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

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Message-ID: <87zfmzakdc.fsf@justinweiss.com>
Date: Sat, 19 Oct 2024 13:49:35 -0700
From: Justin Weiss <justin@...tinweiss.com>
To: Jonathan Cameron <jic23@...nel.org>
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

Jonathan Cameron <jic23@...nel.org> writes:

> 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

Sounds good, will update in v3.

Justin

>> ---
>>  .../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/
>>