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a=openpgp; fpr=7B87460E16927FA9F5BFF10C5937189AD3FBC665 Add support for nexus map `power-domain-map` to be able to support hierarchical power domains for providers with #power-domain-cells > 0. Suggested-by: Rob Herring Signed-off-by: Kevin Hilman --- Documentation/devicetree/bindings/power/power-domain.yaml | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/Documentation/devicetree/bindings/power/power-domain.yaml b/Documentation/devicetree/bindings/power/power-domain.yaml index 8fdb529d560b..9f099d326aee 100644 --- a/Documentation/devicetree/bindings/power/power-domain.yaml +++ b/Documentation/devicetree/bindings/power/power-domain.yaml @@ -68,6 +68,15 @@ properties: by the given provider should be subdomains of the domain specified by this binding. + power-domains-map: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Nexus node mapping property that establishes parent-child relationships + for PM domains using the format defined in the Device Tree specification + section 2.5.1. Each map entry consists of child domain specifier, + parent phandle, and optional parent specifier arguments. This property + is only supported for onecell providers (#power-domain-cells = 1). + required: - "#power-domain-cells" @@ -133,3 +142,29 @@ examples: min-residency-us = <7000>; }; }; + + - | + // Example using power-domains-map for Nexus mapping + main_pd: power-controller@12370000 { + compatible = "foo,power-controller"; + reg = <0x12370000 0x1000>; + #power-domain-cells = <0>; + }; + + wkup_pd: power-controller@12380000 { + compatible = "foo,power-controller"; + reg = <0x12380000 0x1000>; + #power-domain-cells = <0>; + }; + + scmi_pds protocol@11 { + compatible = "arm,scmi-power-domain"; + reg = <0x11>; + #power-domain-cells = <1>; + power-domains-map = <15 &main_pd>, + <19 &wkup_pd>; + }; + + // In this example using Nexus node mapping: + // - Child domain 15 (scmi_pds 15) becomes a subdomain of main_pd + // - Child domain 19 (scmi_pds 19) becomes a subdomain of wkup_pd