Subject: Re: [PATCH v2 1/3] dt-bindings: power: Convert Generic Power Domain bindings to json-schema

From: Rob Herring <[email-masked]>
Date: Fri, 11 Oct 2019 10:03:39 -0500

On Wed, Oct 02, 2019 at 06:06:30PM +0200, Krzysztof Kozlowski wrote:
> Convert Generic Power Domain bindings to DT schema format using
> json-schema.  The consumer bindings are split to separate file.
> 
> Signed-off-by: Krzysztof Kozlowski <[email-masked]>
> 
> ---
> 
> Changes since v1:
> 1. Select all nodes for consumers,
> 2. Remove from consumers duplicated properties with dt-schema,
> 3. Fix power domain pattern,
> 4. Remove unneeded types.
> ---
>  .../devicetree/bindings/arm/arm,scmi.txt      |   2 +-
>  .../devicetree/bindings/arm/arm,scpi.txt      |   2 +-
>  .../bindings/arm/freescale/fsl,scu.txt        |   2 +-
>  .../bindings/clock/clk-exynos-audss.txt       |   2 +-
>  .../bindings/clock/exynos5433-clock.txt       |   4 +-
>  .../bindings/clock/renesas,cpg-mssr.txt       |   2 +-
>  .../clock/renesas,r8a7778-cpg-clocks.txt      |   2 +-
>  .../clock/renesas,r8a7779-cpg-clocks.txt      |   2 +-
>  .../clock/renesas,rcar-gen2-cpg-clocks.txt    |   2 +-
>  .../bindings/clock/renesas,rz-cpg-clocks.txt  |   2 +-
>  .../bindings/clock/ti/davinci/psc.txt         |   2 +-
>  .../bindings/display/etnaviv/etnaviv-drm.txt  |   2 +-
>  .../devicetree/bindings/display/msm/dpu.txt   |   2 +-
>  .../devicetree/bindings/display/msm/mdp5.txt  |   2 +-
>  .../devicetree/bindings/dsp/fsl,dsp.yaml      |   2 +-
>  .../firmware/nvidia,tegra186-bpmp.txt         |   2 +-
>  .../bindings/media/imx7-mipi-csi2.txt         |   3 +-
>  .../bindings/media/mediatek-jpeg-decoder.txt  |   3 +-
>  .../bindings/media/mediatek-mdp.txt           |   3 +-
>  .../bindings/opp/qcom-nvmem-cpufreq.txt       |   2 +-
>  .../devicetree/bindings/pci/pci-keystone.txt  |   2 +-
>  .../bindings/phy/ti,phy-am654-serdes.txt      |   2 +-
>  .../bindings/power/amlogic,meson-gx-pwrc.txt  |   2 +-
>  .../devicetree/bindings/power/fsl,imx-gpc.txt |   2 +-
>  .../bindings/power/fsl,imx-gpcv2.txt          |   2 +-
>  .../power/power-domain-consumers.yaml         | 105 +++++++++
>  .../bindings/power/power-domain.yaml          | 134 ++++++++++++
>  .../bindings/power/power_domain.txt           | 205 ------------------
>  .../devicetree/bindings/power/qcom,rpmpd.txt  |   2 +-
>  .../bindings/power/renesas,rcar-sysc.txt      |   2 +-
>  .../bindings/power/renesas,sysc-rmobile.txt   |   2 +-
>  .../bindings/power/xlnx,zynqmp-genpd.txt      |   2 +-
>  .../bindings/soc/bcm/brcm,bcm2835-pm.txt      |   2 +-
>  .../bindings/soc/mediatek/scpsys.txt          |   2 +-
>  .../bindings/soc/ti/sci-pm-domain.txt         |   2 +-
>  .../bindings/usb/nvidia,tegra124-xusb.txt     |   4 +-
>  MAINTAINERS                                   |   2 +-
>  37 files changed, 278 insertions(+), 241 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/power/power-domain-consumers.yaml
>  create mode 100644 Documentation/devicetree/bindings/power/power-domain.yaml
>  delete mode 100644 Documentation/devicetree/bindings/power/power_domain.txt

