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From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Thu, 29 Feb 2024 10:23:15 +0100
Message-ID: <CAMuHMdWgytkANQ19=pSfG7Jpddo7Htgp2P=p7EAVmpWYuGPmCg@mail.gmail.com>
Subject: Re: [PATCH v2 2/4] dt-bindings: auxdisplay: Add bindings for generic
 7 segment LED
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Rob Herring <robh@kernel.org>, Chris Packham <chris.packham@alliedtelesis.co.nz>, andy@kernel.org, 
	krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, andrew@lunn.ch, 
	gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com, 
	ojeda@kernel.org, tzimmermann@suse.de, javierm@redhat.com, robin@protonic.nl, 
	lee@kernel.org, pavel@ucw.cz, devicetree@vger.kernel.org, 
	linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org
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Hi Andy,

On Wed, Feb 28, 2024 at 3:58=E2=80=AFPM Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Wed, Feb 28, 2024 at 4:04=E2=80=AFPM Rob Herring <robh@kernel.org> wro=
te:
> > 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

--=20
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k=
org

In personal conversations with technical people, I call myself a hacker. Bu=
t
when I'm talking to journalists I just say "programmer" or something like t=
hat.
                                -- Linus Torvalds