diff options
| author | Fugang Duan <b38611@freescale.com> | 2015-03-30 10:47:23 +0800 |
|---|---|---|
| committer | guoyin.chen <guoyin.chen@freescale.com> | 2015-05-08 17:24:57 +0800 |
| commit | e0b909fd5c9eb4c6973d3bbb4d81b6894914622b (patch) | |
| tree | 0333e24a6131572b9d262e8ce39480bdfc26b322 /drivers | |
| parent | eb558e710fe103ed744bdc5649bb1be136c0a43e (diff) | |
MLK-10274 tty: serial: clear AWAKE bit after resume back
When uart port (non-console port) in dma mode and use uart as remote wakeup
source, after resume back, the AWAKE bit is not cleared most of interrupts
are disabled. And then let system suspend state, system resume back immediately
without any wake up action. So we need to clear the AWAKE bit after resume
back in DMA mode.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/imx.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 2e1a48cb511c..86222dc3c26b 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1985,6 +1985,9 @@ static int serial_imx_resume(struct platform_device *dev) val = readl(sport->port.membase + UCR3); val &= ~(UCR3_AWAKEN | UCR3_AIRINTEN); writel(val, sport->port.membase + UCR3); + val = readl(sport->port.membase + USR1); + if (val & USR1_AWAKE) + writel(USR1_AWAKE, sport->port.membase + USR1); uart_resume_port(&imx_reg, &sport->port); |