  We present results for the low-lying spectrum of D and D_s mesons from a
lattice QCD calculation on 2+1 flavor Clover-Wilson configurations generated by
the PACS-CS collaboration. In particular S- and P-wave states of charmed and
charmed-strange mesons are explored for pion masses down to 156MeV. For the
heavy quark, the Fermilab method is employed. In addition to ground states,
some excited states are extracted using the variational method. To check our
setup, calculations of the charmonium spectrum are also carried out. For
charmonium, the low-lying spectrum agrees favorably with experiment. For
heavy-strange and heavy-light systems substantial differences in comparison to
experiment values remain in channels with nearby scattering states.
