xref: /linux/Documentation/devicetree/bindings/soc/qcom/qcom,saw2.yaml (revision 6e7fd890f1d6ac83805409e9c346240de2705584) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/soc/qcom/qcom,saw2.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm Subsystem Power Manager / SPM AVS Wrapper 2 (SAW2)
8
9maintainers:
10  - Andy Gross <agross@kernel.org>
11  - Bjorn Andersson <bjorn.andersson@linaro.org>
12
13description: |
14  The Qualcomm Subsystem Power Manager is used to control the peripheral logic
15  surrounding the application cores in Qualcomm platforms.
16
17  The SAW2 is a wrapper around the Subsystem Power Manager (SPM) and the
18  Adaptive Voltage Scaling (AVS) hardware. The SPM is a programmable
19  power-controller that transitions a piece of hardware (like a processor or
20  subsystem) into and out of low power modes via a direct connection to
21  the PMIC. It can also be wired up to interact with other processors in the
22  system, notifying them when a low power state is entered or exited.
23
24properties:
25  compatible:
26    items:
27      - enum:
28          - qcom,ipq4019-saw2-cpu
29          - qcom,ipq4019-saw2-l2
30          - qcom,ipq8064-saw2-cpu
31          - qcom,sdm660-gold-saw2-v4.1-l2
32          - qcom,sdm660-silver-saw2-v4.1-l2
33          - qcom,msm8998-gold-saw2-v4.1-l2
34          - qcom,msm8998-silver-saw2-v4.1-l2
35          - qcom,msm8909-saw2-v3.0-cpu
36          - qcom,msm8916-saw2-v3.0-cpu
37          - qcom,msm8939-saw2-v3.0-cpu
38          - qcom,msm8226-saw2-v2.1-cpu
39          - qcom,msm8226-saw2-v2.1-l2
40          - qcom,msm8960-saw2-cpu
41          - qcom,msm8974-saw2-v2.1-cpu
42          - qcom,msm8974-saw2-v2.1-l2
43          - qcom,msm8976-gold-saw2-v2.3-l2
44          - qcom,msm8976-silver-saw2-v2.3-l2
45          - qcom,apq8084-saw2-v2.1-cpu
46          - qcom,apq8084-saw2-v2.1-l2
47          - qcom,apq8064-saw2-v1.1-cpu
48      - const: qcom,saw2
49
50  reg:
51    items:
52      - description: Base address and size of the SPM register region
53      - description: Base address and size of the alias register region
54    minItems: 1
55
56  regulator:
57    $ref: /schemas/regulator/regulator.yaml#
58    description: Indicates that this SPM device acts as a regulator device
59      device for the core (CPU or Cache) the SPM is attached to.
60
61required:
62  - compatible
63  - reg
64
65additionalProperties: false
66
67examples:
68  - |
69
70    /* Example 1: SoC using SAW2 and kpss-acc-v2 CPUIdle */
71    cpus {
72        #address-cells = <1>;
73        #size-cells = <0>;
74
75        cpu@0 {
76            compatible = "qcom,kryo";
77            device_type = "cpu";
78            enable-method = "qcom,kpss-acc-v2";
79            qcom,saw = <&saw0>;
80            reg = <0x0>;
81            operating-points-v2 = <&cpu_opp_table>;
82        };
83    };
84
85    saw0: power-manager@f9089000 {
86        compatible = "qcom,msm8974-saw2-v2.1-cpu", "qcom,saw2";
87        reg = <0xf9089000 0x1000>;
88    };
89
90  - |
91
92    /*
93     * Example 2: New-gen multi cluster SoC using SAW only for L2;
94     * This does not require any cpuidle driver, nor any cpu phandle.
95     */
96    power-manager@17812000 {
97        compatible = "qcom,msm8998-gold-saw2-v4.1-l2", "qcom,saw2";
98        reg = <0x17812000 0x1000>;
99    };
100
101    power-manager@17912000 {
102        compatible = "qcom,msm8998-silver-saw2-v4.1-l2", "qcom,saw2";
103        reg = <0x17912000 0x1000>;
104    };
105
106  - |
107    /*
108     * Example 3: SAW2 with the bundled regulator definition.
109     */
110    power-manager@2089000 {
111        compatible = "qcom,apq8064-saw2-v1.1-cpu", "qcom,saw2";
112        reg = <0x02089000 0x1000>, <0x02009000 0x1000>;
113
114        regulator {
115            regulator-min-microvolt = <850000>;
116            regulator-max-microvolt = <1300000>;
117        };
118    };
119...
120