On Tue, Mar 13, 2012 at 11:35:21AM +0530, Laxman Dewangan wrote:
> Settling time is require when there is dcdc rail's voltage change.
> Returning proper delay time for dcdc voltage change to settle down
> the output voltage to new value.

This one doesn't apply, can you check against current topic/drivers
please?  I suspect a collision with some of Axel's work.