Re: [PATCH v2 09/10] gpio: aggregator: cancel deferred probe for devices created via configfs

[Bartosz Golaszewski <brgl@xxxxxxxx>]

On Sun, Feb 16, 2025 at 2:15 PM Koichiro Den <koichiro.den@xxxxxxxxxxxxx> wrote:
>
> >
> > On one hand, I agree that it would make some scenarios simpler, and
> > let us propagate an error code to the sysfs writer in case of failure.
> >
> > On the other hand, it would change user behavior. Currently people can
> > configure a GPIO aggregator, and load the driver module for the parent
> > gpiochip later, relying on deferred probing to bring up everything
> > when it is ready.
>
> Thank you both for your insights, Bartosz and Geert. I've just sent v3
> (https://lore.kernel.org/all/20250216125816.14430-1-koichiro.den@xxxxxxxxxxxxx/)
> which retains the current behavior, to not suprise anyone now.
> I'm now considering whether we might eventually deprecate the sysfs
> interface in the future. Doing so could simplify the codebase and bring it
> in line with gpio-sim and gpio-virtuser.
>

Heh, yeah you'd think so. You can watch my talk[1] on how easy it is
to remove sysfs interfaces. :)

Bartosz

[1] https://fosdem.org/2025/schedule/event/fosdem-2025-5288-the-status-of-removing-sys-class-gpio-and-the-global-gpio-numberspace-from-the-kernel/