mcp3008: Tidy up and fix auto load bug (#5842)

esphome/components/mcp3008/sensor/__init__.py

@@ -0,0 +1,53 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import sensor, voltage_sampler
+from esphome.const import (
+    CONF_ID,
+    CONF_NUMBER,
+    UNIT_VOLT,
+    STATE_CLASS_MEASUREMENT,
+    DEVICE_CLASS_VOLTAGE,
+)
+
+from .. import mcp3008_ns, MCP3008
+
+AUTO_LOAD = ["voltage_sampler"]
+
+DEPENDENCIES = ["mcp3008"]
+
+MCP3008Sensor = mcp3008_ns.class_(
+    "MCP3008Sensor",
+    sensor.Sensor,
+    cg.PollingComponent,
+    voltage_sampler.VoltageSampler,
+    cg.Parented.template(MCP3008),
+)
+CONF_REFERENCE_VOLTAGE = "reference_voltage"
+CONF_MCP3008_ID = "mcp3008_id"
+
+CONFIG_SCHEMA = (
+    sensor.sensor_schema(
+        MCP3008Sensor,
+        unit_of_measurement=UNIT_VOLT,
+        state_class=STATE_CLASS_MEASUREMENT,
+        device_class=DEVICE_CLASS_VOLTAGE,
+    )
+    .extend(
+        {
+            cv.GenerateID(CONF_MCP3008_ID): cv.use_id(MCP3008),
+            cv.Required(CONF_NUMBER): cv.int_,
+            cv.Optional(CONF_REFERENCE_VOLTAGE, default="3.3V"): cv.voltage,
+        }
+    )
+    .extend(cv.polling_component_schema("60s"))
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_parented(var, config[CONF_MCP3008_ID])
+    await cg.register_component(var, config)
+    await sensor.register_sensor(var, config)
+
+    cg.add(var.set_pin(config[CONF_NUMBER]))
+    cg.add(var.set_reference_voltage(config[CONF_REFERENCE_VOLTAGE]))