diff --git a/drivers/watchdog/cdns_wdt.c b/drivers/watchdog/cdns_wdt.c
index f7618f86da..71575cb300 100644
--- a/drivers/watchdog/cdns_wdt.c
+++ b/drivers/watchdog/cdns_wdt.c
@@ -251,6 +251,7 @@ static const struct wdt_ops cdns_wdt_ops = {
 	.start = cdns_wdt_start,
 	.reset = cdns_wdt_reset,
 	.stop = cdns_wdt_stop,
+	/* There is no bit/reg/support in IP for expire_now functionality */
 };
 
 static const struct udevice_id cdns_wdt_ids[] = {