Re: [PATCH RFC] dt-bindings: mfd: ams,as3711: Convert to json-schema

[Rob Herring <robh@kernel.org>]

On Mon, Oct 23, 2023 at 08:38:07PM +0200, Geert Uytterhoeven wrote:
> Convert the Austria MicroSystems AS3711 Quad Buck High Current PMIC with
> Charger Device Tree binding documentation to json-schema.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> RFC, as I couldn't get the multiple dependencies right (see FIXMEs):
>   1. How to incorporate "su2-dev: [ su2-max-uA ]" and
>      "su2-feedback-curr-auto: [ su2-dev ]"?
>   2. su2-dev requiring one of su2-fbprot-* does not seem to work?
> 
> Anyone with better *Of foo? Thanks!
> ---
>  .../devicetree/bindings/mfd/ams,as3711.yaml   | 223 ++++++++++++++++++
>  .../devicetree/bindings/mfd/as3711.txt        |  73 ------
>  2 files changed, 223 insertions(+), 73 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ams,as3711.yaml
>  delete mode 100644 Documentation/devicetree/bindings/mfd/as3711.txt
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ams,as3711.yaml b/Documentation/devicetree/bindings/mfd/ams,as3711.yaml
> new file mode 100644
> index 0000000000000000..d9f08e017194c4f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ams,as3711.yaml
> @@ -0,0 +1,223 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ams,as3711.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Austria MicroSystems AS3711 Quad Buck High Current PMIC with Charger
> +
> +maintainers:
> +  - Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
> +
> +description:
> +  AS3711 is an I2C PMIC from Austria MicroSystems with multiple DCDC and LDO
> +  power supplies, a battery charger and an RTC.  So far only bindings for the
> +  two stepup DCDC converters are defined.

step-up?

