How to get control over Power LED

[Tekale Sharad-FHJN78]

Hi ,
 
How can I get control over Power LED?
 
My requirement is I can be able to control Power LED by using /proc file
system.
 
If I set value in /proc/sys/led /power to 1, then PowerLED should glow, 
where as if I set it to 0, PowerLED should turn off.
 
Can some one provide me either some link which talks about how to
implement 
 
or , point to some piece of code for implementing the behavior,  or some
brief idea towards achieving  the behavior.
 
Thanks,
Sharad