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Date:   Wed, 20 May 2020 09:24:23 +0200
From:   Jonathan Albrieux <jonathan.albrieux@gmail.com>
To:     Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc:     linux-kernel@vger.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        "open list:IIO SUBSYSTEM AND DRIVERS" <linux-iio@vger.kernel.org>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
        Jonathan Cameron <jic23@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Daniel Baluta <daniel.baluta@nxp.com>
Subject: Re: [PATCH v2 1/4] dt-bindings: iio: imu: bmi160: convert txt format
 to yaml
Message-ID: <20200520072423.GF3361@ict14-OptiPlex-980>
References: <20200519075111.6356-1-jonathan.albrieux@gmail.com>
 <20200519075111.6356-2-jonathan.albrieux@gmail.com>
 <20200519184933.00003f00@Huawei.com>
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On Tue, May 19, 2020 at 06:49:33PM +0100, Jonathan Cameron wrote:
> On Tue, 19 May 2020 09:50:57 +0200
> Jonathan Albrieux <jonathan.albrieux@gmail.com> wrote:
> 
> > Converts documentation from txt format to yaml 
> > 
> > Signed-off-by: Jonathan Albrieux <jonathan.albrieux@gmail.com>
> > ---
> >  .../devicetree/bindings/iio/imu/bmi160.txt    | 37 --------
> >  .../devicetree/bindings/iio/imu/bmi160.yaml   | 84 +++++++++++++++++++
> >  2 files changed, 84 insertions(+), 37 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/iio/imu/bmi160.txt
> >  create mode 100644 Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/imu/bmi160.txt b/Documentation/devicetree/bindings/iio/imu/bmi160.txt
> > deleted file mode 100644
> > index 900c169de00f..000000000000
> > --- a/Documentation/devicetree/bindings/iio/imu/bmi160.txt
> > +++ /dev/null
> > @@ -1,37 +0,0 @@
> > -Bosch BMI160 - Inertial Measurement Unit with Accelerometer, Gyroscope
> > -and externally connectable Magnetometer
> > -
> > -https://www.bosch-sensortec.com/bst/products/all_products/bmi160
> > -
> > -Required properties:
> > - - compatible : should be "bosch,bmi160"
> > - - reg : the I2C address or SPI chip select number of the sensor
> > - - spi-max-frequency : set maximum clock frequency (only for SPI)
> > -
> > -Optional properties:
> > - - interrupts : interrupt mapping for IRQ
> > - - interrupt-names : set to "INT1" if INT1 pin should be used as interrupt
> > -   input, set to "INT2" if INT2 pin should be used instead
> > - - drive-open-drain : set if the specified interrupt pin should be configured as
> > -   open drain. If not set, defaults to push-pull.
> > -
> > -Examples:
> > -
> > -bmi160@68 {
> > -	compatible = "bosch,bmi160";
> > -	reg = <0x68>;
> > -
> > -	interrupt-parent = <&gpio4>;
> > -	interrupts = <12 IRQ_TYPE_EDGE_RISING>;
> > -	interrupt-names = "INT1";
> > -};
> > -
> > -bmi160@0 {
> > -	compatible = "bosch,bmi160";
> > -	reg = <0>;
> > -	spi-max-frequency = <10000000>;
> > -
> > -	interrupt-parent = <&gpio2>;
> > -	interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
> > -	interrupt-names = "INT2";
> > -};
> > diff --git a/Documentation/devicetree/bindings/iio/imu/bmi160.yaml b/Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > new file mode 100644
> > index 000000000000..6b464ce5ed0b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/imu/bmi160.yaml
> > @@ -0,0 +1,84 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/imu/bmi160.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Bosch BMI160
> > +
> > +maintainers:
> > +  - can't find a mantainer, author is Daniel Baluta <daniel.baluta@intel.com>
> 
> Daniel is still active in the kernel, just not at Intel any more. +CC
> 

Oh ok thank you! Daniel are you still maintaining this driver?

> > +
> > +description: |
> > +  Inertial Measurement Unit with Accelerometer, Gyroscope and externally
> > +  connectable Magnetometer
> > +  https://www.bosch-sensortec.com/bst/products/all_products/bmi160
> > +
> > +properties:
> > +  compatible:
> > +    const: bosch,bmi160
> > +
> > +  reg:
> > +    maxItems: 1
> > +    description: the I2C address or SPI chip select number of the sensor
> 
> As standard for i2c and spi, usually no need to have a description line for
> this element.
> 

Thank you, will remove the description then.

> > +
> > +  spi-max-frequency:
> > +    maxItems: 1
> > +    description: set maximum clock frequency (required only for SPI)
> 
> Standard spi binding.  Probably doesn't need to be included here.
> 

So should I completely remove it from properties?

> > +
> > +  interrupts:
> > +    maxItems: 1
> > +    description: interrupt mapping for IRQ
> > +
> > +  interrupt-names:
> > +    minItems: 1
> > +    maxItems: 1
> > +    items:
> > +      enum:
> > +        - INT1
> > +        - INT2
> > +    description: |
> > +      set to "INT1" if INT1 pin should be used as interrupt input, set
> > +      to "INT2" if INT2 pin should be used instead
> > +
> > +  drive-open-drain:
> > +    description: |
> > +      set if the specified interrupt pin should be configured as
> > +      open drain. If not set, defaults to push-pull.
> 
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +examples:
> > +  - |
> > +    // Example for I2C
> > +    i2c@78b7000 {
> > +        reg = <0x78b6000 0x600>;
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> 
> Take a look at some of the other binding examples.  We normally
> just focus on the driver so don't supply details for the bus.
> 
> e.g. https://elixir.bootlin.com/linux/v5.7-rc6/source/Documentation/devicetree/bindings/iio/adc/maxim,max1363.yaml#L39
> 

Will check :-)

> > +
> > +        bmi160@68 {
> > +                compatible = "bosch,bmi160";
> > +                reg = <0x68>;
> > +                interrupt-parent = <&gpio4>;
> > +                interrupts = <12 1>;
> > +                interrupt-names = "INT1";
> > +        };
> > +  - |
> > +    // Example for SPI
> > +    spi@78b7000 {
> > +        reg = <0x78b7000 0x600>,
> > +              <0x7884000 0x23000>;
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        bmi160@0 {
> > +                compatible = "bosch,bmi160";
> > +                reg = <0>;
> > +                spi-max-frequency = <10000000>;
> > +                interrupt-parent = <&gpio2>;
> > +                interrupts = <12 1>;
> > +                interrupt-names = "INT2";
> > +        };
> > +    };
> 
> 

Thank you,

Best regards,
Jonathan Albrieux