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77 lines
1.8 KiB
77 lines
1.8 KiB
# SPDX-License-Identifier: GPL-2.0 |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/bus/simple-pm-bus.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Simple Power-Managed Bus |
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maintainers: |
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- Geert Uytterhoeven <[email protected]> |
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description: | |
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A Simple Power-Managed Bus is a transparent bus that doesn't need a real |
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driver, as it's typically initialized by the boot loader. |
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However, its bus controller is part of a PM domain, or under the control |
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of a functional clock. Hence, the bus controller's PM domain and/or |
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clock must be enabled for child devices connected to the bus (either |
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on-SoC or externally) to function. |
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While "simple-pm-bus" follows the "simple-bus" set of properties, as |
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specified in the Devicetree Specification, it is not an extension of |
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"simple-bus". |
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properties: |
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$nodename: |
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pattern: "^bus(@[0-9a-f]+)?$" |
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compatible: |
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contains: |
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const: simple-pm-bus |
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description: |
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Shall contain "simple-pm-bus" in addition to a optional bus-specific |
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compatible strings defined in individual pm-bus bindings. |
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'#address-cells': |
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enum: [ 1, 2 ] |
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'#size-cells': |
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enum: [ 1, 2 ] |
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ranges: true |
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clocks: true |
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# Functional clocks |
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# Required if power-domains is absent, optional otherwise |
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power-domains: |
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# Required if clocks is absent, optional otherwise |
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minItems: 1 |
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required: |
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- compatible |
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- '#address-cells' |
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- '#size-cells' |
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- ranges |
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anyOf: |
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- required: |
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- clocks |
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- required: |
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- power-domains |
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additionalProperties: true |
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examples: |
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- | |
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#include <dt-bindings/clock/qcom,gcc-msm8996.h> |
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#include <dt-bindings/interrupt-controller/irq.h> |
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bus { |
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power-domains = <&gcc AGGRE0_NOC_GDSC>; |
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compatible = "simple-pm-bus"; |
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#address-cells = <1>; |
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#size-cells = <1>; |
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ranges; |
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};
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