linux-kernel - Re: [PATCH 1/5] media: dt-bindings: i2c: add DW9719/DW9718S VCM binding

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Message-ID: <a64eddca62e9ab72eefe2bf347f4633550965433.camel@apitzsch.eu>
Date: Wed, 02 Jul 2025 22:31:51 +0200
From: André Apitzsch <git@...tzsch.eu>
To: Krzysztof Kozlowski <krzk@...nel.org>, Sakari Ailus
	 <sakari.ailus@...ux.intel.com>
Cc: Val Packett <val@...kett.cool>, Daniel Scally <djrscally@...il.com>, 
 Mauro Carvalho Chehab
	 <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
	 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-media@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] media: dt-bindings: i2c: add DW9719/DW9718S VCM
 binding

Hi Krzysztof, hi Sakari,

Am Montag, dem 10.02.2025 um 12:04 +0100 schrieb Krzysztof Kozlowski:
> On 10/02/2025 11:36, Sakari Ailus wrote:
> > Hi Krzysztof,
> > 
> > On Mon, Feb 10, 2025 at 09:29:25AM +0100, Krzysztof Kozlowski
> > wrote:
> > > > +  dongwoon,vcm-freq:
> > > > +    description:
> > > > +      The switching frequency for the voice coil motor.
> > > 
> > > Frequency is in Hertz, so use proper property unit suffix. BTW,
> > > you cannot add incorrect properties post-factum based on already
> > > accepted ACPI driver. This would be nice bypass of review, right?
> > 
> > What's actually configured here is the divisor (10 MHz clock,
> > divisor seems to be value + 2). It's similar to existing
> > Documentation/devicetree/bindings/media/i2c/dongwoon,dw9768.yaml .
> > I prefer this as it's much easier to use that in a driver (think of
> > having values like 1428571 in DT, too).
> 
> 
> Sure, but then this should be renamed to match purpose and
> description rephrased.
> 

What would be a better name for the property?

Best regards,
André

> > 
> > > 
> > > > +    $ref: /schemas/types.yaml#/definitions/uint32
> 
> 
> And this would stay + constraints.
> 
> 
> Best regards,
> Krzysztof