fix path stuff and kconfig references

firmware/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+#
+# This CMake file is picked by the Zephyr build system because it is defined
+# as the module CMake entry point (see zephyr/module.yml).
+
+
+# This is needed so that custom driver classes using system calls are taken into
+# account
+zephyr_syscall_include_directories(include)
+
+zephyr_include_directories(include)
+
+add_subdirectory(drivers)
+add_subdirectory(lib)

firmware/Kconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+#
+# This Kconfig file is picked by the Zephyr build system because it is defined
+# as the module Kconfig entry point (see zephyr/module.yml). You can browse
+# module options by going to Zephyr -> Modules in Kconfig.
+
+rsource "drivers/Kconfig"
+rsource "lib/Kconfig"

firmware/zephyr/module.yml

@@ -0,0 +1,17 @@
+build:
+  # Path to the Kconfig file that will be sourced into Zephyr Kconfig tree under
+  # Zephyr > Modules > example-application. Path is relative from root of this
+  # repository.
+  kconfig: Kconfig
+  # Path to the folder that contains the CMakeLists.txt file to be included by
+  # Zephyr build system. The `.` is the root of this repository.
+  cmake: .
+  settings:
+    # Additional roots for boards and DTS files. Zephyr will use the
+    # `<board_root>/boards` for additional boards. The `.` is the root of this
+    # repository.
+    board_root: .
+    # Zephyr will use the `<dts_root>/dts` for additional dts files and
+    # `<dts_root>/dts/bindings` for additional dts binding files. The `.` is
+    # the root of this repository.
+    dts_root: .