Re: [PATCH v3 2/2] dt-bindings: hwmon: add renesas,isl28022

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On Tue, Aug 01, 2023 at 06:35:46PM +0200, Carsten Spieß wrote:
> Add dt-bindings for Renesas ISL28022 power monitor.
> 
> Signed-off-by: Carsten Spieß <mail@xxxxxxxxxxxxxxxxx>
> ---
> v3:
> - changelog added
> v2/v3:
> - schema errors fixed
> - properties reworked
> - shunt-resistor minimum and default value added
> ---
>  .../bindings/hwmon/renesas,isl28022.yaml      | 65 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 66 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml b/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> new file mode 100644
> index 000000000000..1e0971287941
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/renesas,isl28022.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas ISL28022 power monitor
> +
> +maintainers:
> +  - Carsten Spieß <mail@xxxxxxxxxxxxxxxxx>
> +
> +description: |
> +  The ISL28022 is a power monitor with I2C interface. The device monitors
> +  voltage, current via shunt resistor and calculated power.
> +
> +  Datasheets:
> +    https://www.renesas.com/us/en/www/doc/datasheet/isl28022.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - renesas,isl28022

You've only got one compatible, why the enum? Will there be more similar
devices that have an incompatible programming model?

> +
> +  reg:
> +    maxItems: 1
> +
> +  shunt-resistor-micro-ohms:
> +    description: |
> +      Shunt resistor value in micro-Ohm
> +    minimum: 800
> +    default: 10000
> +
> +  renesas,shunt-range-microvolt:
> +    description: |

You don't need these |s if you have no formatting to preserve in the
text.
Otherwise, this does look good to me.

Cheers,
Conor.

> +      Maximal shunt voltage range of +/- 40 mV, 80 mV, 160 mV or 320 mV
> +    default: 320000
> +    enum: [40000, 80000, 160000, 320000]
> +
> +  renesas,average-samples:
> +    description: |
> +      Number of samples to be used to report voltage, current and power values.
> +    default: 1
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    enum: [1, 2, 4, 8, 16, 32, 64, 128]
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        power-monitor@40 {
> +            compatible = "renesas,isl28022";
> +            reg = <0x40>;
> +            shunt-resistor-micro-ohms = <8000>;
> +            renesas,shunt-range-microvolt = <40000>;
> +            renesas,average-samples = <128>;
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b02e3b991676..23b8e8183ece 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -11069,6 +11069,7 @@ ISL28022 HARDWARE MONITORING DRIVER
>  M:	Carsten Spieß <mail@xxxxxxxxxxxxxxxxx>
>  L:	linux-hwmon@xxxxxxxxxxxxxxx
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/hwmon/renesas,isl28022.yaml
>  F:	Documentation/hwmon/isl28022.rst
>  F:	drivers/hwmon/isl28022.c
>  
> -- 
> 2.34.1
> 

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