MANUAL_REFERENCE_SHIFT
dpll_manu_ref_cfg &= (MANUAL_REFERENCE_MASK << MANUAL_REFERENCE_SHIFT);
*ref = dpll_manu_ref_cfg >> MANUAL_REFERENCE_SHIFT;
dpll_manu_ref_cfg &= ~(MANUAL_REFERENCE_MASK << MANUAL_REFERENCE_SHIFT);
dpll_manu_ref_cfg |= (ref << MANUAL_REFERENCE_SHIFT);