--- zzzz-none-000/linux-2.6.28.10/drivers/rtc/Kconfig	2009-05-02 18:54:43.000000000 +0000
+++ puma5-6360-529/linux-2.6.28.10/drivers/rtc/Kconfig	2010-04-27 09:58:49.000000000 +0000
@@ -679,4 +679,11 @@
 	  If you say Y here you will get support for the RTC found on
 	  Starfire systems.
 
+config RTC_DRV_AVM_REF_CLOCK
+    tristate "RTC Driver for external Clock source (DECT)"
+    depends on RTC_CLASS || AVM_DECT || ISDN_CAPI
+    default n
+    help
+        Clock source for Calibrate RTC device driver
+
 endif # RTC_CLASS