tty: serial: imx: disable ageing timer interrupt if dma in use

Since commit 4dec2f119e86 ("imx-serial: RX DMA startup latency")
the interrupt routine no longer will start rx dma.
So, we no longer need to enable this interrupt to start dma.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 2d042c6..bf3e981 100644 (file)
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1208,10 +1208,6 @@ static void imx_enable_dma(struct imx_port *sport)
        temp |= UCR1_RDMAEN | UCR1_TDMAEN | UCR1_ATDMAEN;
        writel(temp, sport->port.membase + UCR1);
 
-       temp = readl(sport->port.membase + UCR2);
-       temp |= UCR2_ATEN;
-       writel(temp, sport->port.membase + UCR2);
-
        imx_setup_ufcr(sport, TXTL_DMA, RXTL_DMA);
 
        sport->dma_is_enabled = 1;