Add cd74hc4067 multiplexer (#2431)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
Co-authored-by: asoehlke <git@soehlke.de>

esphome/components/cd74hc4067/__init__.py

@@ -0,0 +1,53 @@
+import esphome.codegen as cg
+from esphome import pins
+import esphome.config_validation as cv
+from esphome.const import (
+    CONF_DELAY,
+    CONF_ID,
+)
+
+CODEOWNERS = ["@asoehlke"]
+AUTO_LOAD = ["sensor", "voltage_sampler"]
+
+cd74hc4067_ns = cg.esphome_ns.namespace("cd74hc4067")
+
+CD74HC4067Component = cd74hc4067_ns.class_(
+    "CD74HC4067Component", cg.Component, cg.PollingComponent
+)
+
+CONF_PIN_S0 = "pin_s0"
+CONF_PIN_S1 = "pin_s1"
+CONF_PIN_S2 = "pin_s2"
+CONF_PIN_S3 = "pin_s3"
+
+DEFAULT_DELAY = "2ms"
+
+
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(CD74HC4067Component),
+        cv.Required(CONF_PIN_S0): pins.internal_gpio_output_pin_schema,
+        cv.Required(CONF_PIN_S1): pins.internal_gpio_output_pin_schema,
+        cv.Required(CONF_PIN_S2): pins.internal_gpio_output_pin_schema,
+        cv.Required(CONF_PIN_S3): pins.internal_gpio_output_pin_schema,
+        cv.Optional(
+            CONF_DELAY, default=DEFAULT_DELAY
+        ): cv.positive_time_period_milliseconds,
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+
+    pin_s0 = await cg.gpio_pin_expression(config[CONF_PIN_S0])
+    cg.add(var.set_pin_s0(pin_s0))
+    pin_s1 = await cg.gpio_pin_expression(config[CONF_PIN_S1])
+    cg.add(var.set_pin_s1(pin_s1))
+    pin_s2 = await cg.gpio_pin_expression(config[CONF_PIN_S2])
+    cg.add(var.set_pin_s2(pin_s2))
+    pin_s3 = await cg.gpio_pin_expression(config[CONF_PIN_S3])
+    cg.add(var.set_pin_s3(pin_s3))
+
+    cg.add(var.set_switch_delay(config[CONF_DELAY]))