  A viable model for inflation driven by a torsion function in a Friedmann
background is presented. The scalar spectral index in the interval
$0.92\lesssim n_{s}\lesssim 0.97$ is obtained in order to satisfy the initial
conditions for inflation. The post inflationary phase is also studied, and the
analytical solutions obtained for scale factor and energy density generalizes
that ones for a matter dominated universe, indicating just a small deviation
from the standard model evolution. The same kind of torsion function used also
describes satisfactorily the recent acceleration of the universe, which could
indicate a possible unification of different phases, apart form specific
constants.
