linux-kernel - Re: [PATCH v2] dt-bindings: iio: accel: Add bmi088 accelerometer bindings

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Message-ID: <20200328151928.12f5517e@archlinux>
Date:   Sat, 28 Mar 2020 15:19:28 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Mike Looijmans <mike.looijmans@...ic.nl>
Cc:     devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, knaack.h@....de, lars@...afoo.de,
        pmeerw@...erw.net, robh+dt@...nel.org, mark.rutland@....com
Subject: Re: [PATCH v2] dt-bindings: iio: accel: Add bmi088 accelerometer
 bindings

On Mon, 23 Mar 2020 10:55:51 +0100
Mike Looijmans <mike.looijmans@...ic.nl> wrote:

> This adds the device-tree bindings for the Bosch Sensortec BMI088 IMU,
> the accelerometer part.
> 
> Signed-off-by: Mike Looijmans <mike.looijmans@...ic.nl>
Hi Mike

The binding should look to be as complete as possible, independent on what
we are actually using in the driver.

A quick glance at the datasheet shows me this device has 2 interrupt lines
dedicated to the accelerometer and 2 power supplies, vddio and vdd.

Interrupt lines for flexible parts like this are fiddly to do, so take
a look at how we do this in other drivers.  Hmm. the interrupt line to set
a tag is 'interesting'.  I'd ignore that for now...

> ---
> v2: convert to yaml format
> 
>  .../bindings/iio/accel/bosch,bmi088.yaml      | 38 +++++++++++++++++++
>  1 file changed, 38 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
> new file mode 100644
> index 000000000000..715f79c3b2a9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/accel/bosch,bmi088.yaml
> @@ -0,0 +1,38 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/accel/bosch,bma400.yaml#

Should reflect the compatible so include the accel part.

> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bosch BMI088 IMU accelerometer part
> +
> +maintainers:
> +  - Mike Looijmans <mike.looijmans@...ic.nl>
> +
> +description: |
> +  Acceleration part of the IMU sensor with an SPI interface
> +
> +  Specifications about the sensor can be found at:
> +    https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - bosch,bmi088_accel
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +  spi {
> +    bmi088_accel@1 {
> +      compatible = "bosch,bmi088_accel";
> +      reg = <1>;
> +      spi-max-frequency = <10000000>;
> +    };
> +  };