Use skip_configuration flag to skip requests in ZHA (home-assistant#4…

…1554)

* Remove duplicated attribute request from ZHA

The on_off attribute is on the REPORT_CONFIG, so
super().async_initialize already requests it from the device.
No need to request it twice.

* Use skip_configuration flag to skip requests in ZHA

* Fix loading from cache

* Fix loading from cache condition

homeassistant/components/zha/core/channels/base.py

@@ -200,6 +200,10 @@ async def async_configure(self):
 
     async def async_initialize(self, from_cache):
         """Initialize channel."""
+        if not from_cache and self._ch_pool.skip_configuration:
+            self._status = ChannelStatus.INITIALIZED
+            return
+
         self.debug("initializing channel: from_cache: %s", from_cache)
         attributes = []
         for report_config in self._report_config:

homeassistant/components/zha/core/channels/general.py

@@ -89,11 +89,12 @@ async def async_configure(self):
 
     async def async_initialize(self, from_cache):
         """Initialize channel."""
-        power_source = await self.get_attribute_value(
-            "power_source", from_cache=from_cache
-        )
-        if power_source is not None:
-            self._power_source = power_source
+        if not self._ch_pool.skip_configuration or from_cache:
+            power_source = await self.get_attribute_value(
+                "power_source", from_cache=from_cache
+            )
+            if power_source is not None:
+                self._power_source = power_source
         await super().async_initialize(from_cache)
 
     def get_power_source(self):

homeassistant/components/zha/core/device.py

@@ -401,7 +401,7 @@ async def async_configure(self):
         entry = self.gateway.zha_storage.async_create_or_update_device(self)
         self.debug("stored in registry: %s", entry)
 
-        if self._channels.identify_ch is not None:
+        if self._channels.identify_ch is not None and not self.skip_configuration:
             await self._channels.identify_ch.trigger_effect(
                 EFFECT_OKAY, EFFECT_DEFAULT_VARIANT
             )