> diff --git a/Documentation/devicetree/bindings/power/power-domain-consumers.yaml b/Documentation/devicetree/bindings/power/power-domain-consumers.yaml
> new file mode 100644
> index 000000000000..f65078e1260e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/power-domain-consumers.yaml
> @@ -0,0 +1,105 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/power-domain-consumers.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PM domain consumers
> +
> +maintainers:
> +  - Rafael J. Wysocki <[email-masked]>
> +  - Kevin Hilman <[email-masked]>
> +  - Ulf Hansson <[email-masked]>
> +
> +description: |+
> +  See power-domain.yaml
> +
> +select: true
> +
> +allOf:
> +  - $ref: /schemas/power-domain/power-domain-consumer.yaml

I don't like this split. We should move the contents of this file to the 
above file.

I checked the authorship of the relevant lines and they are all except 
for a small number of lines from Linaro authors (Viresh and Ulf). I have 
permission from Linaro to dual license Linaro authored bindings, so it's 
not a problem to move this. I can do that and you can just drop this file.

> +
> +properties:
> +  required-opps:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      This contains phandle to an OPP node in another device's OPP table.
> +      It may contain an array of phandles, where each phandle points to an OPP
> +      of a different device. It should not contain multiple phandles to the OPP
> +      nodes in the same OPP table. This specifies the minimum required OPP
> +      of the device(s), whose OPP's phandle is present in this property,
> +      for the functioning of the current device at the current OPP (where this
> +      property is present).
> +
> +examples:
> +  - |
> +    leaky-device@12350000 {
> +      compatible = "foo,i-leak-current";
> +      reg = <0x12350000 0x1000>;
> +      power-domains = <&power 0>;
> +      power-domain-names = "io";
> +    };
> +
> +    leaky-device@12351000 {
> +      compatible = "foo,i-leak-current";
> +      reg = <0x12351000 0x1000>;
> +      power-domains = <&power 0>, <&power 1> ;
> +      power-domain-names = "io", "clk";
> +    };
> +
> +    // The first example above defines a typical PM domain consumer device, which is
> +    // located inside a PM domain with index 0 of a power controller represented by a
> +    // node with the label "power".
> +    // In the second example the consumer device are partitioned across two PM domains,
> +    // the first with index 0 and the second with index 1, of a power controller that
> +    // is represented by a node with the label "power".
> +
> +  - |
> +    // Example with  OPP table for domain provider that provides two domains:
> +
> +    domain0_opp_table: opp-table0 {
> +      compatible = "operating-points-v2";
> +
> +      domain0_opp_0: opp-1000000000 {
> +        opp-hz = /bits/ 64 <1000000000>;
> +        opp-microvolt = <975000 970000 985000>;
> +      };
> +      domain0_opp_1: opp-1100000000 {
> +        opp-hz = /bits/ 64 <1100000000>;
> +        opp-microvolt = <1000000 980000 1010000>;
> +      };
> +    };
> +
> +    domain1_opp_table: opp-table1 {
> +      compatible = "operating-points-v2";
> +
> +      domain1_opp_0: opp-1200000000 {
> +        opp-hz = /bits/ 64 <1200000000>;
> +        opp-microvolt = <975000 970000 985000>;
> +      };
> +      domain1_opp_1: opp-1300000000 {
> +        opp-hz = /bits/ 64 <1300000000>;
> +        opp-microvolt = <1000000 980000 1010000>;
> +      };
> +    };
> +
> +    power: power-controller@12340000 {
> +      compatible = "foo,power-controller";
> +      reg = <0x12340000 0x1000>;
> +      #power-domain-cells = <1>;
> +      operating-points-v2 = <&domain0_opp_table>, <&domain1_opp_table>;
> +    };
> +
> +    leaky-device0@12350000 {
> +      compatible = "foo,i-leak-current";
> +      reg = <0x12350000 0x1000>;
> +      power-domains = <&power 0>;
> +      required-opps = <&domain0_opp_0>;
> +    };
> +
> +    leaky-device1@12350000 {
> +      compatible = "foo,i-leak-current";
> +      reg = <0x12350000 0x1000>;
> +      power-domains = <&power 1>;
> +      required-opps = <&domain1_opp_1>;
> +    };

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