On Fri, 2018-06-01 at 16:11 +0200, Giulio Benetti wrote:
> It can be useful to override 8250 mctrl lines with gpios, for rts on
> rs485 for example, when rts is not mapped correctly to HW RTS pin.
>
> Enable SERIAL_MCTRL_GPIO by default.
>
Unfortunately NAK, see
commit 5db4f7f80d165fc9725f356e99feec409e446baa
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Tue Aug 16 15:06:54 2016 +0300
Revert "tty/serial/8250: use mctrl_gpio helpers"
for the details.
I would love to see a solution that will satisfy everyone, though I have
only means to test proposals for now.
> Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxx>
> ---
> drivers/tty/serial/8250/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/tty/serial/8250/Kconfig
> b/drivers/tty/serial/8250/Kconfig
> index f005eaf8bc57..c7992b94fece 100644
> --- a/drivers/tty/serial/8250/Kconfig
> +++ b/drivers/tty/serial/8250/Kconfig
> @@ -7,6 +7,7 @@ config SERIAL_8250
> tristate "8250/16550 and compatible serial support"
> depends on !S390
> select SERIAL_CORE
> + select SERIAL_MCTRL_GPIO if GPIOLIB
> ---help---
> This selects whether you want to include the driver for the
> standard
> serial ports. The standard answer is Y. People who might
> say N
--
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy
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