refactor(soc): create soc include folders

components/soc/CMakeLists.txt

@@ -14,9 +14,15 @@ endif()
 set(includes "include" "${target_folder}")
 
 if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${target_folder}/include")
+    # miscellaneous headers, like definitions, man-made register headers, wrappers, etc.
     list(APPEND includes "${target_folder}/include")
 endif()
 
+if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${target_folder}/register")
+    # register headers that generated by script from CSV
+    list(APPEND includes "${target_folder}/register")
+endif()
+
 if(target STREQUAL "esp32")
     list(APPEND srcs "${target_folder}/dport_access.c")
 endif()

components/soc/README.md

@@ -7,4 +7,8 @@ The `soc` component provides hardware description for targets supported by ESP-I
     - `xxx_channel.h` - definitions for hardware with multiple channels
     - `xxx_caps.h`  - features/capabilities of the hardware
     - `xxx_pins.h`  - pin definitions
-    - `xxx_periph.h/*.c`  - includes all headers related to a peripheral; declaration and definition of IO mapping for that hardware
+    - `xxx_periph.h/*.c`  - includes all headers related to a peripheral; declaration and definition of IO mapping for that hardware
+
+Specially, the `xxx_reg.h` and `xxx_struct.h` headers that generated by script are under `register/soc` folder. Please DO NOT **add** other manual coded files under this folder.
+
+For other soc headers that are used as wrapper, definition, signaling, mapping or manual coded registers, please add them under `include/soc` folder.