[nrfconnect] Refactored configuration for child images (#17174)

Currently used approach for nrfconnect regarding child images
results in significant duplication of configuration files,
what hardens maintenance.

* Created Kconfig.mcuboot.defaults file that sets default
configuration for all examples using mcuboot child image
* Created Kconfig.multiprotocol_rpmsg file that sets
default configuration for all examples using multiprotocol
rpmsg child image
* Flatten configuration structure by removing
configuration/board-name/ files and creating common prj.confs
in the application root directory
* Removed from rpc.overlay comment describing how to use it,
as it duplicates example README.md information

.github/workflows/examples-nrfconnect.yaml

@@ -104,7 +104,7 @@ jobs:
               if: github.event_name == 'push' || steps.changed_paths.outputs.nrfconnect == 'true'
               timeout-minutes: 10
               run: |
-                  scripts/examples/nrfconnect_example.sh lighting-app nrf52840dongle_nrf52840 -DCONFIG_CHIP_ROTATING_DEVICE_ID=y
+                  scripts/examples/nrfconnect_example.sh lighting-app nrf52840dongle_nrf52840 -DCONF_FILE=prj_no_dfu.conf -DCONFIG_CHIP_ROTATING_DEVICE_ID=y
                   .environment/pigweed-venv/bin/python3 scripts/tools/memory/gh_sizes.py \
                     nrfconnect nrf52840dongle_nrf52840 lighting-app \
                     examples/lighting-app/nrfconnect/build/zephyr/zephyr.elf \
@@ -113,7 +113,7 @@ jobs:
               if: github.event_name == 'push' || steps.changed_paths.outputs.nrfconnect == 'true'
               timeout-minutes: 20
               run: |
-                  scripts/examples/nrfconnect_example.sh lighting-app nrf52840dk_nrf52840 -DOVERLAY_CONFIG=../../rpc.overlay
+                  scripts/examples/nrfconnect_example.sh lighting-app nrf52840dk_nrf52840 -DOVERLAY_CONFIG=rpc.overlay
                   .environment/pigweed-venv/bin/python3 scripts/tools/memory/gh_sizes.py \
                     nrfconnect nrf52840dk_nrf52840+rpc lighting-app \
                     examples/lighting-app/nrfconnect/build/zephyr/zephyr.elf \

config/nrfconnect/chip-module/Kconfig.defaults

@@ -329,4 +329,25 @@ config FLASH_SHELL
     bool
     default n
 
+# SoC series related configuration
+
+if SOC_SERIES_NRF52X
+
+# Increase maximum data length of PDU supported in the Controller
+config BT_CTLR_DATA_LENGTH_MAX
+    int
+    default 251
+
+endif # SOC_SERIES_NRF52X
+
+if SOC_SERIES_NRF53X
+
+# Generate random numbers using Xoroshiro algorithm instead of direct calls
+# to the cryptocell library to workaround firmware hangs.
+choice RNG_GENERATOR_CHOICE
+    default XOROSHIRO_RANDOM_GENERATOR
+endchoice
+
+endif # SOC_SERIES_NRF53X
+
 endif

