linux-kernel - Re: [PATCH 1/2] dt-bindings: iio: proximity: Add bindings for Murata IRS-D200

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Date:   Sat, 17 Jun 2023 10:55:38 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Waqar Hameed <waqar.hameed@...s.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...s.com
Subject: Re: [PATCH 1/2] dt-bindings: iio: proximity: Add bindings for Murata
 IRS-D200

On 16/06/2023 17:10, Waqar Hameed wrote:
> Murata IRS-D200 is a PIR sensor for human detection. It uses the I2C bus
> for communication with interrupt support. Add devicetree bindings
> requiring the compatible string, I2C slave address (reg) and interrupts.

Thank you for your patch. There is something to discuss/improve. I have
actually only remark about DTS example, but since I expect resend two
more nits as well.


A nit, subject: drop second/last, redundant "bindings for". The
"dt-bindings" prefix is already stating that these are bindings.

> 
> Signed-off-by: Waqar Hameed <waqar.hameed@...s.com>
> ---
>  .../iio/proximity/murata,irsd200.yaml         | 54 +++++++++++++++++++
>  1 file changed, 54 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/proximity/murata,irsd200.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/proximity/murata,irsd200.yaml b/Documentation/devicetree/bindings/iio/proximity/murata,irsd200.yaml
> new file mode 100644
> index 000000000000..d317fbe7bd50
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/proximity/murata,irsd200.yaml
> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/proximity/murata,irsd200.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Murata IRS-D200 PIR sensor
> +
> +maintainers:
> +  - Waqar Hameed <waqar.hameed@...s.com>
> +
> +description: |

Nit, do not need '|' unless you need to preserve formatting.

> +  PIR sensor for human detection.
> +
> +properties:
> +  compatible:
> +    const: murata,irsd200
> +
> +  reg:
> +    items:
> +      - enum:
> +          - 0x48
> +          - 0x49
> +        description: |
> +          When the AD pin is connected to GND, the slave address is 0x48.
> +          When the AD pin is connected to VDD, the slave address is 0x49.
> +
> +  interrupts:
> +    maxItems: 1
> +    description:
> +      Type should be IRQ_TYPE_EDGE_RISING.
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        pir@48 {

Node names should be generic. See also explanation and list of examples
in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation

so I guess: proximity@?


Best regards,
Krzysztof