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