ad5064_num_vref
for (i = 0; i < ad5064_num_vref(st); ++i)
return devm_regulator_bulk_get(dev, ad5064_num_vref(st),
regulator_bulk_disable(ad5064_num_vref(st), st->vref_reg);
ret = regulator_bulk_enable(ad5064_num_vref(st), st->vref_reg);