Add gp8403 output component (#4495)

Co-authored-by: Samuel Sieb <samuel-github@sieb.net>

esphome/components/gp8403/__init__.py

@@ -0,0 +1,40 @@
+import esphome.config_validation as cv
+import esphome.codegen as cg
+
+from esphome.components import i2c
+from esphome.const import CONF_ID, CONF_VOLTAGE
+
+CODEOWNERS = ["@jesserockz"]
+DEPENDENCIES = ["i2c"]
+MULTI_CONF = True
+
+gp8403_ns = cg.esphome_ns.namespace("gp8403")
+GP8403 = gp8403_ns.class_("GP8403", cg.Component, i2c.I2CDevice)
+
+GP8403Voltage = gp8403_ns.enum("GP8403Voltage")
+
+CONF_GP8403_ID = "gp8403_id"
+
+VOLTAGES = {
+    "5V": GP8403Voltage.GP8403_VOLTAGE_5V,
+    "10V": GP8403Voltage.GP8403_VOLTAGE_10V,
+}
+
+CONFIG_SCHEMA = (
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(GP8403),
+            cv.Required(CONF_VOLTAGE): cv.enum(VOLTAGES, upper=True),
+        }
+    )
+    .extend(cv.COMPONENT_SCHEMA)
+    .extend(i2c.i2c_device_schema(0x58))
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await i2c.register_i2c_device(var, config)
+
+    cg.add(var.set_voltage(config[CONF_VOLTAGE]))