diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 6b6909d9c005..bc968143fb97 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2587,6 +2587,10 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
 {
 	struct uart_8250_port *up = up_to_u8250p(port);
 
+#ifdef CONFIG_ARCH_ROCKCHIP
+	serial_port_out(port, UART_MCR, UART_MCR_LOOP);
+#endif
+
 	/* Workaround to enable 115200 baud on OMAP1510 internal ports */
 	if (is_omap1510_8250(up)) {
 		if (baud == 115200) {
@@ -2607,6 +2611,13 @@ void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
 
 	serial_dl_write(up, quot);
 
+#ifdef CONFIG_ARCH_ROCKCHIP
+	serial_port_out(port, UART_MCR, up->mcr);
+	if (quot != serial_dl_read(up))
+		pr_warn_ratelimited("ttyS%d set divisor fail, quot:%d != dll,dlh:%d\n",
+					 serial_index(port), quot, serial_dl_read(up));
+#endif
+
 	/* XR17V35x UARTs have an extra fractional divisor register (DLD) */
 	if (up->port.type == PORT_XR17V35X) {
 		/* Preserve bits not related to baudrate; DLD[7:4]. */
@@ -2721,6 +2732,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 	if ((termios->c_cflag & CREAD) == 0)
 		port->ignore_status_mask |= UART_LSR_DR;
 
+#ifndef CONFIG_ARCH_ROCKCHIP
 	/*
 	 * CTS flow control flag and modem status interrupts
 	 */
@@ -2734,6 +2746,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 		up->ier |= UART_IER_RTOIE;
 
 	serial_port_out(port, UART_IER, up->ier);
+#endif
 
 	if (up->capabilities & UART_CAP_EFR) {
 		unsigned char efr = 0;
@@ -2752,7 +2765,13 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 			serial_port_out(port, UART_EFR, efr);
 	}
 
+#ifdef CONFIG_ARCH_ROCKCHIP
+	/* Reset uart to make sure it is idle, then set buad rate */
+	serial_port_out(port, 0x88 >> 2, 0x7);
+#endif
+
 	serial8250_set_divisor(port, baud, quot, frac);
+
 #ifdef CONFIG_ARCH_ROCKCHIP
 	up->fcr = UART_FCR_ENABLE_FIFO | UART_FCR_T_TRIG_10 | UART_FCR_R_TRIG_10;
 #endif
@@ -2771,6 +2790,23 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios,
 		serial_port_out(port, UART_FCR, up->fcr);	/* set fcr */
 	}
 	serial8250_set_mctrl(port, port->mctrl);
+
+#ifdef CONFIG_ARCH_ROCKCHIP
+	/*
+	 * CTS flow control flag and modem status interrupts
+	 */
+	up->ier &= ~UART_IER_MSI;
+	if (!(up->bugs & UART_BUG_NOMSR) &&
+			UART_ENABLE_MS(&up->port, termios->c_cflag))
+		up->ier |= UART_IER_MSI;
+	if (up->capabilities & UART_CAP_UUE)
+		up->ier |= UART_IER_UUE;
+	if (up->capabilities & UART_CAP_RTOIE)
+		up->ier |= UART_IER_RTOIE;
+
+	serial_port_out(port, UART_IER, up->ier);
+#endif
+
 	spin_unlock_irqrestore(&port->lock, flags);
 	serial8250_rpm_put(up);