VOL_STEP_mB
step_gain_mB = VOL_STEP_mB;
uinfo->value.integer.min = min_gain_mB / VOL_STEP_mB;
uinfo->value.integer.max = max_gain_mB / VOL_STEP_mB;
uinfo->value.integer.step = step_gain_mB / VOL_STEP_mB;
ucontrol->value.integer.value[0] = an_gain_mB[0] / VOL_STEP_mB;
ucontrol->value.integer.value[1] = an_gain_mB[1] / VOL_STEP_mB;
(ucontrol->value.integer.value[0]) * VOL_STEP_mB;
(ucontrol->value.integer.value[1]) * VOL_STEP_mB;
static const DECLARE_TLV_DB_SCALE(db_scale_100, -10000, VOL_STEP_mB, 0);