RTC M41t82 issue

Hai sir,

I am using beaglebone black board rev c for our project purpose. This document is used for building. http://www.jumpnowtek.com/beaglebone/BeagleBone-Systems-with-Yocto.html

I need to add one external rtc (stm,m41t82) for our project purpose.
i am integrating the external rtc (stm,m41t82)through i2c2 channels.
i2cdetct -y -r 2 command shows my rtc is detect in 0x68 address.
after that i tried this one
echo mt4182 0x68 >/sys/bus/i2c/devices/i2c-2/new_devic
i couldn’t find out the name which i given to rtc to executing the following command.

cat /sys/class/rtc/rtc1/name

i am refering the below document for rtc purpose
could u please help me to resolve this issue.