How to access Analog I/O pins from /sys/devices/platform/?

Hi All,

I want to connect one sensor to my BBB analog input pin(). To read that input I did not find any folder like /sys/devices/platform/tsc which contain analog input files ain1,ain2…
To glow user defnined LEDS i find /sys/devices/platform/LED folder. but i did not find tsc folder, Please suggest how can I get that folder for that do i need to upgrade any new image.
Please suggest solution for this

Thanks & Regards
Rama Krishna