Revert "edtlib: fix "last modified" semantic for included ... specs"

[1] was introduced to get more valuable answers from
the PropertySpec.path API, which is supposed to tell
in which file the property's specification was "last modfied".

Further work on related issues [2] showed that the
approach chosen in [1] is dead end: we need to first rethink
how bindings (and especially child-bindings) are initialized.

[1] edtlib: fix last modified semantic in included property specs
[2] edtlib: Preserve paths of properties from included child bindings

See also: zephyrproject-rtos#65221, zephyrproject-rtos#78095

This reverts commit b3b5ad8.

Signed-off-by: Christophe Dufaza <[email protected]>

Author: dottspina

scripts/dts/python-devicetree/src/devicetree/edtlib.py

@@ -163,9 +163,7 @@ class Binding:
 
     def __init__(self, path: Optional[str], fname2path: Dict[str, str],
                  raw: Any = None, require_compatible: bool = True,
-                 require_description: bool = True,
-                 inc_allowlist: Optional[List[str]] = None,
-                 inc_blocklist: Optional[List[str]] = None):
+                 require_description: bool = True):
         """
         Binding constructor.
 
@@ -193,36 +191,16 @@ def __init__(self, path: Optional[str], fname2path: Dict[str, str],
           "description:" line. If False, a missing "description:" is
           not an error. Either way, "description:" must be a string
           if it is present in the binding.
-
-        inc_allowlist:
-          The property-allowlist filter set by including bindings.
-
-        inc_blocklist:
-          The property-blocklist filter set by including bindings.
         """
         self.path: Optional[str] = path
         self._fname2path: Dict[str, str] = fname2path
 
-        self._inc_allowlist: Optional[List[str]] = inc_allowlist
-        self._inc_blocklist: Optional[List[str]] = inc_blocklist
-
         if raw is None:
             if path is None:
                 _err("you must provide either a 'path' or a 'raw' argument")
             with open(path, encoding="utf-8") as f:
                 raw = yaml.load(f, Loader=_BindingLoader)
 
-        # Get the properties this binding modifies
-        # before we merge the included ones.
-        last_modified_props = list(raw.get("properties", {}).keys())
-
-        # Map property names to their specifications:
-        # - first, _merge_includes() will recursively populate prop2specs with
-        #   the properties specified by the included bindings
-        # - eventually, we'll update prop2specs with the properties
-        #   this binding itself defines or modifies
-        self.prop2specs: Dict[str, 'PropertySpec'] = {}
-
         # Merge any included files into self.raw. This also pulls in
         # inherited child binding definitions, so it has to be done
         # before initializing those.
@@ -246,11 +224,10 @@ def __init__(self, path: Optional[str], fname2path: Dict[str, str],
         # Make sure this is a well defined object.
         self._check(require_compatible, require_description)
 
-        # Update specs with the properties this binding defines or modifies.
-        for prop_name in last_modified_props:
-            self.prop2specs[prop_name] = PropertySpec(prop_name, self)
-
         # Initialize look up tables.
+        self.prop2specs: Dict[str, 'PropertySpec'] = {}
+        for prop_name in self.raw.get("properties", {}).keys():
+            self.prop2specs[prop_name] = PropertySpec(prop_name, self)
         self.specifier2cells: Dict[str, List[str]] = {}
         for key, val in self.raw.items():
             if key.endswith("-cells"):
@@ -314,41 +291,18 @@ def _merge_includes(self, raw: dict, binding_path: Optional[str]) -> dict:
 
         if isinstance(include, str):
             # Simple scalar string case
-            # Load YAML file and register property specs into prop2specs.
-            inc_raw = self._load_raw(include, self._inc_allowlist,
-                                     self._inc_blocklist)
-
-            _merge_props(merged, inc_raw, None, binding_path,  False)
+            _merge_props(merged, self._load_raw(include), None, binding_path,
+                         False)
         elif isinstance(include, list):
             # List of strings and maps. These types may be intermixed.
             for elem in include:
                 if isinstance(elem, str):
-                    # Load YAML file and register property specs into prop2specs.
-                    inc_raw = self._load_raw(elem, self._inc_allowlist,
-                                             self._inc_blocklist)
-
-                    _merge_props(merged, inc_raw, None, binding_path, False)
+                    _merge_props(merged, self._load_raw(elem), None,
+                                 binding_path, False)
                 elif isinstance(elem, dict):
                     name = elem.pop('name', None)
-
-                    # Merge this include property-allowlist filter
-                    # with filters from including bindings.
                     allowlist = elem.pop('property-allowlist', None)
-                    if allowlist is not None:
-                        if self._inc_allowlist:
-                            allowlist.extend(self._inc_allowlist)
-                    else:
-                        allowlist = self._inc_allowlist
-
-                    # Merge this include property-blocklist filter
-                    # with filters from including bindings.
                     blocklist = elem.pop('property-blocklist', None)
-                    if blocklist is not None:
-                        if self._inc_blocklist:
-                            blocklist.extend(self._inc_blocklist)
-                    else:
-                        blocklist = self._inc_blocklist
-
                     child_filter = elem.pop('child-binding', None)
 
