xref: /linux/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml (revision 1ac731c529cd4d6adbce134754b51ff7d822b145)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/apple,pmgr-pwrstate.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Apple SoC PMGR Power States

maintainers:
  - Hector Martin <marcan@marcan.st>

allOf:
  - $ref: power-domain.yaml#

description: |
  Apple SoCs include PMGR blocks responsible for power management,
  which can control various clocks, resets, power states, and
  performance features. This binding describes the device power
  state registers, which control power states and resets.

  Each instance of a power controller within the PMGR syscon node
  represents a generic power domain provider, as documented in
  Documentation/devicetree/bindings/power/power-domain.yaml.
  The provider controls a single SoC block. The power hierarchy is
  represented via power-domains relationships between these nodes.

  See Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml
  for the top-level PMGR node documentation.

properties:
  compatible:
    items:
      - enum:
          - apple,t8103-pmgr-pwrstate
          - apple,t8112-pmgr-pwrstate
          - apple,t6000-pmgr-pwrstate
      - const: apple,pmgr-pwrstate

  reg:
    maxItems: 1

  "#power-domain-cells":
    const: 0

  "#reset-cells":
    const: 0

  power-domains:
    description:
      Reference to parent power domains. A domain may have multiple parents,
      and all will be powered up when it is powered.
    minItems: 1
    maxItems: 8 # Arbitrary, should be enough

  label:
    description:
      Specifies the name of the SoC domain being controlled. This is used to
      name the power/reset domains.

  apple,always-on:
    description:
      Forces this power domain to always be powered up.
    type: boolean

  apple,min-state:
    description:
      Specifies the minimum power state for auto-PM.
      0 = power gated, 4 = clock gated, 15 = on.
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 0
    maximum: 15

required:
  - compatible
  - reg
  - "#power-domain-cells"
  - "#reset-cells"
  - label

additionalProperties: false