linux-kernel - Re: [PATCH v2 3/6] dt-bindings: iio: imu: Add Bosch BMI260

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Message-ID: <20241019123623.210ac09d@jic23-huawei>
Date: Sat, 19 Oct 2024 12:36:23 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Justin Weiss <justin@...tinweiss.com>
Cc: Alex Lanzano <lanzano.alex@...il.com>, Lars-Peter Clausen
 <lars@...afoo.de>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, "Derek J . Clark"
 <derekjohn.clark@...il.com>, Philip Müller
 <philm@...jaro.org>
Subject: Re: [PATCH v2 3/6] dt-bindings: iio: imu: Add Bosch BMI260

On Fri, 18 Oct 2024 16:36:09 -0700
Justin Weiss <justin@...tinweiss.com> wrote:

> Add devicetree description document for Bosch BMI260, a 6-Axis IMU.
> 
> Signed-off-by: Justin Weiss <justin@...tinweiss.com>
Looks like this would be much better as an additional compatible id
in the existing bosch,bmi270.yaml binding doc.

From a quick comparison they look nearly identical.
Even if there are small differences the dt binding schema allows
those to be expressed in a single file.

Jonathan

> ---
>  .../bindings/iio/imu/bosch,bmi260.yaml        | 77 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 78 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/imu/bosch,bmi260.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/imu/bosch,bmi260.yaml b/Documentation/devicetree/bindings/iio/imu/bosch,bmi260.yaml
> new file mode 100644
> index 000000000000..6786b5e4d0fa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/imu/bosch,bmi260.yaml
> @@ -0,0 +1,77 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/imu/bosch,bmi260.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Bosch BMI260 6-Axis IMU
> +
> +maintainers:
> +  - Justin Weiss <justin@...tinweiss.com>
> +
> +description: |
> +  BMI260 is a 6-axis inertial measurement unit that can measure acceleration and
> +  angular velocity. The sensor also supports configurable interrupt events such
> +  as motion detection and step counting. The sensor can communicate over
> +  I2C or SPI.
> +  https://www.bosch-sensortec.com/products/motion-sensors/imus/bmi260/
> +
> +properties:
> +  compatible:
> +    const: bosch,bmi260
> +
> +  reg:
> +    maxItems: 1
> +
> +  vdd-supply: true
> +  vddio-supply: true
> +
> +  interrupts:
> +    minItems: 1
> +    maxItems: 2
> +
> +  interrupt-names:
> +    minItems: 1
> +    maxItems: 2
> +    items:
> +      enum:
> +        - INT1
> +        - INT2
> +
> +  drive-open-drain:
> +    description:
> +      set if the specified interrupt pins should be configured as
> +      open drain. If not set, defaults to push-pull.
> +
> +  mount-matrix:
> +    description:
> +      an optional 3x3 mounting rotation matrix.
> +
> +required:
> +  - compatible
> +  - reg
> +  - vdd-supply
> +  - vddio-supply
> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        imu@68 {
> +            compatible = "bosch,bmi260";
> +            reg = <0x68>;
> +            vdd-supply = <&vdd>;
> +            vddio-supply = <&vddio>;
> +            interrupt-parent = <&gpio1>;
> +            interrupts = <16 IRQ_TYPE_EDGE_RISING>;
> +            interrupt-names = "INT1";
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 6011af70c12e..73b6b7721dd8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -4047,6 +4047,7 @@ BOSCH SENSORTEC BMI270 IMU IIO DRIVER
>  M:	Alex Lanzano <lanzano.alex@...il.com>
>  L:	linux-iio@...r.kernel.org
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/iio/imu/bosch,bmi260.yaml
>  F:	Documentation/devicetree/bindings/iio/imu/bosch,bmi270.yaml
>  F:	drivers/iio/imu/bmi270/
>