From 6f026d6b7cb6e019b6352ed7fb71497c787fd6d7 Mon Sep 17 00:00:00 2001 From: Jiada Wang Date: Tue, 9 Dec 2014 18:11:34 +0900 Subject: [PATCH] serial: imx: Enable UCR4_OREN in startup interface Other than enable Receiver Overrun Interrupt Enable (UCR4_OREN) in start_tx interface, UCR4_OREN should be enabled before enable of Receiver. Signed-off-by: Jiada Wang Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index d61b89e4a96e..79f485b99c3f 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -611,13 +611,6 @@ static void imx_start_tx(struct uart_port *port) temp &= ~(UCR1_RRDYEN); writel(temp, sport->port.membase + UCR1); } - /* Clear any pending ORE flag before enabling interrupt */ - temp = readl(sport->port.membase + USR2); - writel(temp | USR2_ORE, sport->port.membase + USR2); - - temp = readl(sport->port.membase + UCR4); - temp |= UCR4_OREN; - writel(temp, sport->port.membase + UCR4); if (!sport->dma_is_enabled) { temp = readl(sport->port.membase + UCR1); @@ -1178,6 +1171,14 @@ static int imx_startup(struct uart_port *port) writel(temp, sport->port.membase + UCR1); + /* Clear any pending ORE flag before enabling interrupt */ + temp = readl(sport->port.membase + USR2); + writel(temp | USR2_ORE, sport->port.membase + USR2); + + temp = readl(sport->port.membase + UCR4); + temp |= UCR4_OREN; + writel(temp, sport->port.membase + UCR4); + temp = readl(sport->port.membase + UCR2); temp |= (UCR2_RXEN | UCR2_TXEN); if (!sport->have_rtscts) -- 2.20.1