Hi,
On Tue, Sep 19, 2017 at 11:22:35AM +0200, Uwe Kleine-König wrote:
> On Fri, Sep 15, 2017 at 05:32:16PM +0200, Clemens Gruber wrote:
<snip>
> > Any idea how to reproduce it? Can you be more specific about the
> > situation with and without this patch?
>
> Something that you might be able to reproduce on your side:
>
> enable gpio tracing (i.e.
> echo 1 > /sys/kernel/debug/tracing/events/gpio/enable)
>
> and then do
>
> cat /dev/ttymxcX
>
> . For me this makes RTS toggle (while IMHO it shouldn't).
Interesting.
I see two gpio_value set 0 events, when I cat /dev/ttymxcX and Ctrl+C.
The function_graph tracer shows that the first one comes from
imx_set_termios (called by uart_change_speed, after imx_startup).
The second gpio_value set 0 event comes from imx_stop_tx, called by
imx_shutdown.
Uwe: In your last mail, you wrote that rs485 works for you *now*.
What was the problem before? You said earlier that Ian's patch
did not fix the issues completely.
Best regards,
Clemens
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