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

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Date: Wed, 28 Feb 2024 16:57:42 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Rob Herring <robh@...nel.org>
Cc: Chris Packham <chris.packham@...iedtelesis.co.nz>, andy@...nel.org, 
	geert@...ux-m68k.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	andrew@...n.ch, gregory.clement@...tlin.com, sebastian.hesselbarth@...il.com, 
	ojeda@...nel.org, tzimmermann@...e.de, javierm@...hat.com, robin@...tonic.nl, 
	lee@...nel.org, pavel@....cz, devicetree@...r.kernel.org, 
	linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 2/4] dt-bindings: auxdisplay: Add bindings for generic
 7 segment LED

On Wed, Feb 28, 2024 at 4:04 PM Rob Herring <robh@...nel.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.

-- 
With Best Regards,
Andy Shevchenko