_opp_set_voltage
ret = _opp_set_voltage(dev, new_supply_vdd, vdd_uv, vdd_reg,
ret = _opp_set_voltage(dev, new_supply_vbb, 0, vbb_reg, "vbb");
ret = _opp_set_voltage(dev, new_supply_vbb, 0, vbb_reg, "vbb");
ret = _opp_set_voltage(dev, new_supply_vdd, vdd_uv, vdd_reg,
ret = _opp_set_voltage(dev, old_supply_vbb, 0, vbb_reg, "vbb");
ret = _opp_set_voltage(dev, old_supply_vdd, 0, vdd_reg,