config/nrfconnect/chip-module/Kconfig.mcuboot.defaults

@@ -0,0 +1,145 @@
+#
+#   Copyright (c) 2022 Project CHIP Authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+
+# The purpose of this file is to define new default values of settings used when building mcuboot child image for Matter samples.
+
+config MAIN_STACK_SIZE
+    int
+    default 10240
+
+config BOOT_SWAP_SAVE_ENCTLV
+    bool
+    default n
+
+config BOOT_ENCRYPT_RSA
+    bool
+    default n
+
+config BOOT_ENCRYPT_EC256
+    bool
+    default n
+
+config BOOT_ENCRYPT_X25519
+    bool
+    default n
+
+choice BOOT_IMAGE_UPGRADE_MODE
+    default BOOT_UPGRADE_ONLY
+endchoice
+
+config BOOT_BOOTSTRAP
+    bool
+    default n
+
+config PM
+    bool
+    default n
+
+config FLASH
+    bool
+    default y
+
+config FPROTECT
+    bool
+    default y
+
+config NORDIC_QSPI_NOR
+    bool
+    default y
+
+config NORDIC_QSPI_NOR_FLASH_LAYOUT_PAGE_SIZE
+    int
+    default 4096
+
+config NORDIC_QSPI_NOR_STACK_WRITE_BUFFER_SIZE
+    int
+    default 16
+
+config BOOT_MAX_IMG_SECTORS
+    int
+    default 256
+
+config LOG
+    bool
+    default n
+
+config CONSOLE_HANDLER
+    bool
+    default n
+
+config BOOT_BANNER
+    bool
+    default n
+
+config TIMESLICING
+    bool
+    default n
+
+config RESET_ON_FATAL_ERROR
+    bool
+    default n
+
+config MULTITHREADING
+    bool
+    default n
+
+config TICKLESS_KERNEL
+    bool
+    default n
+
+config TIMEOUT_64BIT
+    bool
+    default n
+
+config NRF_ENABLE_ICACHE
+    bool
+    default n
+
+if SOC_SERIES_NRF53X
+
+# The following configurations are required to support simultaneous multi image update
+config PCD_APP
+    bool
+    default y
+
+config UPDATEABLE_IMAGE_NUMBER
+    int
+    default 2
+
+# The network core cannot access external flash directly. The flash simulator must be used to
+# provide a memory region that is used to forward the new firmware to the network core.
+config FLASH_SIMULATOR
+    bool
+    default y
+
+config FLASH_SIMULATOR_DOUBLE_WRITES
+    bool
+    default y
+
+config FLASH_SIMULATOR_STATS
+    bool
+    default n
+
+# Enable custom command to erase settings partition.
+config ENABLE_MGMT_PERUSER
+    bool
+    default y
+
+config BOOT_MGMT_CUSTOM_STORAGE_ERASE
+    bool
+    default y
+
+endif # SOC_SERIES_NRF53X

examples/light-switch-app/nrfconnect/configuration/nrf5340dk_nrf5340_cpuapp/child_image/multiprotocol_rpmsg.conf → config/nrfconnect/chip-module/Kconfig.mcuboot.root

@@ -14,9 +14,8 @@
 #   limitations under the License.
 #
 
-CONFIG_BT_PERIPHERAL=y
-CONFIG_BT_CENTRAL=n
-CONFIG_BT_MAX_CONN=1
-CONFIG_BT_BUF_ACL_RX_SIZE=502
-CONFIG_BT_BUF_ACL_TX_SIZE=251
-CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
+# The purpose of this file is to create a wrapper Kconfig file that will be set as
+# mcuboot_KCONFIG_ROOT and processed before any other Kconfig for mcuboot child image.
+
+rsource "Kconfig.mcuboot.defaults"
+source "${ZEPHYR_BASE}/../bootloader/mcuboot/boot/zephyr/Kconfig"

config/nrfconnect/chip-module/Kconfig.multiprotocol_rpmsg.defaults

@@ -0,0 +1,99 @@
+#
+#   Copyright (c) 2022 Project CHIP Authors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+
+# The purpose of this file is to define new default values of settings used when building multiprotocol_rpmsg child image for Matter samples.
+
+config LOG
+    bool
+    default n
+
+config HEAP_MEM_POOL_SIZE
+    int 
+    default 8192
+
+config MAIN_STACK_SIZE
+    int
+    default 2048
+
+config SYSTEM_WORKQUEUE_STACK_SIZE
+    int
+    default 2048
+
+config BT
+    bool
+    default y
+
+config BT_HCI_RAW
+    bool
+    default y
+
+config BT_MAX_CONN
+    int
+    default 1
+
+config BT_PERIPHERAL
+    bool
+    default y
+
+config BT_CENTRAL
+    bool
+    default n
+
+config BT_BUF_ACL_RX_SIZE
+    int
+    default 502
+
+config BT_BUF_ACL_TX_SIZE
+    int
+    default 251
+
+config BT_CTLR_DATA_LENGTH_MAX
+    int
+    default 251
+
+config BT_CTLR_ASSERT_HANDLER
+    bool
+    default y
+
+config BT_HCI_RAW_RESERVE
+    int
+    default 1
+
+# Workaround: Unable to allocate command buffer when using K_NO_WAIT since
+# Host number of completed commands does not follow normal flow control.
+config BT_BUF_CMD_TX_COUNT
+    int
+    default 10
+
+config ASSERT
+    bool
+    default y
+
+config DEBUG_INFO
+    bool
+    default y
+
+config EXCEPTION_STACK_TRACE
+    bool
+    default y
+
+config NRF_802154_SER_RADIO
+    bool
+    default y
+
+config NRF_RTC_TIMER_USER_CHAN_COUNT
+    int
+    default 2

examples/all-clusters-app/nrfconnect/configuration/nrf5340dk_nrf5340_cpuapp/child_image/multiprotocol_rpmsg_release.conf → config/nrfconnect/chip-module/Kconfig.multiprotocol_rpmsg.root

