linux-kernel - Re: [PATCH v1 1/2] dt-bindings: iio: adc: Add binding for Nuvoton NCT720x ADCs

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Message-ID: <CA+4VgcJ9TgDAK6Q0RqBWhiT115nPGHNesYGKKpQyBCgC=rx+BQ@mail.gmail.com>
Date: Thu, 7 Nov 2024 08:59:44 +0800
From: Yu-Hsian Yang <j2anfernee@...il.com>
To: Conor Dooley <conor@...nel.org>
Cc: Chanh Nguyen <chanh@...eremail.onmicrosoft.com>, avifishman70@...il.com, 
	tmaimon77@...il.com, tali.perry1@...il.com, venture@...gle.com, 
	yuenn@...gle.com, benjaminfair@...gle.com, jic23@...nel.org, lars@...afoo.de, 
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, nuno.sa@...log.com, 
	dlechner@...libre.com, javier.carrasco.cruz@...il.com, andy@...nel.org, 
	marcelo.schmitt@...log.com, olivier.moysan@...s.st.com, 
	mitrutzceclan@...il.com, matteomartelli3@...il.com, alisadariana@...il.com, 
	joao.goncalves@...adex.com, marius.cristea@...rochip.com, 
	mike.looijmans@...ic.nl, chanh@...amperecomputing.com, KWLIU@...oton.com, 
	yhyang2@...oton.com, openbmc@...ts.ozlabs.org, linux-iio@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] dt-bindings: iio: adc: Add binding for Nuvoton
 NCT720x ADCs

Dear Conor Dooley,

Thank you for your response.

NCT7201 supports 8 voltage monitor inputs while NCT7202 supports 12
voltage monitor inputs.
NCT7201 and NCT7202 provide SMBus to access the internal register, and
support SMBus byte write and byte/word read protocols.

Conor Dooley <conor@...nel.org> 於 2024年11月7日 週四 上午12:13寫道：
>
> On Wed, Nov 06, 2024 at 11:58:06AM +0700, Chanh Nguyen wrote:
> >
> >
> > On 06/11/2024 09:39, Eason Yang wrote:
> > > This adds a binding specification for the Nuvoton NCT7201/NCT7202
> > > family of ADCs.
> > >
> > > Signed-off-by: Eason Yang <j2anfernee@...il.com>
> > > ---
> > >   .../bindings/iio/adc/nuvoton,nct720x.yaml     | 47 +++++++++++++++++++
> > >   MAINTAINERS                                   |  1 +
> > >   2 files changed, 48 insertions(+)
> > >   create mode 100644 Documentation/devicetree/bindings/iio/adc/nuvoton,nct720x.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/iio/adc/nuvoton,nct720x.yaml b/Documentation/devicetree/bindings/iio/adc/nuvoton,nct720x.yaml
> > > new file mode 100644
> > > index 000000000000..3052039af10e
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/iio/adc/nuvoton,nct720x.yaml
> > > @@ -0,0 +1,47 @@
> > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/iio/adc/nuvoton,nct720x.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Nuvoton nct7202 and similar ADCs
> > > +
> > > +maintainers:
> > > +  - Eason Yang <yhyang2@...oton.com>
> > > +
> > > +description: |
> > > +   Family of ADCs with i2c interface.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    enum:
> > > +      - nuvoton,nct7201
> > > +      - nuvoton,nct7202
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  read-vin-data-size:
> >
> > Is it generic property or vendor property? I tried to find in the
> > https://github.com/torvalds/linux/tree/master/Documentation/devicetree/bindings
> > , but it seems this property hasn't been used on other devices.
> >
> > If it is vendor property, then I think it should include a vendor prefix.
> > For examples:
> >
> > https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/iio/adc/adi%2Cad7780.yaml#L50
> > https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/iio/adc/fsl%2Cvf610-adc.yaml#L42
> > https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/iio/adc/st%2Cstmpe-adc.yaml#L22
>
> An explanation of why it cannot be determined from the compatible would
> also be good. Two compatibles and two values makes me a little
> suspicious!