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serial: imx: disable the receiver ready interrupt for imx_stop_rx

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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 <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huang Shijie 2014-05-23 12:32:54 +08:00 • committed by Greg Kroah-Hartman
parent e2f2786606
commit 85878399e7
1 changed files with 4 additions and 0 deletions
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4
drivers/tty/serial/imx.c
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@ -439,6 +439,10 @@ 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);
}
/*