Use callback instead of async

homeassistant/components/updater/__init__.py

@@ -50,9 +50,10 @@ RESPONSE_SCHEMA = vol.Schema(
 
 
 class Updater:
-    """Updater class."""
+    """Updater class for data exchange."""
 
     def __init__(self, update_available: bool, newest_version: str, release_notes: str):
+        """Updater constructor."""
         self.update_available = update_available
         self.release_notes = release_notes
         self.newest_version = newest_version

homeassistant/components/updater/binary_sensor.py

@@ -1,5 +1,6 @@
 """Support for Home Assistant Updater binary sensors."""
 
+from homeassistant.core import callback
 from homeassistant.components.binary_sensor import BinarySensorDevice
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 
@@ -58,7 +59,8 @@ class UpdaterBinary(BinarySensorDevice):
             data[ATTR_NEWEST_VERSION] = self._newest_version
         return data
 
-    async def async_added_to_hass(self):
+    @callback
+    def async_added_to_hass(self):
         """Register update dispatcher."""
 
         async def async_state_update(updater: Updater):