linux-kernel - Re: [PATCH v13 1/3] dt-bindings: adc: add AD7173

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Message-ID: <20240221-grief-situated-575ce257f6ff@spud>
Date: Wed, 21 Feb 2024 20:00:40 +0000
From: Conor Dooley <conor@...nel.org>
To: Ceclan Dumitru <mitrutzceclan@...il.com>
Cc: David Lechner <dlechner@...libre.com>, linus.walleij@...aro.org,
	brgl@...ev.pl, andy@...nel.org, linux-gpio@...r.kernel.org,
	Lars-Peter Clausen <lars@...afoo.de>,
	Jonathan Cameron <jic23@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Michael Walle <michael@...le.cc>,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	Arnd Bergmann <arnd@...db.de>, ChiaEn Wu <chiaen_wu@...htek.com>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Leonard Göhrs <l.goehrs@...gutronix.de>,
	Mike Looijmans <mike.looijmans@...ic.nl>,
	Haibo Chen <haibo.chen@....com>,
	Hugo Villeneuve <hvilleneuve@...onoff.com>,
	Ceclan Dumitru <dumitru.ceclan@...log.com>,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v13 1/3] dt-bindings: adc: add AD7173


> >> +
> >> +      diff-channels:
> >> +        items:
> >> +          minimum: 0
> >> +          maximum: 31
> >> +
> > 
> > Are we missing `bipolar: true` here? (since we have
> > unevaluatedProperties: false)
> > 
> 
> No, since we are referencing the adc schema "$ref: adc.yaml"
> Which contains:
> """
>   bipolar:
> 
>     $ref: /schemas/types.yaml#/definitions/flag
> 
>     description: If provided, the channel is to be used in bipolar mode.
> """

FWIW, the difference here is whether or not the binding for the device
contains "additionalProperties: false" or "unevaluatedProperties: false".
The former requires "bipolar: true", the latter does not.

Cheers,
Conor.

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