linux-kernel - Re: [PATCH 5/5] dt-bindings: clocks: at91sam9x5-sckc: convert to yaml

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Message-ID: <7f9f991a-fa56-2f65-293b-bd0ec5d07c40@linaro.org>
Date:   Thu, 4 May 2023 14:50:46 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com
Cc:     linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] dt-bindings: clocks: at91sam9x5-sckc: convert to yaml

On 04/05/2023 08:07, Claudiu Beznea wrote:
> Convert Atmel slow clock controller documentation to yaml.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> ---
>  .../devicetree/bindings/clock/at91-clock.txt  | 30 -------
>  .../bindings/clock/atmel,at91sam9x5-sckc.yaml | 84 +++++++++++++++++++
>  2 files changed, 84 insertions(+), 30 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/clock/at91-clock.txt
>  create mode 100644 Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt
> deleted file mode 100644
> index 57394785d3b0..000000000000
> --- a/Documentation/devicetree/bindings/clock/at91-clock.txt
> +++ /dev/null
> @@ -1,30 +0,0 @@
> -Device Tree Clock bindings for arch-at91
> -
> -This binding uses the common clock binding[1].
> -
> -[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
> -
> -Slow Clock controller:
> -
> -Required properties:
> -- compatible : shall be one of the following:
> -	"atmel,at91sam9x5-sckc",
> -	"atmel,sama5d3-sckc",
> -	"atmel,sama5d4-sckc" or
> -	"microchip,sam9x60-sckc":
> -		at91 SCKC (Slow Clock Controller)
> -- #clock-cells : shall be 1 for "microchip,sam9x60-sckc" otherwise shall be 0.
> -- clocks : shall be the input parent clock phandle for the clock.
> -
> -Optional properties:
> -- atmel,osc-bypass : boolean property. Set this when a clock signal is directly
> -  provided on XIN.
> -
> -For example:
> -	sckc@...ffe50 {
> -		compatible = "atmel,at91sam9x5-sckc";
> -		reg = <0xfffffe50 0x4>;
> -		clocks = <&slow_xtal>;
> -		#clock-cells = <0>;
> -	};
> -
> diff --git a/Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml b/Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml
> new file mode 100644
> index 000000000000..62660c823ea1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/atmel,at91sam9x5-sckc.yaml
> @@ -0,0 +1,84 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/clock/atmel,at91sam9x5-sckc.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"

Drop quotes.

> +
> +title: Atmel Slow Clock Controller (SCKC)
> +
> +maintainers:
> +  - Claudiu Beznea <claudiu.beznea@...rochip.com>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:

Drop items here.

> +          - enum:
> +              - atmel,at91sam9x5-sckc
> +              - atmel,sama5d4-sckc
> +              - atmel,sama5d3-sckc

Keep order by name, so 5d3 and then 5d4.

> +              - microchip,sam9x60-sckc
> +      - items:
> +          - const: microchip,sama7g5-sckc
> +          - const: microchip,sam9x60-sckc
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  "#clock-cells":
> +    enum: [0, 1]
> +
> +  atmel,osc-bypass:
> +    type: boolean
> +    description: set when a clock signal is directly provided on XIN
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false

put it after allOf, just like previous patch.

> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - microchip,sam9x60-sckc
> +              - microchip,sama7g5-sckc

Drop this one. It's not needed.

> +    then:
> +      properties:
> +        "#clock-cells":
> +          const: 1
> +      required:
> +        - "#clock-cells"
> +        - clocks

Move these to top-level.

> +    else:
> +      properties:
> +        "#clock-cells":
> +          const: 0
> +      if:
> +        properties:
> +          compatible:
> +            contains:
> +              enum:
> +                - atmel,sama5d4-sckc
> +                - atmel,sama5d3-sckc
> +      then:
> +        required:
> +          - "#clock-cells"
> +          - clocks

and drop these required... but this is if-within-else. Very confusing.
Which case you want to handle that way? So other compatibles do not need
clock cells or clocks?


Best regards,
Krzysztof