On Fri, May 23, 2014 at 08:10:36AM +0200, Dirk Behme wrote: > On 23.05.2014 06:32, Huang Shijie wrote: > >This patch disables the receiver ready interrupt for imx_stop_rx. > >It reduces the interrupt numbers when the uart is going to close > >or suspend. > > > >Signed-off-by: Huang Shijie <b32...@freescale.com> > >--- > > drivers/tty/serial/imx.c | 4 ++++ > > 1 files changed, 4 insertions(+), 0 deletions(-) > > > >diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c > >index ed6cdf7..6026101 100644 > >--- a/drivers/tty/serial/imx.c > >+++ b/drivers/tty/serial/imx.c > >@@ -440,6 +440,10 @@ static void imx_stop_rx(struct uart_port *port) > > > > temp = readl(sport->port.membase + UCR2); > > writel(temp & ~UCR2_RXEN, sport->port.membase + UCR2); > >+ > >+ /* disable the `Receiver Ready Interrrupt` */ > >+ temp = readl(sport->port.membase + UCR1); > >+ writel(temp & ~UCR1_RRDYEN, sport->port.membase + UCR1); > > } > > While this is about the RX irq, I've a slightly off-topic general > question regarding the usage of the *TX* irq in TX DMA mode: > > It seems to me that the TX irq is kept enabled while the TX DMA is Not really :)
We disable the TXMPTYEN when the DMA is enabled. thanks Huang Shijie -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
