Re: [PATCH] serial: imx: warn user when using unsupported configuration

2018-04-18 Thread Uwe Kleine-König
Hello Stefan, On Wed, Apr 18, 2018 at 03:32:17PM +0200, Stefan Agner wrote: > diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c > index 91f3a1a5cb7f..1ba7e98ddc76 100644 > --- a/drivers/tty/serial/imx.c > +++ b/drivers/tty/serial/imx.c > @@ -1833,6 +1833,10 @@ static int

Re: [PATCH] serial: imx: warn user when using unsupported configuration

2018-04-18 Thread Uwe Kleine-König
Hello Stefan, On Wed, Apr 18, 2018 at 03:32:17PM +0200, Stefan Agner wrote: > diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c > index 91f3a1a5cb7f..1ba7e98ddc76 100644 > --- a/drivers/tty/serial/imx.c > +++ b/drivers/tty/serial/imx.c > @@ -1833,6 +1833,10 @@ static int

[PATCH] serial: imx: warn user when using unsupported configuration

2018-04-18 Thread Stefan Agner
When using half-duplex mode (which disables receiver during txing) the RTS signal cannot be driven low during transmission. This seems to be a limitation of the i.MX UART IP: The RTS (CTS_B) signal is controlled by the receiver. When the receiver is disabled, the signal stays in UART logic idle

[PATCH] serial: imx: warn user when using unsupported configuration

2018-04-18 Thread Stefan Agner
When using half-duplex mode (which disables receiver during txing) the RTS signal cannot be driven low during transmission. This seems to be a limitation of the i.MX UART IP: The RTS (CTS_B) signal is controlled by the receiver. When the receiver is disabled, the signal stays in UART logic idle