1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/soc/qcom/qcom,smd-rpm.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Qualcomm Resource Power Manager (RPM) over SMD
8
9description: |
10  This driver is used to interface with the Resource Power Manager (RPM) found
11  in various Qualcomm platforms. The RPM allows each component in the system
12  to vote for state of the system resources, such as clocks, regulators and bus
13  frequencies.
14
15  The SMD information for the RPM edge should be filled out.  See qcom,smd.txt
16  for the required edge properties.  All SMD related properties will reside
17  within the RPM node itself.
18
19  The RPM exposes resources to its subnodes.  The rpm_requests node must be
20  present and this subnode may contain children that designate regulator
21  resources.
22
23  Refer to Documentation/devicetree/bindings/regulator/qcom,smd-rpm-regulator.yaml
24  for information on the regulator subnodes that can exist under the
25  rpm_requests.
26
27maintainers:
28  - Kathiravan T <kathirav@codeaurora.org>
29
30properties:
31  compatible:
32    enum:
33      - qcom,rpm-apq8084
34      - qcom,rpm-ipq6018
35      - qcom,rpm-msm8226
36      - qcom,rpm-msm8916
37      - qcom,rpm-msm8974
38      - qcom,rpm-msm8976
39      - qcom,rpm-msm8996
40      - qcom,rpm-msm8998
41      - qcom,rpm-sdm660
42      - qcom,rpm-sm6125
43      - qcom,rpm-qcs404
44
45  qcom,smd-channels:
46    $ref: /schemas/types.yaml#/definitions/string-array
47    description: Channel name used for the RPM communication
48    items:
49      - const: rpm_requests
50
51if:
52  properties:
53    compatible:
54      contains:
55        enum:
56          - qcom,rpm-apq8084
57          - qcom,rpm-msm8916
58          - qcom,rpm-msm8974
59then:
60  required:
61    - qcom,smd-channels
62
63required:
64  - compatible
65
66additionalProperties: false
67
68examples:
69  - |
70    #include <dt-bindings/interrupt-controller/arm-gic.h>
71    #include <dt-bindings/interrupt-controller/irq.h>
72
73    smd {
74        compatible = "qcom,smd";
75
76        rpm {
77            interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
78            qcom,ipc = <&apcs 8 0>;
79            qcom,smd-edge = <15>;
80
81                rpm_requests {
82                        compatible = "qcom,rpm-msm8974";
83                        qcom,smd-channels = "rpm_requests";
84
85                        /* Regulator nodes to follow */
86                };
87            };
88     };
89...
90