samples: matter: Disabled RAM power down for nRF5340 DK

Disabled RAM power down for nRF5340 DK release configuration
due to DFU failures.

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

doc/nrf/releases_and_maturity/known_issues.rst

@@ -491,6 +491,19 @@ Matter
 
 The issues in this section are related to the :ref:`ug_matter` protocol.
 
+.. rst-class:: v2-9-0
+
+KRKNWK-19826: The Device Firmware Upgrade (DFU) fails for nRF5340 DK with RAM power down enabled
+  The DFU fails for nRF5340 DK, if the application enables the :kconfig:option:`CONFIG_RAM_POWER_DOWN_LIBRARY` Kconfig option.
+  This option is enabled by default for the ``release`` configuration of the following samples:
+
+    * :ref:`Matter door lock sample <matter_lock_sample>`
+    * :ref:`Matter light switch sample <matter_light_switch_sample>`
+    * :ref:`Matter smoke CO alarm <matter_smoke_co_alarm_sample>`
+    * :ref:`Matter window covering sample <matter_window_covering_sample>`
+
+  **Workaround:** Set the :kconfig:option:`CONFIG_RAM_POWER_DOWN_LIBRARY` Kconfig option to ``n`` in the application :file:`prj_release.conf` file of the application.
+
 .. rst-class:: v2-9-0-nRF54H20-rc1 v2-9-0 v2-8-0
 
 KRKNWK-19388: The smart plug functionality of Matter Bridge application does not work with Apple Home application

samples/matter/light_switch/boards/nrf5340dk_nrf5340_cpuapp_release.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Do not enable RAM power-down library for nRF5340 DK due to DFU failures.
+CONFIG_RAM_POWER_DOWN_LIBRARY=n

samples/matter/lock/boards/nrf5340dk_nrf5340_cpuapp_release.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Do not enable RAM power-down library for nRF5340 DK due to DFU failures.
+CONFIG_RAM_POWER_DOWN_LIBRARY=n

samples/matter/smoke_co_alarm/boards/nrf5340dk_nrf5340_cpuapp_release.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Do not enable RAM power-down library for nRF5340 DK due to DFU failures.
+CONFIG_RAM_POWER_DOWN_LIBRARY=n

samples/matter/window_covering/boards/nrf5340dk_nrf5340_cpuapp_release.conf

@@ -0,0 +1,8 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+# Do not enable RAM power-down library for nRF5340 DK due to DFU failures.
+CONFIG_RAM_POWER_DOWN_LIBRARY=n