From: Fabio Estevam <festevam@xxxxxxxxx> Sent: Friday, January 05, 2018 1:59 AM
>The wakeup mechanism via RTSDEN bit relies on the system using the RTS/CTS
>lines, so only allow such wakeup method when the system actually has
>RTS/CTS support.
>
>Fixes: bc85734b126f ("serial: imx: allow waking up on RTSD")
>Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
>---
> drivers/tty/serial/imx.c | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
>diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index
>c2b29fd..7143da3 100644
>--- a/drivers/tty/serial/imx.c
>+++ b/drivers/tty/serial/imx.c
>@@ -2225,12 +2225,14 @@ static void serial_imx_enable_wakeup(struct
>imx_port *sport, bool on)
> val &= ~UCR3_AWAKEN;
> writel(val, sport->port.membase + UCR3);
>
>- val = readl(sport->port.membase + UCR1);
>- if (on)
>- val |= UCR1_RTSDEN;
>- else
>- val &= ~UCR1_RTSDEN;
>- writel(val, sport->port.membase + UCR1);
>+ if (sport->have_rtscts) {
>+ val = readl(sport->port.membase + UCR1);
>+ if (on)
>+ val |= UCR1_RTSDEN;
>+ else
>+ val &= ~UCR1_RTSDEN;
>+ writel(val, sport->port.membase + UCR1);
>+ }
> }
>
> static int imx_serial_port_suspend_noirq(struct device *dev)
>--
>2.7.4
Acked-by: Fugang Duan <fugang.duan@xxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
