linux-kernel - Re: [PATCH v2 4/4] dt-bindings: regulator: Convert mp886x to json-schema

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Date:   Fri, 31 Jul 2020 15:20:44 -0600
From:   Rob Herring <robh@...nel.org>
To:     Jisheng Zhang <jszhang3@...l.ustc.edu.cn>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Saravanan Sekar <sravanhome@...il.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 4/4] dt-bindings: regulator: Convert mp886x to
 json-schema

On Wed, Jul 29, 2020 at 01:10:52PM +0800, Jisheng Zhang wrote:
> From: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
> 
> Convert the mp886x binding to DT schema format using json-schema.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
> ---
>  .../devicetree/bindings/regulator/mp886x.txt  | 31 ----------
>  .../bindings/regulator/mps,mp886x.yaml        | 58 +++++++++++++++++++
>  2 files changed, 58 insertions(+), 31 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/regulator/mp886x.txt
>  create mode 100644 Documentation/devicetree/bindings/regulator/mps,mp886x.yaml
> 
> diff --git a/Documentation/devicetree/bindings/regulator/mp886x.txt b/Documentation/devicetree/bindings/regulator/mp886x.txt
> deleted file mode 100644
> index e747000cebba..000000000000
> --- a/Documentation/devicetree/bindings/regulator/mp886x.txt
> +++ /dev/null
> @@ -1,31 +0,0 @@
> -Monolithic Power Systems MP8867/MP8869 voltage regulator
> -
> -Required properties:
> -- compatible: Must be one of the following.
> -	"mps,mp8867"
> -	"mps,mp8869"
> -- reg: I2C slave address.
> -- enable-gpios: enable gpios.
> -- mps,fb-voltage-divider: An array of two integers containing the resistor
> -  values R1 and R2 of the feedback voltage divider in kilo ohms.
> -
> -Optional properties:
> -- mps,switch-frequency: The valid switch frequency in Hertz. Available values
> -  are: 500000, 750000, 1000000, 1250000, 1500000
> -
> -Any property defined as part of the core regulator binding, defined in
> -./regulator.txt, can also be used.
> -
> -Example:
> -
> -	vcpu: regulator@62 {
> -		compatible = "mps,mp8869";
> -		regulator-name = "vcpu";
> -		regulator-min-microvolt = <700000>;
> -		regulator-max-microvolt = <850000>;
> -		regulator-always-on;
> -		regulator-boot-on;
> -		enable-gpios = <&porta 1 GPIO_ACTIVE_LOW>;
> -		mps,fb-voltage-divider = <80 240>;
> -		reg = <0x62>;
> -	};
> diff --git a/Documentation/devicetree/bindings/regulator/mps,mp886x.yaml b/Documentation/devicetree/bindings/regulator/mps,mp886x.yaml
> new file mode 100644
> index 000000000000..991f2de7eda8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/mps,mp886x.yaml
> @@ -0,0 +1,58 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/regulator/mps,mp886x.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Monolithic Power Systems MP8867/MP8869 voltage regulator
> +
> +maintainers:
> +  - Jisheng Zhang <jszhang@...nel.org>

Needs a $ref to regulator.yaml.

> +
> +properties:
> +  compatible:
> +    enum:
> +      - mps,mp8867
> +      - mps,mp8869
> +
> +  reg:
> +    maxItems: 1
> +
> +  enable-gpios:
> +    description: GPIO to enable/disable the regulator.
> +    maxItems: 1
> +
> +  mps,fb-voltage-divider:
> +    description: An array of two integers containing the resistor

Sounds like a constraint. Add 'maxItems: 2'.

> +      values R1 and R2 of the feedback voltage divider in kilo ohms.
> +    $ref: "/schemas/types.yaml#/definitions/uint32-array"
> +
> +  mps,switch-frequency:
> +    description: The valid switch frequency in Hertz.
> +    enum: [500000, 750000, 1000000, 1250000, 1500000]
> +    $ref: "/schemas/types.yaml#/definitions/uint32"

With -hz added, the type will already be defined, so you can drop the 
$ref.

> +
> +required:
> +  - compatible
> +  - reg
> +  - enable-gpios
> +  - mps,fb-voltage-divider
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        regulator@62 {
> +          compatible = "mps,mp8869";
> +          regulator-name = "vcpu";
> +          regulator-min-microvolt = <800000>;
> +          regulator-max-microvolt = <1150000>;
> +          enable-gpios = <&porta 1 GPIO_ACTIVE_LOW>;
> +          mps,fb-voltage-divider = <80 240>;
> +          reg = <0x62>;
> +        };
> +    };
> +
> +...
> -- 
> 2.28.0.rc1
> 
>