diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 36acbcc..62e6eb1 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -976,11 +976,15 @@
 	depends on SERIAL_68328
 
 config SERIAL_COLDFIRE
-	bool "ColdFire serial support"
+	bool "ColdFire serial support (DEPRECATED)"
 	depends on COLDFIRE
 	help
 	  This driver supports the built-in serial ports of the Motorola ColdFire
 	  family of CPUs.
+	  This driver is deprecated because it supports only the old interface
+	  for serial drivers and features like magic keys are not working.
+	  Please switch to the new style driver because this driver will be
+	  removed soon.
 
 config SERIAL_MCF
 	bool "Coldfire serial support (new style driver)"
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
index 43af40d..56007cc 100644
--- a/drivers/serial/mcfserial.c
+++ b/drivers/serial/mcfserial.c
@@ -1,3 +1,4 @@
+#warning This driver is deprecated. Check Kconfig for details.
 /*
  * mcfserial.c -- serial driver for ColdFire internal UARTS.
  *