Re: Regarding export of GPIOs

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Fri, Aug 20, 2021 at 6:27 AM Riz <mdrizwan827@xxxxxxxxx> wrote:
>
> Hello,
> I have some basic questions around the exporting of a GPIO.
>
> 1. Regarding gpio-hog mechanism:
> The gpio-hog mechanism would help us to initialise a GPIO to either
> high/low & in/out during bootup.
> This is fine.
>
> So my question is, if we hog a GPIO, does it also gets exported to the
> userspace by default?
>
>
> 2. With the older sysfs interface, we would be using "echo x >
> /sys/class/gpio/export" to export the gpiox to userspace.
>
> I wanted to know what would be the right way to do this with the newer
> interface?
>
> 3. To check if a GPIO is being exported or not, we would see the
> /sys/class/gpio with the sysfs interface.
>
> With the newer character device interface, what would be the right way
> to check what GPIOs are exported to userspace?
>
> Looking forward to hearing from you

https://stackoverflow.com/questions/68856801/regarding-gpio-export ?

I think I pretty much answered there.


-- 
With Best Regards,
Andy Shevchenko