AT_CTRL_POST_CHANGE_DLY_MASK
val &= ~(FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, AT_CTRL_POST_CHANGE_DLY));
val |= FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, 0x2);
val |= FIELD_PREP(AT_CTRL_POST_CHANGE_DLY_MASK, AT_CTRL_POST_CHANGE_DLY);