1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/interconnect/qcom,msm8998-bwmon.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Qualcomm Interconnect Bandwidth Monitor
8
9 maintainers:
10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
11
12 description: |
13 Bandwidth Monitor measures current throughput on buses between various NoC
14 fabrics and provides information when it crosses configured thresholds.
15
16 Certain SoCs might have more than one Bandwidth Monitors, for example on SDM845::
17 - Measuring the bandwidth between CPUs and Last Level Cache Controller -
18 called just BWMON,
19 - Measuring the bandwidth between Last Level Cache Controller and memory
20 (DDR) - called LLCC BWMON.
21
22 properties:
23 compatible:
24 oneOf:
25 - const: qcom,msm8998-bwmon # BWMON v4
26 - items:
27 - enum:
28 - qcom,qcm2290-cpu-bwmon
29 - qcom,sa8775p-cpu-bwmon
30 - qcom,sc7180-cpu-bwmon
31 - qcom,sc7280-cpu-bwmon
32 - qcom,sc8280xp-cpu-bwmon
33 - qcom,sdm845-cpu-bwmon
34 - qcom,sm6115-cpu-bwmon
35 - qcom,sm6350-llcc-bwmon
36 - qcom,sm8250-cpu-bwmon
37 - qcom,sm8550-cpu-bwmon
38 - qcom,sm8650-cpu-bwmon
39 - qcom,x1e80100-cpu-bwmon
40 - const: qcom,sdm845-bwmon # BWMON v4, unified register space
41 - items:
42 - enum:
43 - qcom,sa8775p-llcc-bwmon
44 - qcom,sc7180-llcc-bwmon
45 - qcom,sc8280xp-llcc-bwmon
46 - qcom,sm6350-cpu-bwmon
47 - qcom,sm8250-llcc-bwmon
48 - qcom,sm8550-llcc-bwmon
49 - qcom,sm8650-llcc-bwmon
50 - qcom,x1e80100-llcc-bwmon
51 - const: qcom,sc7280-llcc-bwmon
52 - const: qcom,sc7280-llcc-bwmon # BWMON v5
53 - const: qcom,sdm845-llcc-bwmon # BWMON v5
54
55 interconnects:
56 maxItems: 1
57
58 interrupts:
59 maxItems: 1
60
61 operating-points-v2: true
62 opp-table:
63 type: object
64
65 reg:
66 # BWMON v5 uses one register address space, v1-v4 use one or two.
67 minItems: 1
68 maxItems: 2
69
70 reg-names:
71 minItems: 1
72 maxItems: 2
73
74 required:
75 - compatible
76 - interconnects
77 - interrupts
78 - operating-points-v2
79 - reg
80
81 additionalProperties: false
82
83 allOf:
84 - if:
85 properties:
86 compatible:
87 const: qcom,msm8998-bwmon
88 then:
89 properties:
90 reg:
91 minItems: 2
92
93 reg-names:
94 items:
95 - const: monitor
96 - const: global
97
98 else:
99 properties:
100 reg:
101 maxItems: 1
102
103 reg-names:
104 maxItems: 1
105
106 examples:
107 - |
108 #include <dt-bindings/interconnect/qcom,sdm845.h>
109 #include <dt-bindings/interrupt-controller/arm-gic.h>
110
111 pmu@1436400 {
112 compatible = "qcom,sdm845-cpu-bwmon", "qcom,sdm845-bwmon";
113 reg = <0x01436400 0x600>;
114 interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
115 interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
116
117 operating-points-v2 = <&cpu_bwmon_opp_table>;
118
119 cpu_bwmon_opp_table: opp-table {
120 compatible = "operating-points-v2";
121 opp-0 {
122 opp-peak-kBps = <4800000>;
123 };
124 opp-1 {
125 opp-peak-kBps = <9216000>;
126 };
127 opp-2 {
128 opp-peak-kBps = <15052800>;
129 };
130 opp-3 {
131 opp-peak-kBps = <20889600>;
132 };
133 opp-4 {
134 opp-peak-kBps = <25497600>;
135 };
136 };
137 };
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