xref: /linux/Documentation/devicetree/bindings/power/apple,pmgr-pwrstate.yaml (revision 24bce201d79807b668bf9d9e0aca801c5c0d5f78) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/power/apple,pmgr-pwrstate.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Apple SoC PMGR Power States
8
9maintainers:
10  - Hector Martin <marcan@marcan.st>
11
12allOf:
13  - $ref: "power-domain.yaml#"
14
15description: |
16  Apple SoCs include PMGR blocks responsible for power management,
17  which can control various clocks, resets, power states, and
18  performance features. This binding describes the device power
19  state registers, which control power states and resets.
20
21  Each instance of a power controller within the PMGR syscon node
22  represents a generic power domain provider, as documented in
23  Documentation/devicetree/bindings/power/power-domain.yaml.
24  The provider controls a single SoC block. The power hierarchy is
25  represented via power-domains relationships between these nodes.
26
27  See Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml
28  for the top-level PMGR node documentation.
29
30properties:
31  compatible:
32    items:
33      - enum:
34          - apple,t8103-pmgr-pwrstate
35          - apple,t6000-pmgr-pwrstate
36      - const: apple,pmgr-pwrstate
37
38  reg:
39    maxItems: 1
40
41  "#power-domain-cells":
42    const: 0
43
44  "#reset-cells":
45    const: 0
46
47  power-domains:
48    description:
49      Reference to parent power domains. A domain may have multiple parents,
50      and all will be powered up when it is powered.
51    minItems: 1
52    maxItems: 8 # Arbitrary, should be enough
53
54  label:
55    description:
56      Specifies the name of the SoC domain being controlled. This is used to
57      name the power/reset domains.
58
59  apple,always-on:
60    description:
61      Forces this power domain to always be powered up.
62    type: boolean
63
64  apple,min-state:
65    description:
66      Specifies the minimum power state for auto-PM.
67      0 = power gated, 4 = clock gated, 15 = on.
68    $ref: /schemas/types.yaml#/definitions/uint32
69    minimum: 0
70    maximum: 15
71
72required:
73  - compatible
74  - reg
75  - "#power-domain-cells"
76  - "#reset-cells"
77  - label
78
79additionalProperties: false
80