> +
> +properties:
> +  compatible:
> +    const: ams,as3711
> +
> +  reg:
> +    maxItems: 1
> +
> +  backlight:
> +    description:
> +      Step-up converter configuration, to be used as a backlight source
> +    type: object
> +    properties:
> +      compatible:
> +        const: ams,as3711-bl
> +
> +      su1-dev:
> +        description: Framebuffer phandle for the first step-up converter
> +        $ref: /schemas/types.yaml#/definitions/phandle
> +
> +      su1-max-uA:
> +        description: Maximum current for the first step-up converter
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +
> +      su2-dev:
> +        description: Framebuffer phandle for the second step-up converter
> +        $ref: /schemas/types.yaml#/definitions/phandle
> +
> +      su2-max-uA:
> +        description: Maximum current for the second step-up converter
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +
> +      su2-feedback-voltage:
> +        description: Second step-up converter uses voltage feedback
> +        type: boolean
> +
> +      su2-feedback-curr1:
> +        description:
> +          Second step-up converter uses CURR1 input for current feedback
> +        type: boolean
> +
> +      su2-feedback-curr2:
> +        description:
> +          Second step-up converter uses CURR2 input for current feedback
> +        type: boolean
> +
> +      su2-feedback-curr3:
> +        description:
> +          Second step-up converter uses CURR3 input for current feedback
> +        type: boolean
> +
> +      su2-feedback-curr-auto:
> +        description:
> +          Second step-up converter uses automatic current feedback selection
> +        type: boolean
> +
> +      su2-fbprot-lx-sd4:
> +        description:
> +          Second step-up converter uses LX_SD4 for over-voltage protection
> +        type: boolean
> +
> +      su2-fbprot-gpio2:
> +        description:
> +          Second step-up converter uses GPIO2 for over-voltage protection
> +        type: boolean
> +
> +      su2-fbprot-gpio3:
> +        description:
> +          Second step-up converter uses GPIO3 for over-voltage protection
> +        type: boolean
> +
> +      su2-fbprot-gpio4:
> +        description:
> +          Second step-up converter uses GPIO4 for over-voltage protection
> +        type: boolean
> +
> +      su2-auto-curr1:
> +        description:
> +          Second step-up converter uses CURR1 input for automatic current
> +          feedback
> +        type: boolean
> +
> +      su2-auto-curr2:
> +        description:
> +          Second step-up converter uses CURR2 input for automatic current
> +          feedback
> +        type: boolean
> +
> +      su2-auto-curr3:
> +        description:
> +          Second step-up converter uses CURR3 input for automatic current
> +          feedback
> +        type: boolean
> +
> +    required:
> +      - compatible
> +
> +    dependencies:
> +      # To use the SU1 converter as a backlight source the following two
> +      # properties must be provided:
> +      su1-dev: [ su1-max-uA ]
> +      su1-max-uA: [ su1-dev ]
> +
> +      # To use the SU2 converter as a backlight source the following two
> +      # properties must be provided:
> +      # FIXME How to incorporate "su2-dev: [ su2-max-uA ]"?
> +      # FIXME su2-dev requiring one of su2-fbprot-* does not seem to work?
> +      su2-dev:
> +        allOf:
> +          - oneOf:
> +              - required:
> +                  - su2-feedback-voltage
> +              - required:
> +                  - su2-feedback-curr1
> +              - required:
> +                  - su2-feedback-curr2
> +              - required:
> +                  - su2-feedback-curr3
> +              - required:
> +                  - su2-feedback-curr-auto
> +          - oneof:
> +              - required:
> +                  - su2-fbprot-lx-sd4
> +              - required:
> +                  - su2-fbprot-gpio2
> +              - required:
> +                  - su2-fbprot-gpio3
> +              - required:
> +                  - su2-fbprot-gpio4
> +
> +      su2-max-uA: [ su2-dev ]
> +      su2-feedback-voltage: [ su2-dev ]
> +      su2-feedback-curr1: [ su2-dev ]
> +      su2-feedback-curr2: [ su2-dev ]
> +      su2-feedback-curr3: [ su2-dev ]
> +      # FIXME How to incorporate "su2-feedback-curr-auto: [ su2-dev ]"?
> +      su2-feedback-curr-auto:
> +        anyOf:
> +          - required:
> +              - su2-auto-curr1
> +          - required:
> +              - su2-auto-curr2
> +          - required:
> +              - su2-auto-curr3
> +      su2-fbprot-lx-sd4: [ su2-dev ]
> +      su2-fbprot-gpio2: [ su2-dev ]
> +      su2-fbprot-gpio3: [ su2-dev ]
> +      su2-fbprot-gpio4: [ su2-dev ]
> +      su2-auto-curr1: [ su2-feedback-curr-auto ]
> +      su2-auto-curr2: [ su2-feedback-curr-auto ]
> +      su2-auto-curr3: [ su2-feedback-curr-auto ]
> +
> +    additionalProperties: false

Move this above 'properties'. Easier to read in the indented cases.

> +
> +  regulators:
> +    description: Other DCDC and LDO supplies
> +    type: object
> +    patternProperties:
> +      "^(sd[1-4]|ldo[1-8])$":
> +        type: object
> +        $ref: /schemas/regulator/regulator.yaml#
> +        unevaluatedProperties: false
> +
> +    unevaluatedProperties: false

Same here, though this one is short.

> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        as3711@40 {

pmic@40

> +            compatible = "ams,as3711";
> +            reg = <0x40>;
> +
> +            regulators {
> +                sd4 {
> +                    regulator-name = "1.215V";
> +                    regulator-min-microvolt = <1215000>;
> +                    regulator-max-microvolt = <1235000>;
> +                };
> +                ldo2 {
> +                    regulator-name = "2.8V CPU";
> +                    regulator-min-microvolt = <2800000>;
> +                    regulator-max-microvolt = <2800000>;
> +                    regulator-always-on;
> +                    regulator-boot-on;
> +                };
> +            };
> +
> +            backlight {
> +                compatible = "ams,as3711-bl";
> +                su2-dev = <&lcdc>;
> +                su2-max-uA = <36000>;
> +                su2-feedback-curr-auto;
> +                su2-fbprot-gpio4;
> +                su2-auto-curr1;
> +                su2-auto-curr2;
> +                su2-auto-curr3;
> +            };
> +        };
> +    };