diff --git a/homeassistant/components/smarla/entity.py b/homeassistant/components/smarla/entity.py
index a0ca052219c..ba213adc9ab 100644
--- a/homeassistant/components/smarla/entity.py
+++ b/homeassistant/components/smarla/entity.py
@@ -1,25 +1,37 @@
 """Common base for entities."""
 
+from dataclasses import dataclass
 from typing import Any
 
 from pysmarlaapi import Federwiege
-from pysmarlaapi.federwiege.classes import Property
 
 from homeassistant.helpers.device_registry import DeviceInfo
-from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.entity import Entity, EntityDescription
 
 from .const import DEVICE_MODEL_NAME, DOMAIN, MANUFACTURER_NAME
 
 
+@dataclass(frozen=True, kw_only=True)
+class SmarlaEntityDescription(EntityDescription):
+    """Class describing Swing2Sleep Smarla entities."""
+
+    service: str
+    property: str
+
+
 class SmarlaBaseEntity(Entity):
     """Common Base Entity class for defining Smarla device."""
 
+    entity_description: SmarlaEntityDescription
+
     _attr_should_poll = False
     _attr_has_entity_name = True
 
-    def __init__(self, federwiege: Federwiege, prop: Property) -> None:
+    def __init__(self, federwiege: Federwiege, desc: SmarlaEntityDescription) -> None:
         """Initialise the entity."""
-        self._property = prop
+        self.entity_description = desc
+        self._property = federwiege.get_property(desc.service, desc.property)
+        self._attr_unique_id = f"{federwiege.serial_number}-{desc.key}"
         self._attr_device_info = DeviceInfo(
             identifiers={(DOMAIN, federwiege.serial_number)},
             name=DEVICE_MODEL_NAME,
diff --git a/homeassistant/components/smarla/switch.py b/homeassistant/components/smarla/switch.py
index 49bcce23b24..d68f3428a77 100644
--- a/homeassistant/components/smarla/switch.py
+++ b/homeassistant/components/smarla/switch.py
@@ -3,7 +3,6 @@
 from dataclasses import dataclass
 from typing import Any
 
-from pysmarlaapi import Federwiege
 from pysmarlaapi.federwiege.classes import Property
 
 from homeassistant.components.switch import SwitchEntity, SwitchEntityDescription
@@ -11,16 +10,13 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 
 from . import FederwiegeConfigEntry
-from .entity import SmarlaBaseEntity
+from .entity import SmarlaBaseEntity, SmarlaEntityDescription
 
 
 @dataclass(frozen=True, kw_only=True)
-class SmarlaSwitchEntityDescription(SwitchEntityDescription):
+class SmarlaSwitchEntityDescription(SmarlaEntityDescription, SwitchEntityDescription):
     """Class describing Swing2Sleep Smarla switch entity."""
 
-    service: str
-    property: str
-
 
 SWITCHES: list[SmarlaSwitchEntityDescription] = [
     SmarlaSwitchEntityDescription(
@@ -55,17 +51,6 @@ class SmarlaSwitch(SmarlaBaseEntity, SwitchEntity):
 
     _property: Property[bool]
 
-    def __init__(
-        self,
-        federwiege: Federwiege,
-        desc: SmarlaSwitchEntityDescription,
-    ) -> None:
-        """Initialize a Smarla switch."""
-        prop = federwiege.get_property(desc.service, desc.property)
-        super().__init__(federwiege, prop)
-        self.entity_description = desc
-        self._attr_unique_id = f"{federwiege.serial_number}-{desc.key}"
-
     @property
     def is_on(self) -> bool:
         """Return the entity value to represent the entity state."""