linux-kernel - Re: [PATCH v6 1/3] dt-bindings:iio:adc: add generic settling-time-us and oversampling-ratio channel properties

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Message-ID: <20210429042659.rioipw3sqdmtmymy@pengutronix.de>
Date:   Thu, 29 Apr 2021 06:26:59 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     devicetree@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org,
        Robin van der Gracht <robin@...tonic.nl>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        David Jander <david@...tonic.nl>,
        Jonathan Cameron <jic23@...nel.org>
Subject: Re: [PATCH v6 1/3] dt-bindings:iio:adc: add generic settling-time-us
 and oversampling-ratio channel properties

On Wed, Apr 28, 2021 at 05:59:31PM +0100, Jonathan Cameron wrote:
> On Wed, 28 Apr 2021 09:32:06 +0200
> Oleksij Rempel <o.rempel@...gutronix.de> wrote:
> 
> > Settling time and over sampling is a typical challenge for different IIO ADC
> > devices. So, introduce channel specific settling-time-us and oversampling-ratio
> > properties to cover this use case.
> > 
> > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> This and patch 2 both look good to me.  Given Rob gave a minor comment on the
> previous version I don't feel I need him to look at this again.
> 
> Will pick up in a few days if no other reviews come in to require a v7.

Ok, thank you!


> Thanks,
> 
> Jonathan
> 
> > ---
> >  Documentation/devicetree/bindings/iio/adc/adc.yaml | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> > index 912a7635edc4..db348fcbb52c 100644
> > --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml
> > +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> > @@ -39,4 +39,16 @@ properties:
> >        The first value specifies the positive input pin, the second
> >        specifies the negative input pin.
> >  
> > +  settling-time-us:
> > +    description:
> > +      Time between enabling the channel and first stable readings.
> > +
> > +  oversampling-ratio:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description:
> > +      Oversampling is used as replacement of or addition to the low-pass filter.
> > +      In some cases, the desired filtering characteristics are a function the
> > +      device design and can interact with other characteristics such as
> > +      settling time.
> > +
> >  additionalProperties: true
> 
> 
> 

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