Re: [PATCH v2 7/9] gpio: mockup: pass the chip label as device property

[Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>]

On Mon, Sep 28, 2020 at 3:00 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> On Mon, Sep 28, 2020 at 12:41:53PM +0200, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> >
> > While we do check the "chip-name" property in probe(), we never actually
> > use it. Let's pass the chip label to the driver using device properties
> > as we'll want to allow users to define their own once dynamically
> > created chips are supported.
> >
> > The property is renamed to "chip-label" to not cause any confusion with
> > the actual chip name which is of the form: "gpiochipX".
> >

^^^ here, see below

> > If the "chip-label" property is missing, let's do what most devices in
> > drivers/gpio/ do and use dev_name().
>
> ...
>
> > +             snprintf(chip_label, sizeof(chip_label),
> > +                      "gpio-mockup-%c", i + 'A');
> > +             properties[prop++] = PROPERTY_ENTRY_STRING("chip-label",
> > +                                                        chip_label);
>
> You added new property, now count is up to 4. But at the same time
>
>         #define GPIO_MOCKUP_MAX_PROP  4
>
> how do you avoid overflow?
>

I renamed the property, the previous "chip-name" is no longer used. In
fact it was never used but was accounted for in GPIO_MOCKUP_MAX_PROP.

Bart