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From: Huang Shijie <b32955@freescale.com>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Huang Shijie <b32955@freescale.com>
Subject: [PATCH 2/2] serial: imx: disable the receiver ready interrupt for imx_stop_rx
Date: Fri, 23 May 2014 12:32:54 +0800	[thread overview]
Message-ID: <1400819575-20435-2-git-send-email-b32955@freescale.com> (raw)
In-Reply-To: <1400819575-20435-1-git-send-email-b32955@freescale.com>

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>
---
 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);
 }
 
 /*
-- 
1.7.8

  reply	other threads:[~2014-05-23  4:32 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-23  4:32 [PATCH 1/2] serial: imx: remove the DMA wait queue Huang Shijie
2014-05-23  4:32 ` Huang Shijie [this message]
2014-05-23  6:10   ` [PATCH 2/2] serial: imx: disable the receiver ready interrupt for imx_stop_rx Dirk Behme
2014-05-23  8:04     ` Huang Shijie
2014-05-30  5:52   ` Dirk Behme
2014-05-30  4:53     ` Huang Shijie
2014-05-23  4:40 ` [PATCH 1/2 rebased] serial: imx: remove the DMA wait queue Huang Shijie
2014-05-30  9:27 ` [PATCH 1/2] " Wang, Jiada (ESD)
2014-05-30  9:01   ` Huang Shijie

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