linux-kernel - Re: [PATCH v2 2/4] dt-bindings: iio: imu: bmi160: add regulators and mount-matrix

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Message-ID: <20200520071133.GC3361@ict14-OptiPlex-980>
Date:   Wed, 20 May 2020 09:11:33 +0200
From:   Jonathan Albrieux <jonathan.albrieux@...il.com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc:     linux-kernel@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        "open list:IIO SUBSYSTEM AND DRIVERS" <linux-iio@...r.kernel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v2 2/4] dt-bindings: iio: imu: bmi160: add regulators and
 mount-matrix

On Tue, May 19, 2020 at 06:51:59PM +0100, Jonathan Cameron wrote:
> On Tue, 19 May 2020 09:50:58 +0200
> Jonathan Albrieux <jonathan.albrieux@...il.com> wrote:
> 
> > Add vdd-supply and vddio-supply support.
> > Add mount-matrix support.
> > 
> > Signed-off-by: Jonathan Albrieux <jonathan.albrieux@...il.com>
> 
> A few minor comments inline.
> 
> > ---
> >  .../devicetree/bindings/iio/imu/bmi160.yaml   | 21 +++++++++++++++++++
> >  1 file changed, 21 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/imu/bmi160.yaml b/Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > index 6b464ce5ed0b..5b13af7a209f 100644
> > --- a/Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > +++ b/Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > @@ -46,6 +46,21 @@ properties:
> >        set if the specified interrupt pin should be configured as
> >        open drain. If not set, defaults to push-pull.
> >  
> > +  vdd-supply:
> > +    maxItems: 1
> > +    description: |
> > +      an optional regulator that needs to be on to provide VDD power to
> > +      the sensor.
> 
> They aren't optional.  Whether we specify them or rely on stub regulators
> being provided because they aren't controllable is the optional bit.
> That's clearly defined by them not being in the required list below.
> So say something li.e
> 
>    description: |
>       provide VDD power to the sensor.
>

Oh ok thank you, will work on that

> > +
> > +  vddio-supply:
> > +    maxItems: 1
> > +    description: |
> > +      an optional regulator that needs to be on to provide the VDD IO power to
> > +      the sensor.
> > +
> > +  mount-matrix:
> > +    description: an optional 3x3 mounting rotation matrix
> > +
> >  required:
> >    - compatible
> >    - reg
> > @@ -61,9 +76,15 @@ examples:
> >          bmi160@68 {
> >                  compatible = "bosch,bmi160";
> >                  reg = <0x68>;
> > +                vdd-supply = <&pm8916_l17>;
> > +                vddio-supply = <&pm8916_l6>;
> >                  interrupt-parent = <&gpio4>;
> >                  interrupts = <12 1>;
> >                  interrupt-names = "INT1";
> > +                mount-matrix = "0", "1", "0",
> > +                               "-1", "0", "0",
> > +                               "0", "0", "1";
> > +                };
> >          };
> >    - |
> >      // Example for SPI
> 
>