can_bit_time
bt->bitrate = priv->clock.freq / (bt->brp * can_bit_time(bt));
bt->sample_point = ((CAN_SYNC_SEG + tseg1) * 1000) / can_bit_time(bt);
(bt->brp * can_bit_time(bt));
tx_conf_msg.bit_time = cpu_to_le32(can_bit_time(bt));
return can_bit_time(bt) * bt->brp;