Add config flow to EDL21 (#87655)

* Added config_flow for edl21.

* Added already_configured check.

* Added config_flow test

* Added setup of the edl21 from configuration.yaml

* Ran script.gen_requirements_all

* Removed the generated translation file.

* Added a deprecation warning when importing from configuration.yaml.

* Readded the platform schema.

* Added handling of optional name for legacy configuration.

* Fixed handling of default value in legacy configuration.

* Added duplication check entries created via legacy config.

* Apply suggestions from code review

Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review

Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>

* Apply suggestions from code review

---------

Co-authored-by: epenet <6771947+epenet@users.noreply.github.com>

homeassistant/components/edl21/sensor.py

@@ -1,8 +1,9 @@
 """Support for EDL21 Smart Meters."""
 from __future__ import annotations
 
+from collections.abc import Mapping
 from datetime import timedelta
-import logging
+from typing import Any
 
 from sml import SmlGetListResponse
 from sml.asyncio import SmlProtocol
@@ -15,6 +16,7 @@ from homeassistant.components.sensor import (
     SensorEntityDescription,
     SensorStateClass,
 )
+from homeassistant.config_entries import SOURCE_IMPORT, ConfigEntry
 from homeassistant.const import (
     CONF_NAME,
     DEGREE,
@@ -31,15 +33,13 @@ from homeassistant.helpers.dispatcher import (
     async_dispatcher_send,
 )
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.issue_registry import IssueSeverity, async_create_issue
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util.dt import utcnow
 
-_LOGGER = logging.getLogger(__name__)
+from .const import CONF_SERIAL_PORT, DOMAIN, LOGGER, SIGNAL_EDL21_TELEGRAM
 
-DOMAIN = "edl21"
-CONF_SERIAL_PORT = "serial_port"
 MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=60)
-SIGNAL_EDL21_TELEGRAM = "edl21_telegram"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -269,9 +269,33 @@ async def async_setup_platform(
     config: ConfigType,
     async_add_entities: AddEntitiesCallback,
     discovery_info: DiscoveryInfoType | None = None,
+) -> None:
+    """Set up EDL21 sensors via configuration.yaml and show deprecation warning."""
+    async_create_issue(
+        hass,
+        DOMAIN,
+        "deprecated_yaml",
+        breaks_in_ha_version="2023.2.0",
+        is_fixable=False,
+        severity=IssueSeverity.WARNING,
+        translation_key="deprecated_yaml",
+    )
+    hass.async_create_task(
+        hass.config_entries.flow.async_init(
+            DOMAIN,
+            context={"source": SOURCE_IMPORT},
+            data=config,
+        )
+    )
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up the EDL21 sensor."""
-    hass.data[DOMAIN] = EDL21(hass, config, async_add_entities)
+    hass.data[DOMAIN] = EDL21(hass, config_entry.data, async_add_entities)
     await hass.data[DOMAIN].connect()
 
 
@@ -295,14 +319,14 @@ class EDL21:
     def __init__(
         self,
         hass: HomeAssistant,
-        config: ConfigType,
+        config: Mapping[str, Any],
         async_add_entities: AddEntitiesCallback,
     ) -> None:
         """Initialize an EDL21 object."""
         self._registered_obis: set[tuple[str, str]] = set()
         self._hass = hass
         self._async_add_entities = async_add_entities
-        self._name = config[CONF_NAME]
+        self._name = config.get(CONF_NAME)
         self._proto = SmlProtocol(config[CONF_SERIAL_PORT])
         self._proto.add_listener(self.event, ["SmlGetListResponse"])
 
@@ -347,7 +371,7 @@ class EDL21:
                     )
                     self._registered_obis.add((electricity_id, obis))
                 elif obis not in self._OBIS_BLACKLIST:
-                    _LOGGER.warning(
+                    LOGGER.warning(
                         "Unhandled sensor %s detected. Please report at %s",
                         obis,
                         "https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue+label%3A%22integration%3A+edl21%22",
@@ -366,7 +390,7 @@ class EDL21:
                 "sensor", DOMAIN, entity.old_unique_id
             )
             if old_entity_id is not None:
-                _LOGGER.debug(
+                LOGGER.debug(
                     "Migrating unique_id from [%s] to [%s]",
                     entity.old_unique_id,
                     entity.unique_id,