[zephyr_mcumgr] add LED which is controled by bootloader (#16322)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

esphome/components/zephyr_mcumgr/ota/__init__.py

@@ -1,3 +1,4 @@
+from esphome import pins
 import esphome.codegen as cg
 from esphome.components.nrf52.boards import BOOTLOADER_CONFIG
 from esphome.components.nrf52.framework import include_west_project
@@ -19,6 +20,10 @@ import esphome.config_validation as cv
 from esphome.const import (
     CONF_HARDWARE_UART,
     CONF_ID,
+    CONF_INVERTED,
+    CONF_NUMBER,
+    CONF_PIN,
+    CONF_STATUS,
     KEY_CORE,
     KEY_FRAMEWORK_VERSION,
     Framework,
@@ -67,6 +72,11 @@ CONFIG_SCHEMA = cv.All(
                     ): cv.one_of(*UARTS, upper=True),
                 }
             ),
+            cv.Optional(CONF_STATUS): cv.Schema(
+                {
+                    cv.Required(CONF_PIN): pins.gpio_output_pin_schema,
+                }
+            ),
         }
     )
     .extend(BASE_OTA_SCHEMA)
@@ -165,6 +175,32 @@ async def to_code(config: ConfigType) -> None:
                 }};
                 """
         )
+    if CONF_STATUS in config:
+        pin_conf = config[CONF_STATUS][CONF_PIN]
+        pin_num = pin_conf[CONF_NUMBER]
+        port = pin_num // 32
+        pin_in_port = pin_num % 32
+        active_flag = (
+            "GPIO_ACTIVE_LOW" if pin_conf[CONF_INVERTED] else "GPIO_ACTIVE_HIGH"
+        )
+        zephyr_add_prj_conf("MCUBOOT_INDICATION_LED", True, image="mcuboot")
+        zephyr_add_overlay(
+            f"""
+                #include <dt-bindings/gpio/gpio.h>
+                / {{
+                    mcuboot_leds {{
+                        compatible = "gpio-leds";
+                        mcuboot_led0: mcuboot_led0 {{
+                            gpios = <&gpio{port} {pin_in_port} {active_flag}>;
+                        }};
+                    }};
+                    aliases {{
+                        mcuboot-led0 = &mcuboot_led0;
+                    }};
+                }};
+                """,
+            image="mcuboot",
+        )
     framework_ver = CORE.data[KEY_CORE][KEY_FRAMEWORK_VERSION]
     if framework_ver >= cv.Version(2, 9, 2):
         zephyr_data()[KEY_SYSBUILD] = True

tests/components/ota/test.nrf52-adafruit.yaml

@@ -2,3 +2,7 @@ zephyr_ble_server:
 
 ota:
   - platform: zephyr_mcumgr
+    status:
+      pin:
+        number: P0.15
+        inverted: true