samples: nrf_compress: mcuboot_update: Add boot message

Adds an optional boot message to aid in testing this sample

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

samples/nrf_compress/mcuboot_update/Kconfig

@@ -0,0 +1,13 @@
+#
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+config OUTPUT_BOOT_MESSAGE
+	bool "Output message on boot"
+	help
+	  Will output a dummy message on boot, this is to allow for generating a different image
+	  that can be used to test the compressed firmware update.
+
+source "Kconfig.zephyr"

samples/nrf_compress/mcuboot_update/src/hook.c

@@ -82,6 +82,10 @@ static int setup_slot_hook(void)
 	mgmt_callback_register(&image_slot_callback);
 	k_work_init(&slot_output_work, slot_output_handler);
 
+#if defined(CONFIG_OUTPUT_BOOT_MESSAGE)
+	LOG_INF("Dummy message indicating new firmware is running...");
+#endif
+
 	return 0;
 }