diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index c2be7cf91399..fcbaff894193 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -593,6 +593,11 @@ static int ar933x_config_rs485(struct uart_port *port,
 		dev_err(port->dev, "RS485 needs rts-gpio\n");
 		return 1;
 	}
+
+	if (rs485conf->flags & SER_RS485_ENABLED)
+		gpiod_set_value(up->rts_gpiod,
+			!!(rs485conf->flags & SER_RS485_RTS_AFTER_SEND));
+
 	port->rs485 = *rs485conf;
 	return 0;
 }