Re: gpiod: Set pullup for Input Line

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Tue, Mar 22, 2022 at 10:39 AM Hans Kurscheidt <lve0200@xxxxxxxxx> wrote:
> Am 22.03.2022 um 09:36 schrieb Hans Kurscheidt:
> > Am 22.03.2022 um 01:59 schrieb Kent Gibson:

...

> > Still 1 more question. I understand the sense of a Pull-up in Input
> > mode, but reading the code, I see that the Bias option exists as well
> > for gpioset (Output). What is the sense of this, and what does it do?

I guess we started providing OPEN SOURCE / DRAIN in libgpiod v2.0
(Bart or Kent may correct me), but you should get an idea why it may
be useful.

On top of that, the pin can be reconfigured from input to output and
vice versa at run-time. So, keeping a bias setting will allow not to
think about it when pin direction is switched, although I agree this
may not be a clean case to use.

-- 
With Best Regards,
Andy Shevchenko