api>` - Used for the devices with non-volatile memory that require explicit erase (FLASH).
+
 The storage partition is located in the internal non-volatile memory.
 
 Settings load in a separate thread

applications/nrf_desktop/src/modules/Kconfig.caf_settings_loader.default

@@ -10,8 +10,8 @@ config DESKTOP_SETTINGS_LOADER
 	bool "Settings loader module (CAF)"
 	select CAF_SETTINGS_LOADER
 	select SETTINGS
-	imply ZMS if SOC_FLASH_NRF_RRAM
-	imply NVS if !SOC_FLASH_NRF_RRAM
+	imply ZMS if (SOC_FLASH_NRF_RRAM || SOC_FLASH_NRF_MRAM)
+	imply NVS if !(SOC_FLASH_NRF_RRAM || SOC_FLASH_NRF_MRAM)
 	imply FLASH
 	imply FLASH_MAP
 	imply FLASH_PAGE_LAYOUT
@@ -23,8 +23,8 @@ config DESKTOP_SETTINGS_LOADER
 	  By default, nRF Desktop application, depending on the non-volatile
 	  memory technology used by the device, uses either the Zephyr Memory
 	  Storage (ZMS) or Non-Volatile Storage (NVS) settings backend.
-	  ZMS is used for the devices with the RRAM non-volatile memory that
-	  do not require explicit erase. Otherwise, the NVS is used.
+	  ZMS is used for the devices with the RRAM or MRAM non-volatile memory
+	  that do not require explicit erase. Otherwise, the NVS is used.
 
 if DESKTOP_SETTINGS_LOADER
 

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

@@ -203,7 +203,11 @@ nRF5340 Audio
 nRF Desktop
 -----------
 
-* Updated the :ref:`zephyr:nrf54h20dk_nrf54h20` release configuration to enable the :ref:`nrf_desktop_watchdog`.
+* Updated:
+
+  * The :ref:`nrf_desktop_settings_loader` to make the :ref:`Zephyr Memory Storage (ZMS) <zephyr:zms_api>` the default settings backend for all board targets that use the MRAM technology.
+    As a result, all :ref:`zephyr:nrf54h20dk_nrf54h20` configurations were migrated from the NVS settings backend to the ZMS settings backend.
+  * The :ref:`zephyr:nrf54h20dk_nrf54h20` release configuration to enable the :ref:`nrf_desktop_watchdog`.
 
 nRF Machine Learning (Edge Impulse)
 -----------------------------------