CECB_LOCK_BUF
ret |= regmap_write(ao_cec->regmap_cec, CECB_LOCK_BUF, 0);
regmap_write(ao_cec->regmap_cec, CECB_LOCK_BUF, 0);
ret = regmap_read(ao_cec->regmap_cec, CECB_LOCK_BUF, &val);