From 85c863a76605a0aa5781a4268722dc07fffd9f12 Mon Sep 17 00:00:00 2001
From: jan iversen <jancasacondor@gmail.com>
Date: Thu, 3 Mar 2022 08:46:58 +0100
Subject: [PATCH] Allow reload of modbus (#67390)

* Allow reload of modbus.

Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
---
 homeassistant/components/modbus/modbus.py     | 14 ++++++++++++++
 homeassistant/components/modbus/services.yaml |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/homeassistant/components/modbus/modbus.py b/homeassistant/components/modbus/modbus.py
index c980eab2b34..3fa4a74a932 100644
--- a/homeassistant/components/modbus/modbus.py
+++ b/homeassistant/components/modbus/modbus.py
@@ -35,6 +35,7 @@ import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.discovery import async_load_platform
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.event import async_call_later
+from homeassistant.helpers.reload import async_setup_reload_service
 from homeassistant.helpers.typing import ConfigType
 
 from .const import (
@@ -129,6 +130,11 @@ async def async_modbus_setup(
 ) -> bool:
     """Set up Modbus component."""
 
+    platform_names = []
+    for entry in PLATFORMS:
+        platform_names.append(entry[1])
+    await async_setup_reload_service(hass, DOMAIN, platform_names)
+
     hass.data[DOMAIN] = hub_collect = {}
     for conf_hub in config[DOMAIN]:
         my_hub = ModbusHub(hass, conf_hub)
@@ -239,6 +245,14 @@ async def async_modbus_setup(
     return True
 
 
+async def async_reset_platform(hass: HomeAssistant, integration_name: str) -> None:
+    """Release modbus resources."""
+    _LOGGER.info("Modbus reloading")
+    for hub in hass.data[DOMAIN]:
+        await hub.async_close()
+    del hass.data[DOMAIN]
+
+
 class ModbusHub:
     """Thread safe wrapper class for pymodbus."""
 
diff --git a/homeassistant/components/modbus/services.yaml b/homeassistant/components/modbus/services.yaml
index 373954e25df..07acf0a72df 100644
--- a/homeassistant/components/modbus/services.yaml
+++ b/homeassistant/components/modbus/services.yaml
@@ -1,3 +1,6 @@
+reload:
+  name: Reload
+  description: Reload all modbus entities.
 write_coil:
   name: Write coil
   description: Write to a modbus coil.