linux-kernel - Re: [PATCH v1 6/9] dt-bindings: hwmon: Add HPE GXP PSU Support

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Date:   Fri, 21 Apr 2023 13:13:34 -0500
From:   Rob Herring <robh@...nel.org>
To:     nick.hawkins@....com
Cc:     verdun@....com, linus.walleij@...aro.org, brgl@...ev.pl,
        krzysztof.kozlowski+dt@...aro.org, jdelvare@...e.com,
        linux@...ck-us.net, linux@...linux.org.uk,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1 6/9] dt-bindings: hwmon: Add HPE GXP PSU Support

On Tue, Apr 18, 2023 at 10:28:21AM -0500, nick.hawkins@....com wrote:
> From: Nick Hawkins <nick.hawkins@....com>
> 
> Provide i2c register information and CPLD register information to the
> driver.
> 
> Signed-off-by: Nick Hawkins <nick.hawkins@....com>
> ---
>  .../bindings/hwmon/hpe,gxp-psu.yaml           | 45 +++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/hwmon/hpe,gxp-psu.yaml
> 
> diff --git a/Documentation/devicetree/bindings/hwmon/hpe,gxp-psu.yaml b/Documentation/devicetree/bindings/hwmon/hpe,gxp-psu.yaml
> new file mode 100644
> index 000000000000..60ca0f6ace46
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/hpe,gxp-psu.yaml
> @@ -0,0 +1,45 @@
> +# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/hwmon/hpe,gxp-psu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: HPE GXP psu controller
> +
> +maintainers:
> +  - Nicholas Hawkins <nick.hawkins@....com>
> +
> +properties:
> +  compatible:
> +    const: hpe,gxp-psu
> +  interrupts:
> +    maxItems: 1
> +
> +  reg:
> +    maxItems: 1
> +
> +  hpe,sysreg:

Why is this optional?

> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      Phandle to the global status registers shared between each psu
> +      controller instance.
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        psu@48 {
> +            compatible = "hpe,gxp-psu";
> +            reg = <0x48>;
> +            hpe,sysreg = <&sysreg_system_controller2>;
> +        };
> +    };
> -- 
> 2.17.1
>