Re: [PATCH v2 2/4] dt-bindings: auxdisplay: Add bindings for generic 7 segment LED

Geert Uytterhoeven
2024-02-29T09:23:30Z

Hi Andy,

On Wed, Feb 28, 2024 at 3:58 PM Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Wed, Feb 28, 2024 at 4:04 PM Rob Herring <robh@kernel.org> wrote:
> > On Wed, Feb 28, 2024 at 10:22:42AM +1300, Chris Packham wrote:
>
> ...
>
> > > + segment-gpios:
> > > + description:
> > > + An array of GPIOs one per segment.
> > > + minItems: 7
> >
> > How does one know which GPIO is which segment?
>
> I believe we need just to agree on this. Since anybody can shuffle
> GPIOs in the DT, there is no need to support arbitrary orders. And
> naturally 'a' is bit 0, 'g' is bit 6, 'dp' bit 7 if present.

Note that there are no bits involved at this level, only GPIO specifiers.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds