linux-kernel - RE: [PATCH v4 4/5] dt-bindings: iio: dac: Add adi,ltc2672.yaml

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Date: Mon, 24 Jun 2024 15:26:26 +0000
From: "Paller, Kim Seer" <KimSeer.Paller@...log.com>
To: Jonathan Cameron <jic23@...nel.org>, Conor Dooley <conor@...nel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        David Lechner
	<dlechner@...libre.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Liam Girdwood
	<lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Dimitri Fedrau
	<dima.fedrau@...il.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob
 Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
        "Hennerich,
 Michael" <Michael.Hennerich@...log.com>,
        Nuno Sá
	<noname.nuno@...il.com>
Subject: RE: [PATCH v4 4/5] dt-bindings: iio: dac: Add adi,ltc2672.yaml



> -----Original Message-----
> From: Jonathan Cameron <jic23@...nel.org>
> Sent: Sunday, June 23, 2024 9:44 PM
> To: Conor Dooley <conor@...nel.org>
> Cc: Paller, Kim Seer <KimSeer.Paller@...log.com>; linux-
> kernel@...r.kernel.org; linux-iio@...r.kernel.org; devicetree@...r.kernel.org;
> David Lechner <dlechner@...libre.com>; Lars-Peter Clausen
> <lars@...afoo.de>; Liam Girdwood <lgirdwood@...il.com>; Mark Brown
> <broonie@...nel.org>; Dimitri Fedrau <dima.fedrau@...il.com>; Krzysztof
> Kozlowski <krzk+dt@...nel.org>; Rob Herring <robh@...nel.org>; Conor
> Dooley <conor+dt@...nel.org>; Hennerich, Michael
> <Michael.Hennerich@...log.com>; Nuno Sá <noname.nuno@...il.com>
> Subject: Re: [PATCH v4 4/5] dt-bindings: iio: dac: Add adi,ltc2672.yaml
> 
> [External]
> 
> On Wed, 19 Jun 2024 18:57:59 +0100
> Conor Dooley <conor@...nel.org> wrote:
> 
> > On Wed, Jun 19, 2024 at 02:49:03PM +0800, Kim Seer Paller wrote:
> > > +patternProperties:
> > > +  "^channel@[0-4]$":
> > > +    type: object
> > > +    additionalProperties: false
> > > +
> > > +    properties:
> > > +      reg:
> > > +        description: The channel number representing the DAC output
> channel.
> > > +        maximum: 4
> > > +
> > > +      adi,toggle-mode:
> > > +        description:
> > > +          Set the channel as a toggle enabled channel. Toggle operation
> enables
> > > +          fast switching of a DAC output between two different DAC codes
> without
> > > +          any SPI transaction.
> > > +        type: boolean
> > > +
> > > +      adi,output-range-microamp:
> > > +        description: Specify the channel output full scale range.
> > > +        enum: [3125000, 6250000, 12500000, 25000000, 50000000,
> 100000000,
> > > +               200000000, 300000000]
> >
> > IIO folks, is this sort of thing common/likely to exist on other DACs?
> 
> Fair point. It is probably time to conclude this is at least moderately common
> and generalize it - which will need a dac.yaml similar to the one we have for
> ADCs in adc/adc.yaml.  That will need to make this a per channel node property
> (same as the adc ones).

Should I proceed with generalizing common DAC properties in this series and does
this mean somehow removing these common properties from existing DAC bindings?

> 
> I'd also expect it to always take 2 values. In many cases the first will be 0 but
> that is fine.
> 
> Jonathan