Add ethernet_info docs (#2300)

components/text_sensor/ethernet_info.rst

@@ -0,0 +1,30 @@
+Ethernet Info Text Sensor
+=========================
+
+.. seo::
+    :description: Instructions for setting up Ethernet info text sensors.
+    :image: ethernet.svg
+
+The ``ethernet_info`` text sensor platform exposes different Ethernet information
+via text sensors.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    text_sensor:
+      - platform: ethernet_info
+        ip_address:
+          name: ESP IP Address
+
+
+Configuration variables:
+------------------------
+
+- **ip_address** (*Optional*): Expose the IP Address of the ESP as a text sensor. All options from
+  :ref:`Text Sensor <config-text_sensor>`.
+
+See Also
+--------
+
+- :apiref:`ethernet_info/ethernet_info_text_sensor.h`
+- :ghedit:`Edit`

index.rst

@@ -594,6 +594,7 @@ Text Sensor Components
     MQTT Subscribe Text, components/text_sensor/mqtt_subscribe, mqtt.png
     Version, components/text_sensor/version, new-box.svg
     WiFi Info, components/text_sensor/wifi_info, network-wifi.svg
+    Ethernet Info, components/text_sensor/ethernet_info, ethernet.svg
     BLE Scanner, components/text_sensor/ble_scanner, bluetooth.svg
     Modbus Text Sensor, components/text_sensor/modbus_controller, modbus.png
     Template Text Sensor, components/text_sensor/template, description.svg