diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 9271a1dceec3..9b6fc54967f2 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1344,7 +1344,7 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up)
 	u32 mvr, scheme;
 	u16 revision, major, minor;
 
-	mvr = serial_in(up, UART_OMAP_MVER);
+	mvr = readl(up->port.membase + (UART_OMAP_MVER << up->port.regshift));
 
 	/* Check revision register scheme */
 	scheme = mvr >> OMAP_UART_MVR_SCHEME_SHIFT;