Re: [PATCH v2] gpio: mockup: Allow probing from device tree

[Bartosz Golaszewski]

On Wed, Oct 28, 2020 at 9:24 PM Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
>
> On Wed, Oct 28, 2020 at 8:41 PM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
> > On Tue, Oct 27, 2020 at 2:54 PM Vincent Whitchurch
> > <vincent.whitchurch@xxxxxxxx> wrote:
>
> ...
>
> > > +#include <linux/of.h>
> >
> > Please keep the includes ordered alphabetically.
>
> Besides the fact that that is a wrong header to be included.
> mod_devicetable.h is the correct one.
> (See also below)
>
> ...
>
> > > +#ifdef CONFIG_OF
> > > +static const struct of_device_id gpio_mockup_of_match[] = {
> > > +       { .compatible = "gpio-mockup", },
> > > +       {},
> > > +};
> > > +MODULE_DEVICE_TABLE(of, gpio_mockup_of_match);
> > > +#endif
> >
> > You don't need this ifdef - of_match_ptr() will evaluate to NULL if
> > CONFIG_OF is disabled and the compiler will optimize this struct out.
>
> It's not so. If you drop ugly ifdeffery (and I vote for that, see also
> above) the of_match_ptr() must be dropped as well.
> Otherwise the compiler will issue the warning. So it is either all or none.
>
> --
> With Best Regards,
> Andy Shevchenko

Makes sense, I'll remove this from my tree for now then. Vincent:
please send another iteration.

Bartosz