diff options
| author |   Jiada Wang <jiada_wang@mentor.com> | 2014-12-09 18:11:34 +0900 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-09 14:23:59 -0800 |
| commit | 6f026d6b7cb6e019b6352ed7fb71497c787fd6d7 (patch) | |
| tree | 9e3f044676513231a4a2471a6279f1aeda822256 /drivers/tty/serial/imx.c | |
| parent | serial: imx: start rx_dma once RXFIFO is not empty (diff) | |
| download | linux-dev-6f026d6b7cb6e019b6352ed7fb71497c787fd6d7.tar.xz linux-dev-6f026d6b7cb6e019b6352ed7fb71497c787fd6d7.zip | |
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 <jiada_wang@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 15 |
1 files 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) |