Subject: Re: [PATCH v2 07/11] dt-bindings: arm: samsung: Convert Exynos PMU bindings to json-schema

From: Rob Herring <[email-masked]>
Date: Wed, 18 Sep 2019 07:43:06 -0500

On Sat, Sep 07, 2019 at 11:20:03AM +0200, Krzysztof Kozlowski wrote:
> Convert Samsung Exynos Power Management Unit (PMU) bindings to DT schema
> format using json-schema.
> 
> Signed-off-by: Krzysztof Kozlowski <[email-masked]>
> 
> ---
> 
> Changes since v1:
> 1. Fix clock-names to match all elements against schema (any number of
>    any clkoutN values).
>    This currently fails:
>        properties:clock-names:items: {'enum': ['clkout0', 'clkout1', 'clkout2',
>        'clkout3', 'clkout4', 'clkout5', 'clkout6', 'clkout7', 'clkout8',
>        'clkout9', 'clkout10', 'clkout11', 'clkout12', 'clkout13', 'clkout14',
>        'clkout15', 'clkout16']} is not of type 'array
> 
> 2. Add syscon reboot and poweroff nodes.
> ---
>  .../devicetree/bindings/arm/samsung/pmu.txt   |  72 -----------
>  .../devicetree/bindings/arm/samsung/pmu.yaml  | 117 ++++++++++++++++++
>  2 files changed, 117 insertions(+), 72 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/arm/samsung/pmu.txt
>  create mode 100644 Documentation/devicetree/bindings/arm/samsung/pmu.yaml
> 
> diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.txt b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
> deleted file mode 100644
> index 433bfd7593ac..000000000000
> --- a/Documentation/devicetree/bindings/arm/samsung/pmu.txt
> +++ /dev/null
> @@ -1,72 +0,0 @@
> -SAMSUNG Exynos SoC series PMU Registers
> -
> -Properties:
> - - compatible : should contain two values. First value must be one from following list:
> -		   - "samsung,exynos3250-pmu" - for Exynos3250 SoC,
> -		   - "samsung,exynos4210-pmu" - for Exynos4210 SoC,
> -		   - "samsung,exynos4412-pmu" - for Exynos4412 SoC,
> -		   - "samsung,exynos5250-pmu" - for Exynos5250 SoC,
> -		   - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
> -		   - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
> -		   - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
> -		   - "samsung,exynos5433-pmu" - for Exynos5433 SoC.
> -		   - "samsung,exynos7-pmu" - for Exynos7 SoC.
> -		second value must be always "syscon".
> -
> - - reg : offset and length of the register set.
> -
> - - #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
> -		The single specifier cell is used as index to list of clocks
> -		provided by PMU, which is currently:
> -			0 : SoC clock output (CLKOUT pin)
> -
> - - clock-names : list of clock names for particular CLKOUT mux inputs in
> -		following format:
> -			"clkoutN", where N is a decimal number corresponding to
> -			CLKOUT mux control bits value for given input, e.g.
> -				"clkout0", "clkout7", "clkout15".
> -
> - - clocks : list of phandles and specifiers to all input clocks listed in
> -		clock-names property.
> -
> -Optional properties:
> -
> -Some PMUs are capable of behaving as an interrupt controller (mostly
> -to wake up a suspended PMU). In which case, they can have the
> -following properties:
> -
> -- interrupt-controller: indicate that said PMU is an interrupt controller
> -
> -- #interrupt-cells: must be identical to the that of the parent interrupt
> -  controller.
> -
> -
> -Optional nodes:
> -
> -- nodes defining the restart and poweroff syscon children
> -
> -
> -Example :
> -pmu_system_controller: system-controller@10040000 {
> -	compatible = "samsung,exynos5250-pmu", "syscon";
> -	reg = <0x10040000 0x5000>;
> -	interrupt-controller;
> -	#interrupt-cells = <3>;
> -	interrupt-parent = <&gic>;
> -	#clock-cells = <1>;
> -	clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
> -			"clkout4", "clkout8", "clkout9";
> -	clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
> -		<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
> -		<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
> -		<&clock CLK_XUSBXTI>;
> -};
> -
> -Example of clock consumer :
> -
> -usb3503: usb3503@8 {
> -	/* ... */
> -	clock-names = "refclk";
> -	clocks = <&pmu_system_controller 0>;
> -	/* ... */
> -};
> diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.yaml b/Documentation/devicetree/bindings/arm/samsung/pmu.yaml
> new file mode 100644
> index 000000000000..a5a02f8237fb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/samsung/pmu.yaml
> @@ -0,0 +1,117 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/samsung/pmu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung Exynos SoC series Power Management Unit (PMU)
> +
> +maintainers:
> +  - Krzysztof Kozlowski <[email-masked]>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - samsung,exynos3250-pmu
> +          - samsung,exynos4210-pmu
> +          - samsung,exynos4412-pmu
> +          - samsung,exynos5250-pmu
> +          - samsung,exynos5260-pmu
> +          - samsung,exynos5410-pmu
> +          - samsung,exynos5420-pmu
> +          - samsung,exynos5433-pmu
> +          - samsung,exynos7-pmu
> +      - const: syscon
> +
> +  reg:
> +    maxItems: 1
> +
> +  '#clock-cells':
> +    const: 1
> +
> +  clock-names:
> +    description:
> +      List of clock names for particular CLKOUT mux inputs
> +    minItems: 1
> +    maxItems: 32
> +    items:
> +      enum:
> +        - clkout0
> +        - clkout1

Looking at this again, instead of enum, we can just do:

pattern: '^clkout([0-9]|[12][0-9]|3[0-1])$'

> +        - clkout2
> +        - clkout3
> +        - clkout4
> +        - clkout5
> +        - clkout6
> +        - clkout7
> +        - clkout8
> +        - clkout9
> +        - clkout10
> +        - clkout11
> +        - clkout12
> +        - clkout13
> +        - clkout14
> +        - clkout15
> +        - clkout16
> +        - clkout17
> +        - clkout18
> +        - clkout19
> +        - clkout20
> +        - clkout21
> +        - clkout22
> +        - clkout23
> +        - clkout24
> +        - clkout25
> +        - clkout26
> +        - clkout27
> +        - clkout28
> +        - clkout29
> +        - clkout30
> +        - clkout31

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