diff --git a/can-calc-bit-timing.c b/can-calc-bit-timing.c
index 3c18d09..5d4bc82 100644
--- a/can-calc-bit-timing.c
+++ b/can-calc-bit-timing.c
@@ -595,6 +595,133 @@ static const unsigned int common_data_bitrates[] = {
  * in the header file linux/can/netlink.h.
  */
 
+/*
+ * imported from v3.18-rc1~52^2~248^2~1
+ *
+ * b25a437206ed can: dev: remove unused variable from can_calc_bittiming() function
+ */
+#undef can_calc_bittiming
+#undef can_update_spt
+#define can_calc_bittiming can_calc_bittiming_v3_18
+#define can_update_spt can_update_spt_v3_18
+
+static int can_update_spt(const struct can_bittiming_const *btc,
+			  int sampl_pt, int tseg, int *tseg1, int *tseg2)
+{
+	*tseg2 = tseg + 1 - (sampl_pt * (tseg + 1)) / 1000;
+	if (*tseg2 < btc->tseg2_min)
+		*tseg2 = btc->tseg2_min;
+	if (*tseg2 > btc->tseg2_max)
+		*tseg2 = btc->tseg2_max;
+	*tseg1 = tseg - *tseg2;
+	if (*tseg1 > btc->tseg1_max) {
+		*tseg1 = btc->tseg1_max;
+		*tseg2 = tseg - *tseg1;
+	}
+	return 1000 * (tseg + 1 - *tseg2) / (tseg + 1);
+}
+
+static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
+			      const struct can_bittiming_const *btc)
+{
+	struct can_priv *priv = netdev_priv(dev);
+	long best_error = 1000000000, error = 0;
+	int best_tseg = 0, best_brp = 0, brp = 0;
+	int tsegall, tseg = 0, tseg1 = 0, tseg2 = 0;
+	int spt_error = 1000, spt = 0, sampl_pt;
+	long rate;
+	u64 v64;
+
+	/* Use CIA recommended sample points */
+	if (bt->sample_point) {
+		sampl_pt = bt->sample_point;
+	} else {
+		if (bt->bitrate > 800000)
+			sampl_pt = 750;
+		else if (bt->bitrate > 500000)
+			sampl_pt = 800;
+		else
+			sampl_pt = 875;
+	}
+
+	/* tseg even = round down, odd = round up */
+	for (tseg = (btc->tseg1_max + btc->tseg2_max) * 2 + 1;
+	     tseg >= (btc->tseg1_min + btc->tseg2_min) * 2; tseg--) {
+		tsegall = 1 + tseg / 2;
+		/* Compute all possible tseg choices (tseg=tseg1+tseg2) */
+		brp = priv->clock.freq / (tsegall * bt->bitrate) + tseg % 2;
+		/* chose brp step which is possible in system */
+		brp = (brp / btc->brp_inc) * btc->brp_inc;
+		if ((brp < btc->brp_min) || (brp > btc->brp_max))
+			continue;
+		rate = priv->clock.freq / (brp * tsegall);
+		error = bt->bitrate - rate;
+		/* tseg brp biterror */
+		if (error < 0)
+			error = -error;
+		if (error > best_error)
+			continue;
+		best_error = error;
+		if (error == 0) {
+			spt = can_update_spt(btc, sampl_pt, tseg / 2,
+					     &tseg1, &tseg2);
+			error = sampl_pt - spt;
+			if (error < 0)
+				error = -error;
+			if (error > spt_error)
+				continue;
+			spt_error = error;
+		}
+		best_tseg = tseg / 2;
+		best_brp = brp;
+		if (error == 0)
+			break;
+	}
+
+	if (best_error) {
+		/* Error in one-tenth of a percent */
+		error = (best_error * 1000) / bt->bitrate;
+		if (error > CAN_CALC_MAX_ERROR) {
+			netdev_err(dev,
+				   "bitrate error %ld.%ld%% too high\n",
+				   error / 10, error % 10);
+			return -EDOM;
+		} else {
+			netdev_warn(dev, "bitrate error %ld.%ld%%\n",
+				    error / 10, error % 10);
+		}
+	}
+
+	/* real sample point */
+	bt->sample_point = can_update_spt(btc, sampl_pt, best_tseg,
+					  &tseg1, &tseg2);
+
+	v64 = (u64)best_brp * 1000000000UL;
+	do_div(v64, priv->clock.freq);
+	bt->tq = (u32)v64;
+	bt->prop_seg = tseg1 / 2;
+	bt->phase_seg1 = tseg1 - bt->prop_seg;
+	bt->phase_seg2 = tseg2;
+
+	/* check for sjw user settings */
+	if (!bt->sjw || !btc->sjw_max)
+		bt->sjw = 1;
+	else {
+		/* bt->sjw is at least 1 -> sanitize upper bound to sjw_max */
+		if (bt->sjw > btc->sjw_max)
+			bt->sjw = btc->sjw_max;
+		/* bt->sjw must not be higher than tseg2 */
+		if (tseg2 < bt->sjw)
+			bt->sjw = tseg2;
+	}
+
+	bt->brp = best_brp;
+	/* real bit-rate */
+	bt->bitrate = priv->clock.freq / (bt->brp * (tseg1 + tseg2 + 1));
+
+	return 0;
+}
+
 /*
  * imported from v4.8-rc1~140^2~304^2~11
  *
@@ -757,6 +884,9 @@ static const struct can_calc_bittiming calc_bittiming_list[] = {
 	{
 		.alg = can_calc_bittiming_v4_8,
 		.name = "v4.8",
+	}, {
+		.alg = can_calc_bittiming_v3_18,
+		.name = "v3.18",
 	},
 };