Separate i2c and spi board bus configuration into and own library for protected build target

This info is needed on both kernel and user sides, and is just data.

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

boards/px4/fmu-v5/src/CMakeLists.txt

@@ -31,14 +31,18 @@
 #
 ############################################################################
 
+add_library(board_bus_info
+	i2c.cpp
+	spi.cpp
+)
+add_dependencies(board_bus_info nuttx_context)
+
 add_library(drivers_board
 	can.c
-	i2c.cpp
 	init.c
 	led.c
 	manifest.c
 	sdio.c
-	spi.cpp
 	timer_config.cpp
 	usb.c
 	toc.c
@@ -57,7 +61,7 @@ target_link_libraries(drivers_board
 if (NOT DEFINED CONFIG_BUILD_FLAT)
 	target_link_libraries(drivers_board PRIVATE px4_kernel_layer)
 else()
-	target_link_libraries(drivers_board PRIVATE px4_layer)
+	target_link_libraries(drivers_board PRIVATE px4_layer board_bus_info)
 endif()
 
 add_library(drivers_userspace

platforms/nuttx/src/px4/common/px4_protected_layers.cmake

@@ -29,6 +29,11 @@ add_library(px4_board_ctrl
 
 add_dependencies(px4_board_ctrl nuttx_context px4_kernel_builtin_list_target)
 
+target_link_libraries(px4_layer
+	PUBLIC
+		board_bus_info
+)
+
 # Build the kernel side px4_kernel_layer
 
 add_library(px4_kernel_layer
@@ -43,6 +48,11 @@ target_link_libraries(px4_kernel_layer
 		nuttx_kmm
 )
 
+target_link_libraries(px4_kernel_layer
+	PUBLIC
+		board_bus_info
+)
+
 if (DEFINED PX4_CRYPTO)
 	target_link_libraries(px4_kernel_layer PUBLIC crypto_backend)
 endif()