[PATCH v8 06/34] dt-bindings: clock: tegra-car: Document new tegra-clocks sub-node

[Rob Herring]

On Tue, Aug 17, 2021 at 04:27:26AM +0300, Dmitry Osipenko wrote:
> Document tegra-clocks sub-node which describes Tegra SoC clocks that
> require a higher voltage of the core power domain in order to operate
> properly on a higher clock rates.  Each node contains a phandle to OPP
> table and power domain.
> 
> The root PLLs and system clocks don't have any specific device dedicated
> to them, clock controller is in charge of managing power for them.
> 
> Signed-off-by: Dmitry Osipenko <digetx at gmail.com>
> ---
>  .../bindings/clock/nvidia,tegra20-car.yaml    | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml b/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
> index 459d2a525393..7f5cd27e4ce0 100644
> --- a/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
> +++ b/Documentation/devicetree/bindings/clock/nvidia,tegra20-car.yaml
> @@ -42,6 +42,48 @@ properties:
>    "#reset-cells":
>      const: 1
>  
> +  tegra-clocks:
> +    description: child nodes are the output clocks from the CAR
> +    type: object
> +
> +    patternProperties:
> +      "^[a-z]+[0-9]+$":
> +        type: object
> +        properties:
> +          compatible:
> +            allOf:
> +              - items:
> +                  - enum:
> +                      - nvidia,tegra20-sclk
> +                      - nvidia,tegra30-sclk
> +                      - nvidia,tegra30-pllc
> +                      - nvidia,tegra30-plle
> +                      - nvidia,tegra30-pllm
> +              - const: nvidia,tegra-clock

You are saying the first string must be both one of the enums and 
'nvidia,tegra-clock'. You don't get an error because your pattern 
doesn't match 'sclk'.

> +
> +          operating-points-v2:
> +            $ref: /schemas/types.yaml#/definitions/phandle
> +            description:
> +              Phandle to OPP table that contains frequencies, voltages and
> +              opp-supported-hw property, which is a bitfield indicating
> +              SoC process or speedo ID mask.

Just 'operating-points-v2: true' is enough.

> +
> +          clocks:
> +            items:
> +              - description: node's clock
> +
> +          power-domains:
> +            maxItems: 1
> +            description: phandle to the core SoC power domain
> +
> +        required:
> +          - compatible
> +          - operating-points-v2
> +          - clocks
> +          - power-domains
> +
> +        additionalProperties: false
> +
>  required:
>    - compatible
>    - reg
> @@ -59,6 +101,15 @@ examples:
>          reg = <0x60006000 0x1000>;
>          #clock-cells = <1>;
>          #reset-cells = <1>;
> +
> +        tegra-clocks {
> +            sclk {
> +                compatible = "nvidia,tegra20-sclk", "nvidia,tegra-clock";
> +                operating-points-v2 = <&opp_table>;
> +                clocks = <&tegra_car TEGRA20_CLK_SCLK>;
> +                power-domains = <&domain>;
> +            };
> +        };
>      };
>  
>      usb-controller at c5004000 {
> -- 
> 2.32.0
> 
>