diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index ae817f0f5281..c37f939b2b23 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/rational.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
@@ -1326,11 +1327,19 @@ static void imx_uart_disable_dma(struct imx_port *sport)
 static int imx_uart_startup(struct uart_port *port)
 {
 	struct imx_port *sport = (struct imx_port *)port;
+	struct tty_port *tty_port = &sport->port.state->port;
 	int retval, i;
 	unsigned long flags;
 	int dma_is_inited = 0;
 	u32 ucr1, ucr2, ucr4;
 
+	/* some modem may need reset */
+	if (!tty_port_suspended(tty_port)) {
+		retval = device_reset(sport->port.dev);
+		if (retval && retval != -ENOENT)
+			return retval;
+	}
+
 	retval = clk_prepare_enable(sport->clk_per);
 	if (retval)
 		return retval;