REG_ASRDI
regmap_write(asrc->regmap, REG_ASRDI(pair->index), 0);
regmap_write(asrc->regmap, REG_ASRDI(index), 0);
#define REG_ASRDx(x, i) ((x) == IN ? REG_ASRDI(i) : REG_ASRDO(i))