Re: [PATCH v2 1/2] dt-bindings: hwmon: pmbus: add lt3074

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On Tue, Feb 25, 2025 at 09:01:13PM +0800, Cedric Encarnacion wrote:
> Add Analog Devices LT3074 Ultralow Noise, High PSRR Dropout Linear
> Regulator.
> 
> Signed-off-by: Cedric Encarnacion <cedricjustine.encarnacion@xxxxxxxxxx>
> ---
>  .../bindings/hwmon/pmbus/adi,lt3074.yaml           | 64 ++++++++++++++++++++++
>  MAINTAINERS                                        |  7 +++
>  2 files changed, 71 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/adi,lt3074.yaml b/Documentation/devicetree/bindings/hwmon/pmbus/adi,lt3074.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..714426fd655a8daa96e15e1f789743f36001ac7a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/pmbus/adi,lt3074.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/pmbus/adi,lt3074.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices LT3074 voltage regulator
> +
> +maintainers:
> +  - Cedric Encarnacion <cedricjustine.encarnacion@xxxxxxxxxx>
> +
> +description: |
> +  The LT3074 is a low voltage, ultra-low noise and ultra-fast transient
> +  response linear regulator. It allows telemetry for input/output voltage,
> +  output current and temperature through the PMBus serial interface.
> +
> +  Datasheet:
> +    https://www.analog.com/en/products/lt3074.html
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,lt3074
> +
> +  reg:
> +    maxItems: 1
> +
> +  regulators:
> +    type: object
> +    description: |
> +      list of regulators provided by this controller.

You have only one regulator, so drop the "regulators". vout could be
here, but since you do not have any other resources, I doubt it stands
on its own either. This is even visible in your DTS - you named the
device as regulator, so logically this is the regulator. Regulator does
not have regulators (otherwise they could also have regulators... so
triple regulator).

hwmon code might need some changes, but that's not really relevant for
proper hardware description.

Best regards,
Krzysztof





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