diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index ba42cef10a532df6fe0c4ecf85384d257f9c1c8d..cb0321ea853c107913499e0c547d9d15768d699d 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1843,6 +1843,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
 		of_child = of_get_child_by_name(pdev->dev.of_node, name);
 		if (of_child && of_device_is_available(of_child))
 			channels_mask |= BIT(i);
+		of_node_put(of_child);
 	}
 
 	if (chip_id != RENESAS_RZG2L) {
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
index 9b47b07162fe5292aca355aaf45ba008189be6a0..bc6518504fd463ccadb9d2014109838ffe94a24b 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -1690,8 +1690,8 @@ static int mcp251xfd_register_chip_detect(struct mcp251xfd_priv *priv)
 	u32 osc;
 	int err;
 
-	/* The OSC_LPMEN is only supported on MCP2518FD, so use it to
-	 * autodetect the model.
+	/* The OSC_LPMEN is only supported on MCP2518FD and MCP251863,
+	 * so use it to autodetect the model.
 	 */
 	err = regmap_update_bits(priv->map_reg, MCP251XFD_REG_OSC,
 				 MCP251XFD_REG_OSC_LPMEN,
@@ -1703,10 +1703,18 @@ static int mcp251xfd_register_chip_detect(struct mcp251xfd_priv *priv)
 	if (err)
 		return err;
 
-	if (osc & MCP251XFD_REG_OSC_LPMEN)
-		devtype_data = &mcp251xfd_devtype_data_mcp2518fd;
-	else
+	if (osc & MCP251XFD_REG_OSC_LPMEN) {
+		/* We cannot distinguish between MCP2518FD and
+		 * MCP251863. If firmware specifies MCP251863, keep
+		 * it, otherwise set to MCP2518FD.
+		 */
+		if (mcp251xfd_is_251863(priv))
+			devtype_data = &mcp251xfd_devtype_data_mcp251863;
+		else
+			devtype_data = &mcp251xfd_devtype_data_mcp2518fd;
+	} else {
 		devtype_data = &mcp251xfd_devtype_data_mcp2517fd;
+	}
 
 	if (!mcp251xfd_is_251XFD(priv) &&
 	    priv->devtype_data.model != devtype_data->model) {