[ARM] 4996/1: <IMX UART>: do not enable tx empty interrupt on startup

We are not interested in tranceiver empty interrupts until we actually
sent a buffer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index f759664..dd1e071 100644 (file)
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -536,7 +536,7 @@ static int imx_startup(struct uart_port *port)
        writel(USR1_RTSD, sport->port.membase + USR1);
 
        temp = readl(sport->port.membase + UCR1);
-       temp |= (UCR1_TXMPTYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN);
+       temp |= UCR1_RRDYEN | UCR1_RTSDEN | UCR1_UARTEN;
        writel(temp, sport->port.membase + UCR1);
 
        temp = readl(sport->port.membase + UCR2);