dts or fex file in Android?

[mandar.khire]

Hi,
I am trying to use External RTC DS1307 via I2C in Kernel space using Debian or Android for Wandboard, Olimex & other boards.
Some how I manage to use it in Olimex board. but using Mainline kernel (older version) & dts file.
I am curios about in Android for adding new device or device related entries where I should do changes?
For reference:-
I use few line specific dts file given in following link
http://stackoverflow.com/questions/33549211/how-to-add-i2c-devices-on-the-beaglebone-black-using-device-tree-overlays

But that works in Debian for Olimex board.
I am looking for Wandboard's Android.

Need Expert advice.
Thanks