Add host time platform; remove host support from sntp. (#6854)

esphome/components/sntp/time.py

@@ -2,24 +2,41 @@ from esphome.components import time as time_
 import esphome.config_validation as cv
 import esphome.codegen as cg
 from esphome.core import CORE
-from esphome.const import CONF_ID, CONF_SERVERS
-
+from esphome.const import (
+    CONF_ID,
+    CONF_SERVERS,
+    PLATFORM_ESP32,
+    PLATFORM_ESP8266,
+    PLATFORM_RP2040,
+    PLATFORM_RTL87XX,
+    PLATFORM_BK72XX,
+)
 
 DEPENDENCIES = ["network"]
 sntp_ns = cg.esphome_ns.namespace("sntp")
 SNTPComponent = sntp_ns.class_("SNTPComponent", time_.RealTimeClock)
 
-
 DEFAULT_SERVERS = ["0.pool.ntp.org", "1.pool.ntp.org", "2.pool.ntp.org"]
 
-CONFIG_SCHEMA = time_.TIME_SCHEMA.extend(
-    {
-        cv.GenerateID(): cv.declare_id(SNTPComponent),
-        cv.Optional(CONF_SERVERS, default=DEFAULT_SERVERS): cv.All(
-            cv.ensure_list(cv.Any(cv.domain, cv.hostname)), cv.Length(min=1, max=3)
-        ),
-    }
-).extend(cv.COMPONENT_SCHEMA)
+CONFIG_SCHEMA = cv.All(
+    time_.TIME_SCHEMA.extend(
+        {
+            cv.GenerateID(): cv.declare_id(SNTPComponent),
+            cv.Optional(CONF_SERVERS, default=DEFAULT_SERVERS): cv.All(
+                cv.ensure_list(cv.Any(cv.domain, cv.hostname)), cv.Length(min=1, max=3)
+            ),
+        }
+    ).extend(cv.COMPONENT_SCHEMA),
+    cv.only_on(
+        [
+            PLATFORM_ESP32,
+            PLATFORM_ESP8266,
+            PLATFORM_RP2040,
+            PLATFORM_BK72XX,
+            PLATFORM_RTL87XX,
+        ]
+    ),
+)
 
 
 async def to_code(config):