Allow easier customization of whole domain, entity lists, globs. (#5215)

homeassistant/helpers/config_validation.py

@@ -376,6 +376,8 @@ def ordered_dict(value_validator, key_validator=match_all):
         """Validate ordered dict."""
         config = OrderedDict()
 
+        if not isinstance(value, dict):
+            raise vol.Invalid('Value {} is not a dictionary'.format(value))
         for key, val in value.items():
             v_res = item_validator({key: val})
             config.update(v_res)
@@ -385,6 +387,13 @@ def ordered_dict(value_validator, key_validator=match_all):
     return validator
 
 
+def ensure_list_csv(value: Any) -> Sequence:
+    """Ensure that input is a list or make one from comma-separated string."""
+    if isinstance(value, str):
+        return [member.strip() for member in value.split(',')]
+    return ensure_list(value)
+
+
 # Validator helpers
 
 def key_dependency(key, dependency):