linux-kernel - Re: [PATCH 1/2] dt-bindings: iio: accel: Add binding documentation for ADXL313

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Date:   Mon, 2 Aug 2021 13:49:21 -0300
From:   Lucas Stankus <lucas.p.stankus@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        robh+dt@...nel.org, "Bogdan, Dragos" <Dragos.Bogdan@...log.com>,
        "Berghe, Darius" <Darius.Berghe@...log.com>,
        linux-iio <linux-iio@...r.kernel.org>,
        devicetree@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: iio: accel: Add binding documentation
 for ADXL313

On Sun, Aug 1, 2021 at 3:01 PM Jonathan Cameron <jic23@...nel.org> wrote:
>
> On Sat, 31 Jul 2021 17:36:31 -0300
> Lucas Stankus <lucas.p.stankus@...il.com> wrote:
>
> > Add device tree binding documentation for ADXL313 3-axis accelerometer.
> >
> > Signed-off-by: Lucas Stankus <lucas.p.stankus@...il.com>
>
> Hi Lucas,
>
> A few minor requests for additions inline, so we include everything
> that is likely to be used by the driver in the longer term.
>
> > ---
> >  .../bindings/iio/accel/adi,adxl313.yaml       | 75 +++++++++++++++++++
> >  1 file changed, 75 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml b/Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml
> > new file mode 100644
> > index 000000000000..31f11d7eaaae
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/accel/adi,adxl313.yaml
> > @@ -0,0 +1,75 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/accel/adi,adxl313.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Analog Devices ADXL313 3-Axis Digital Accelerometer
> > +
> > +maintainers:
> > +  - Lucas Stankus <lucas.p.stankus@...il.com>
> > +
> > +description: |
> > +  Analog Devices ADXL313 3-Axis Digital Accelerometer that supports
> > +  both I2C & SPI interfaces.
> > +    https://www.analog.com/en/products/adxl313.html
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - adi,adxl313
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  spi-3wire: true
> > +
> > +  spi-cpha: true
> > +
> > +  spi-cpol: true
> > +
> > +  spi-max-frequency: true
> > +
> > +  interrupts:
> > +    maxItems: 2
>
> As board designers have an annoying habit of wiring up the second
> interrupt only, please also provide interrupt-names so we can
> know which one is connected if it's only one.
>
> From a quick glance at the datasheet, I see this also has two powersupplies.
> Please include
> vddio-supply
> vs-supply - annoyingly the s just stands for supply, but v-supply seems a bit to minimal.
>

Thanks for the feedback, I'll change it for the v2!

> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    i2c0 {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        /* Example for a I2C device node */
> > +        accelerometer@53 {
> > +            compatible = "adi,adxl313";
> > +            reg = <0x53>;
> > +            interrupt-parent = <&gpio0>;
> > +            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> > +        };
> > +    };
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    spi {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        /* Example for a SPI device node */
> > +        accelerometer@0 {
> > +            compatible = "adi,adxl313";
> > +            reg = <0>;
> > +            spi-max-frequency = <5000000>;
> > +            spi-cpol;
> > +            spi-cpha;
> > +            interrupt-parent = <&gpio0>;
> > +            interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> > +        };
> > +    };
>