diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c
index d11621e2cf1d..245edbb68d4b 100644
--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -115,12 +115,16 @@ static void uniphier_serial_out(struct uart_port *p, int offset, int value)
  */
 static int uniphier_serial_dl_read(struct uart_8250_port *up)
 {
-	return readl(up->port.membase + UNIPHIER_UART_DLR);
+	int offset = UNIPHIER_UART_DLR << up->port.regshift;
+
+	return readl(up->port.membase + offset);
 }
 
 static void uniphier_serial_dl_write(struct uart_8250_port *up, int value)
 {
-	writel(value, up->port.membase + UNIPHIER_UART_DLR);
+	int offset = UNIPHIER_UART_DLR << up->port.regshift;
+
+	writel(value, up->port.membase + offset);
 }
 
 static int uniphier_of_serial_setup(struct device *dev, struct uart_port *port,