IXP4XX_EXP_CNFG2
regmap_write(npe->rmap, IXP4XX_EXP_CNFG2, val & ~reset_bit);
regmap_write(npe->rmap, IXP4XX_EXP_CNFG2, val | reset_bit);
regmap_read(rmap, IXP4XX_EXP_CNFG2, &val);