pps_ioctl
err = pps_ioctl(cmd, data, &sc->pps_state);
err = pps_ioctl(cmd, data, &sc->pps_state);
err = pps_ioctl(cmd, data, &sc->pps[subdev]);
return pps_ioctl(cmd, data, &sc->sc_pps);
error = pps_ioctl(cmd, data, &sc->sc_pps);
error = pps_ioctl(cmd, arg, &elan_pps);
int pps_ioctl(unsigned long cmd, caddr_t data, struct pps_state *pps);