I'm having the same problem as you. There's a few rtc modules configured in the kernel:
$ grep CONFIG_RTC /boot/config-2.6.27-7-generic
CONFIG_RTC_CLASS=y
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_DRV_DS1305=m
CONFIG_RTC_DRV_DS1307=m
CONFIG_RTC_DRV_DS1374=m
# CONFIG_RTC_DRV_DS1511 is not set
CONFIG_RTC_DRV_DS1553=m
CONFIG_RTC_DRV_DS1672=m
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_FM3130=m
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_M41T80=m
CONFIG_RTC_DRV_M41T80_WDT=y
CONFIG_RTC_DRV_M41T94=m
CONFIG_RTC_DRV_M48T59=m
CONFIG_RTC_DRV_M48T86=m
CONFIG_RTC_DRV_MAX6900=m
CONFIG_RTC_DRV_MAX6902=m
CONFIG_RTC_DRV_PCF8563=m
CONFIG_RTC_DRV_PCF8583=m
# CONFIG_RTC_DRV_R9701 is not set
CONFIG_RTC_DRV_RS5C348=m
CONFIG_RTC_DRV_RS5C372=m
# CONFIG_RTC_DRV_S35390A is not set
CONFIG_RTC_DRV_STK17TA8=m
CONFIG_RTC_DRV_TEST=m
CONFIG_RTC_DRV_V3020=m
CONFIG_RTC_DRV_X1205=m
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_LIB=y
And there's /dev/rtc0 but not /dev/rtc
$ ls -l /dev/rtc*
crw-rw---- 1 root root 254, 0 2008-10-21 22:04 /dev/rtc0
I'm having the same problem as you. There's a few rtc modules configured in the kernel:
$ grep CONFIG_RTC /boot/config- 2.6.27- 7-generic RTC_DRV_ CMOS=y RTC_DRV_ DS1305= m RTC_DRV_ DS1307= m RTC_DRV_ DS1374= m RTC_DRV_ DS1511 is not set RTC_DRV_ DS1553= m RTC_DRV_ DS1672= m RTC_DRV_ DS1742= m RTC_DRV_ FM3130= m RTC_DRV_ ISL1208= m RTC_DRV_ M41T80= m RTC_DRV_ M41T80_ WDT=y RTC_DRV_ M41T94= m RTC_DRV_ M48T59= m RTC_DRV_ M48T86= m RTC_DRV_ MAX6900= m RTC_DRV_ MAX6902= m RTC_DRV_ PCF8563= m RTC_DRV_ PCF8583= m RTC_DRV_ R9701 is not set RTC_DRV_ RS5C348= m RTC_DRV_ RS5C372= m RTC_DRV_ S35390A is not set RTC_DRV_ STK17TA8= m RTC_DRV_ TEST=m RTC_DRV_ V3020=m RTC_DRV_ X1205=m RTC_HCTOSYS= y RTC_HCTOSYS_ DEVICE= "rtc0" RTC_INTF_ DEV=y RTC_INTF_ DEV_UIE_ EMUL=y RTC_INTF_ PROC=y RTC_INTF_ SYSFS=y
CONFIG_RTC_CLASS=y
# CONFIG_RTC_DEBUG is not set
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CONFIG_RTC_LIB=y
And there's /dev/rtc0 but not /dev/rtc
$ ls -l /dev/rtc*
crw-rw---- 1 root root 254, 0 2008-10-21 22:04 /dev/rtc0