linux-kernel - Re: [PATCH v4 1/2] dt-bindings: hwmon: max20730: adding device tree doc for max20730

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Date:   Tue, 6 Oct 2020 14:55:28 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Chu Lin <linchuyuan@...gle.com>
Cc:     jdelvare@...e.com, robh+dt@...nel.org, linux-hwmon@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] dt-bindings: hwmon: max20730: adding device tree
 doc for max20730

On Sun, Oct 04, 2020 at 03:14:44AM +0000, Chu Lin wrote:
> max20730 Integrated, Step-Down Switching Regulator with PMBus
> 
> Signed-off-by: Chu Lin <linchuyuan@...gle.com>
> Reviewed-by: Rob Herring <robh@...nel.org>

Applied to hwmon-next.

Thanks,
Guenter

> ---
> ChangeLog v1 -> v2
>   hwmon: pmbus: max20730:
>   - Don't do anything to the ret if an error is returned from pmbus_read_word
>   - avoid overflow when doing multiplication
> 
> ChangeLog v2 -> v3
>   dt-bindings: hwmon: max20730:
>   - Provide the binding documentation in yaml format
>   hwmon: pmbus: max20730:
>   - No change
> 
> ChangeLog v3 -> v4
>   dt-bindings: hwmon: max20730:
>   - Fix highefficiency to high efficiency in description
>   - Fix presents to present in vout-voltage-divider
>   - Add additionalProperties: false
>   hwmon: pmbus: max20730:
>   - No change
> 
>  .../bindings/hwmon/maxim,max20730.yaml        | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max20730.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max20730.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max20730.yaml
> new file mode 100644
> index 000000000000..93e86e3b4602
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/maxim,max20730.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +
> +$id: http://devicetree.org/schemas/hwmon/maxim,max20730.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim max20730
> +
> +maintainers:
> +  - Jean Delvare <jdelvare@...e.com>
> +  - Guenter Roeck <linux@...ck-us.net>
> +
> +description: |
> +  The MAX20730 is a fully integrated, highly efficient switching regulator
> +  with PMBus for applications operating from 4.5V to 16V and requiring
> +  up to 25A (max) load. This single-chip regulator provides extremely
> +  compact, high efficiency power-delivery solutions with high-precision
> +  output voltages and excellent transient response.
> +
> +  Datasheets:
> +    https://datasheets.maximintegrated.com/en/ds/MAX20730.pdf
> +    https://datasheets.maximintegrated.com/en/ds/MAX20734.pdf
> +    https://datasheets.maximintegrated.com/en/ds/MAX20743.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - maxim,max20730
> +      - maxim,max20734
> +      - maxim,max20743
> +
> +  reg:
> +    maxItems: 1
> +
> +  vout-voltage-divider:
> +    description: |
> +      If voltage divider present at vout, the voltage at voltage sensor pin
> +      will be scaled. The properties will convert the raw reading to a more
> +      meaningful number if voltage divider present. It has two numbers,
> +      the first number is the output resistor, the second number is the total
> +      resistance. Therefore, the adjusted vout is equal to
> +      Vout = Vout * output_resistance / total resistance.
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 2
> +    maxItems: 2
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      max20730@10 {
> +        compatible = "maxim,max20730";
> +        reg = <0x10>;
> +        vout-voltage-divider = <1000 2000>; // vout would be scaled to 0.5
> +      };
> +    };