@@ -14,9 +14,8 @@
 #   limitations under the License.
 #
 
-CONFIG_BT_PERIPHERAL=y
-CONFIG_BT_CENTRAL=n
-CONFIG_BT_MAX_CONN=1
-CONFIG_BT_BUF_ACL_RX_SIZE=502
-CONFIG_BT_BUF_ACL_TX_SIZE=251
-CONFIG_BT_CTLR_DATA_LENGTH_MAX=251
+# The purpose of this file is to create a wrapper Kconfig file that will be set as
+# multiprotocol_rpmsg_KCONFIG_ROOT and processed before any other Kconfig for multiprotocol_rpmsg child image.
+
+rsource "Kconfig.multiprotocol_rpmsg.defaults"
+source "Kconfig.zephyr"

examples/all-clusters-app/nrfconnect/CMakeLists.txt

@@ -22,7 +22,9 @@ get_filename_component(ALL_CLUSTERS_COMMON_DIR ${CHIP_ROOT}/examples/all-cluster
 
 include(${CHIP_ROOT}/config/nrfconnect/app/check-nrfconnect-version.cmake)
 
-set(APPLICATION_CONFIG_DIR "configuration/\${BOARD}")
+# Set Kconfig root files that will be processed as a first Kconfig for used child images.
+set(mcuboot_KCONFIG_ROOT ${CHIP_ROOT}/config/nrfconnect/chip-module/Kconfig.mcuboot.root)
+set(multiprotocol_rpmsg_KCONFIG_ROOT ${CHIP_ROOT}/config/nrfconnect/chip-module/Kconfig.multiprotocol_rpmsg.root)
 
 if(DEFINED CONF_FILE AND NOT CONF_FILE STREQUAL "prj.conf")
     set(PM_STATIC_YML_FILE ${CMAKE_CURRENT_SOURCE_DIR}/configuration/${BOARD}/pm_static_dfu.yml)

examples/all-clusters-app/nrfconnect/README.md

@@ -294,11 +294,11 @@ To build for the low-power configuration, run the following command with
 _build-target_ replaced with the build target name of the Nordic Semiconductor's
 kit you own (for example `nrf52840dk_nrf52840`):
 
-    $ west build -b build-target -- -DOVERLAY_CONFIG=../../overlay-low_power.conf
+    $ west build -b build-target -- -DOVERLAY_CONFIG=overlay-low_power.conf
 
 For example, use the following command for `nrf52840dk_nrf52840`:
 
-    $ west build -b nrf52840dk_nrf52840 -- -DOVERLAY_CONFIG=../../overlay-low_power.conf
+    $ west build -b nrf52840dk_nrf52840 -- -DOVERLAY_CONFIG=overlay-low_power.conf
 
 ### Building with Device Firmware Upgrade support
 
@@ -323,11 +323,8 @@ Semiconductor kit you are using (for example `nrf52840dk_nrf52840`):
 
 #### Changing bootloader configuration
 
-To change the default MCUboot configuration, edit the `mcuboot.conf` or
-`mcuboot_release.conf` overlay files depending on whether you build the target
-with debug or release configuration. The files are located in the
-`configuration/build-target/child_image` directory (_build-target_ is your board
-name, for example `nrf52840dk_nrf52840`).
+To change the default MCUboot configuration, edit the `prj.conf` file located in
+the `child_image/mcuboot` directory.
 
 #### Changing flash memory settings
 

examples/all-clusters-app/nrfconnect/child_image/mcuboot/prj_dfu.conf

@@ -0,0 +1,30 @@
+#
+#    Copyright (c) 2022 Project CHIP Authors
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+# This target uses Kconfig.mcuboot.defaults to set options common for all
+# samples using mcuboot. This file should contain only options specific for this sample
+# mcuboot configuration or overrides of default values.
+
+CONFIG_MBEDTLS_CFG_FILE="mcuboot-mbedtls-cfg.h"
+
+# Bootloader size optimization
+# Disable not used modules that cannot be set in Kconfig.mcuboot.defaults due to overriding
+# in board files.
+CONFIG_GPIO=n
+CONFIG_CONSOLE=n
+CONFIG_SERIAL=n
+CONFIG_UART_CONSOLE=n
+CONFIG_USE_SEGGER_RTT=n