CECB_RW_REG
ret = regmap_write(ao_cec->regmap, CECB_RW_REG, reg);
ret = regmap_read_poll_timeout(ao_cec->regmap, CECB_RW_REG, reg,
ret = regmap_read(ao_cec->regmap, CECB_RW_REG, ®);
return regmap_write(ao_cec->regmap, CECB_RW_REG, reg);