stepon_timestep_init Subroutine

    subroutine stepon_timestep_init(dtime_phys, cam_runtime_opts, phys_state, phys_tend, dyn_in, dyn_out)
        ! Module(s) from CAM-SIMA.
        use dyn_comp, only: dyn_export_t, dyn_import_t
        use dyn_coupling, only: dynamics_to_physics_coupling
        use physics_types, only: physics_state, physics_tend
        use runtime_obj, only: runtime_options
        use time_manager, only: get_step_size
        ! Module(s) from CCPP.
        use ccpp_kinds, only: kind_phys

        real(kind_phys), intent(out) :: dtime_phys
        type(runtime_options), intent(in) :: cam_runtime_opts
        type(physics_state), intent(in) :: phys_state
        type(physics_tend), intent(in) :: phys_tend
        type(dyn_import_t), intent(in) :: dyn_in
        type(dyn_export_t), intent(in) :: dyn_out

        ! Set timestep for physics.
        dtime_phys = real(get_step_size(), kind_phys)

        call dynamics_to_physics_coupling()
    end subroutine stepon_timestep_init