                     if elem:
@@ -359,12 +313,10 @@ def _merge_includes(self, raw: dict, binding_path: Optional[str]) -> dict:
                     _check_include_dict(name, allowlist, blocklist,
                                         child_filter, binding_path)
 
-                    # Load YAML file, and register (filtered) property specs
-                    # into prop2specs.
-                    contents = self._load_raw(name,
-                                              allowlist, blocklist,
-                                              child_filter)
+                    contents = self._load_raw(name)
 
+                    _filter_properties(contents, allowlist, blocklist,
+                                       child_filter, binding_path)
                     _merge_props(merged, contents, None, binding_path, False)
                 else:
                     _err(f"all elements in 'include:' in {binding_path} "
@@ -384,17 +336,11 @@ def _merge_includes(self, raw: dict, binding_path: Optional[str]) -> dict:
 
         return raw
 
-
-    def _load_raw(self, fname: str,
-                  allowlist: Optional[List[str]] = None,
-                  blocklist: Optional[List[str]] = None,
-                  child_filter: Optional[dict] = None) -> dict:
+    def _load_raw(self, fname: str) -> dict:
         # Returns the contents of the binding given by 'fname' after merging
-        # any bindings it lists in 'include:' into it, according to the given
-        # property filters.
-        #
-        # Will also register the (filtered) included property specs
-        # into prop2specs.
+        # any bindings it lists in 'include:' into it. 'fname' is just the
+        # basename of the file, so we check that there aren't multiple
+        # candidates.
 
         path = self._fname2path.get(fname)
 
@@ -406,55 +352,8 @@ def _load_raw(self, fname: str,
             if not isinstance(contents, dict):
                 _err(f'{path}: invalid contents, expected a mapping')
 
-        # Apply constraints to included YAML contents.
-        _filter_properties(contents,
-                           allowlist, blocklist,
-                           child_filter, self.path)
-
-        # Register included property specs.
-        self._add_included_prop2specs(fname, contents, allowlist, blocklist)
-
         return self._merge_includes(contents, path)
 
-    def _add_included_prop2specs(self, fname: str, contents: dict,
-                                 allowlist: Optional[List[str]] = None,
-                                 blocklist: Optional[List[str]] = None) -> None:
-        # Registers the properties specified by an included binding file
-        # into the properties this binding supports/requires (aka prop2specs).
-        #
-        # Consider "this" binding B includes I1 which itself includes I2.
-        #
-        # We assume to be called in that order:
-        # 1) _add_included_prop2spec(B, I1)
-        # 2) _add_included_prop2spec(B, I2)
-        #
-        # Where we don't want I2 "taking ownership" for properties
-        # modified by I1.
-        #
-        # So we:
-        # - first create a binding that represents the included file
-        # - then add the property specs defined by this binding to prop2specs,
-        #   without overriding the specs modified by an including binding
-        #
-        # Note: Unfortunately, we can't cache these base bindings,
-        # as a same YAML file may be included with different filters
-        # (property-allowlist and such), leading to different contents.
-
-        inc_binding = Binding(
-            self._fname2path[fname],
-            self._fname2path,
-            contents,
-            require_compatible=False,
-            require_description=False,
-            # Recursively pass filters to included bindings.
-            inc_allowlist=allowlist,
-            inc_blocklist=blocklist,
-        )
-
-        for prop, spec in inc_binding.prop2specs.items():
-            if prop not in self.prop2specs:
-                self.prop2specs[prop] = spec
-
     def _check(self, require_compatible: bool, require_description: bool):
         # Does sanity checking on the binding.