AW88399_VOL_START_BIT
real_value = (real_value << AW88399_VOL_START_BIT) | (reg_value & AW88399_VOL_MASK);
AW88399_VOL_START_BIT;
(~(((1<<AW88399_VOL_BITS_LEN)-1) << AW88399_VOL_START_BIT))