Re: [PATCH v2] gpiolib: Disallow identical line names in the same chip

[Andy Shevchenko <andy.shevchenko@xxxxxxxxx>]

On Fri, Jan 8, 2021 at 12:40 PM Flavio Suligoi <f.suligoi@xxxxxxx> wrote:
>
> Hi Andy,
>
> > Flavio, perhaps one more rule to the gpio-line-names property has to
> > be added into documentation (Bart, same to DT docs?):
> >  - names inside one chip must be unique
>
> Just a question: why "inside one chip" only?
> The name should be unique for all gpiochips, since "gpiofind"
> stops at the first name match, and doesn't show other gpios
> names, even if they exist, with the same name, in other gpiochip.
>
> I think that a rule as:
>
> - names must be unique (avoid duplicates in any gpiochips)

Definitely "no". Simple case: you have 2+ chips of the same
functionality. You want to use PinX of each of them. You always don't
know ahead of time how many of them you will have at runtime.


-- 
With Best Regards,
Andy Shevchenko