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

Since commit 4dec2f119e ("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>
This commit is contained in:
Troy Kisky 2017-10-20 14:20:19 -07:00 committed by Greg Kroah-Hartman
parent b86f86e8e7
commit 52108109fa
1 changed files with 0 additions and 4 deletions
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4
drivers/tty/serial/imx.c
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@ -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;