sysbuild: Add SDP FLPR image to automatic sysbuilds

Add SDP FLPR application image to the build depending
on the enabled configuration.

Signed-off-by: Jakub Zymelka <jakub.zymelka@nordicsemi.no>

cmake/sysbuild/sdp.cmake

@@ -0,0 +1,41 @@
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+# Update FLPR image KConfig based on main app configuration.
+#
+# Usage:
+#   flpr_egpio_update_kconfig()
+#
+function(flpr_egpio_update_kconfig)
+
+  sysbuild_get(CONFIG_MBOX_BACKEND IMAGE ${DEFAULT_IMAGE} VAR CONFIG_GPIO_NRFE_EGPIO_BACKEND_MBOX KCONFIG)
+  sysbuild_get(CONFIG_ICMSG_BACKEND IMAGE ${DEFAULT_IMAGE} VAR CONFIG_GPIO_NRFE_EGPIO_BACKEND_ICMSG KCONFIG)
+  sysbuild_get(CONFIG_PLATFORM IMAGE ${DEFAULT_IMAGE} VAR CONFIG_SOC KCONFIG)
+
+  message(STATUS "eGPIO: Using ${CONFIG_PLATFORM} SoC")
+
+  if(CONFIG_MBOX_BACKEND)
+    sysbuild_cache_set(VAR egpio_CONFIG_GPIO_NRFE_EGPIO_BACKEND_MBOX APPEND REMOVE_DUPLICATES "y")
+    if(CONFIG_PLATFORM STREQUAL "nrf54l15")
+      sysbuild_cache_set(VAR egpio_EXTRA_DTC_OVERLAY_FILE APPEND REMOVE_DUPLICATES "./boards/nrf54l15dk_nrf54l15_cpuflpr_mbox.overlay")
+    endif()
+    message(STATUS "eGPIO: Using MBOX backend")
+  elseif(CONFIG_ICMSG_BACKEND)
+    sysbuild_cache_set(VAR egpio_CONFIG_GPIO_NRFE_EGPIO_BACKEND_ICMSG APPEND REMOVE_DUPLICATES "y")
+    if(CONFIG_PLATFORM STREQUAL "nrf54l15")
+      sysbuild_cache_set(VAR egpio_EXTRA_DTC_OVERLAY_FILE APPEND REMOVE_DUPLICATES "./boards/nrf54l15dk_nrf54l15_cpuflpr_icmsg.overlay")
+    endif()
+    sysbuild_cache_set(VAR egpio_CONFIG_IPC_SERVICE APPEND REMOVE_DUPLICATES "y")
+    sysbuild_cache_set(VAR egpio_CONFIG_IPC_SERVICE_BACKEND_ICMSG APPEND REMOVE_DUPLICATES "y")
+    message(STATUS "eGPIO: Using ICMSG backend")
+  endif()
+
+  sysbuild_cache(CREATE APPLICATION egpio CMAKE_RERUN)
+
+endfunction()
+
+# If eGPIO FLPR application is enabled, update Kconfigs
+if(SB_CONFIG_EGPIO_FLPR_APPLICATION)
+  flpr_egpio_update_kconfig()
+endif()

sysbuild/CMakeLists.txt

@@ -64,6 +64,10 @@ function(include_packaging)
   include(${ZEPHYR_NRF_MODULE_DIR}/subsys/bootloader/cmake/packaging.cmake)
 endfunction()
 
+function(include_sdp)
+  include(${ZEPHYR_NRF_MODULE_DIR}/cmake/sysbuild/sdp.cmake)
+endfunction()
+
 function(${SYSBUILD_CURRENT_MODULE_NAME}_pre_cmake)
   cmake_parse_arguments(PRE_CMAKE "" "" "IMAGES" ${ARGN})
   restore_ncs_vars()
@@ -594,6 +598,10 @@ function(${SYSBUILD_CURRENT_MODULE_NAME}_post_cmake)
       set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${BINARY_DIR}/zephyr/.config)
     endif()
   endif()
+
+  if(SB_CONFIG_SDP)
+    include_sdp()
+  endif()
 endfunction(${SYSBUILD_CURRENT_MODULE_NAME}_post_cmake)
 
 # Enable use of partition manager with sysbuild.
@@ -608,5 +616,6 @@ include(${CMAKE_CURRENT_LIST_DIR}/netcore.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/secureboot.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/mcuboot.cmake)
 include(${CMAKE_CURRENT_LIST_DIR}/suit.cmake)
+include(${CMAKE_CURRENT_LIST_DIR}/sdp.cmake)
 
 store_ncs_vars()

sysbuild/Kconfig.sdp

@@ -0,0 +1,21 @@
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+menu "SW defined peripherals"
+
+menuconfig SDP
+	bool "Software defined peripherals"
+
+if SDP
+
+config EGPIO_FLPR_APPLICATION
+	bool "Nordic eGPIO FLPR application"
+	help
+	  Include FLPR side eGPIO application in build.
+	  FLPR eGPIO application is an eGPIO driver built for an FLPR core that receives commands
+	  from the app core and controls the pin states based on them.
+
+endif # SDP
+
+endmenu

sysbuild/Kconfig.sysbuild

@@ -79,3 +79,4 @@ rsource "Kconfig.zip"
 rsource "Kconfig.matter"
 rsource "Kconfig.wifi"
 rsource "Kconfig.suit"
+rsource "Kconfig.sdp"

sysbuild/sdp.cmake

@@ -0,0 +1,22 @@
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+# If it is enabled, include the eGPIO FLPR application in the build
+if(SB_CONFIG_EGPIO_FLPR_APPLICATION)
+  # Extract soc name from related variables
+  string(REPLACE "/" ";" split_board_qualifiers "${BOARD_QUALIFIERS}") # Replace all "/" with ";"
+  list(GET split_board_qualifiers 1 target_soc) # Get the second element of the list, which is the soc name
+  if((DEFINED ${BOARD_REVISION}) AND NOT ${BOARD_REVISION} STREQUAL "")
+    string(CONCAT board_target_flpr ${BOARD} "@" ${BOARD_REVISION} "/" ${target_soc} "/cpuflpr")
+  else()
+    string(CONCAT board_target_flpr ${BOARD} "/" ${target_soc} "/cpuflpr")
+  endif()
+  set(target_soc) # Clear the variable that is no longer needed
+
+  ExternalZephyrProject_Add(
+    APPLICATION egpio # Add ExternalZephyrProject for the sdp_gpio application
+    SOURCE_DIR ${ZEPHYR_NRF_MODULE_DIR}/applications/sdp/gpio # Specify the path to the application directory
+    BOARD ${board_target_flpr} # Specify the board for the application
+  )
+endif()