1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 # Copyright 2021 Linaro Ltd.
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/thermal/qcom-lmh.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Qualcomm Limits Management Hardware(LMh)
9
10 maintainers:
11 - Thara Gopinath <thara.gopinath@gmail.com>
12
13 description:
14 Limits Management Hardware(LMh) is a hardware infrastructure on some
15 Qualcomm SoCs that can enforce temperature and current limits as
16 programmed by software for certain IPs like CPU.
17
18 properties:
19 compatible:
20 oneOf:
21 - enum:
22 - qcom,sc8180x-lmh
23 - qcom,sdm845-lmh
24 - qcom,sm8150-lmh
25 - items:
26 - const: qcom,qcm2290-lmh
27 - const: qcom,sm8150-lmh
28
29 reg:
30 items:
31 - description: core registers
32
33 interrupts:
34 maxItems: 1
35
36 '#interrupt-cells':
37 const: 1
38
39 interrupt-controller: true
40
41 cpus:
42 description:
43 phandle of the first cpu in the LMh cluster
44 maxItems: 1
45
46 qcom,lmh-temp-arm-millicelsius:
47 description:
48 An integer expressing temperature threshold at which the LMh thermal
49 FSM is engaged.
50
51 qcom,lmh-temp-low-millicelsius:
52 description:
53 An integer expressing temperature threshold at which the state machine
54 will attempt to remove frequency throttling.
55
56 qcom,lmh-temp-high-millicelsius:
57 description:
58 An integer expressing temperature threshold at which the state machine
59 will attempt to throttle the frequency.
60
61 required:
62 - compatible
63 - reg
64 - interrupts
65 - '#interrupt-cells'
66 - interrupt-controller
67 - cpus
68 - qcom,lmh-temp-arm-millicelsius
69 - qcom,lmh-temp-low-millicelsius
70 - qcom,lmh-temp-high-millicelsius
71
72 additionalProperties: false
73
74 examples:
75 - |
76 #include <dt-bindings/interrupt-controller/arm-gic.h>
77
78 lmh@17d70800 {
79 compatible = "qcom,sdm845-lmh";
80 reg = <0x17d70800 0x400>;
81 interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
82 cpus = <&CPU4>;
83 qcom,lmh-temp-arm-millicelsius = <65000>;
84 qcom,lmh-temp-low-millicelsius = <94500>;
85 qcom,lmh-temp-high-millicelsius = <95000>;
86 interrupt-controller;
87 #interrupt-cells = <1>;
88 };
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