zephyr: Allow external Kconfig root

Allows for modules to override the NCS Kconfig root

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

modules/modules.cmake

@@ -10,6 +10,7 @@ set(ZEPHYR_AZURE_SDK_FOR_C_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR}/azure-sdk-for-c)
 set(ZEPHYR_OPENTHREAD_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR}/openthread)
 set(ZEPHYR_OPENTHREAD_KCONFIG ${CMAKE_CURRENT_LIST_DIR}/openthread/Kconfig)
 set(ZEPHYR_HAL_NORDIC_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR}/hal_nordic)
+set(ZEPHYR_NRF_KCONFIG ${CMAKE_CURRENT_LIST_DIR}/../Kconfig.nrf)
 
 # Those are modules with Kconfig tree's inside the module repo but where
 # nRF Connect SDK extend those trees.

zephyr/module.yml

@@ -1,6 +1,7 @@
 build:
   cmake: .
   kconfig: Kconfig.nrf
+  kconfig-ext: true
   sysbuild-cmake: sysbuild
   sysbuild-kconfig: sysbuild/Kconfig.sysbuild
   settings: