| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 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,sc7180-cpu-bwmon |
| 29 | - qcom,sc7280-cpu-bwmon |
| 30 | - qcom,sc8280xp-cpu-bwmon |
| 31 | - qcom,sdm845-cpu-bwmon |
| 32 | - qcom,sm6350-llcc-bwmon |
| 33 | - qcom,sm8250-cpu-bwmon |
| 34 | - qcom,sm8550-cpu-bwmon |
| 35 | - const: qcom,sdm845-bwmon # BWMON v4, unified register space |
| 36 | - items: |
| 37 | - enum: |
| 38 | - qcom,sc7180-llcc-bwmon |
| 39 | - qcom,sc8280xp-llcc-bwmon |
| 40 | - qcom,sm6350-cpu-bwmon |
| 41 | - qcom,sm8250-llcc-bwmon |
| 42 | - qcom,sm8550-llcc-bwmon |
| 43 | - const: qcom,sc7280-llcc-bwmon |
| 44 | - const: qcom,sc7280-llcc-bwmon # BWMON v5 |
| 45 | - const: qcom,sdm845-llcc-bwmon # BWMON v5 |
| 46 | |
| 47 | interconnects: |
| 48 | maxItems: 1 |
| 49 | |
| 50 | interrupts: |
| 51 | maxItems: 1 |
| 52 | |
| 53 | operating-points-v2: true |
| 54 | opp-table: |
| 55 | type: object |
| 56 | |
| 57 | reg: |
| 58 | # BWMON v5 uses one register address space, v1-v4 use one or two. |
| 59 | minItems: 1 |
| 60 | maxItems: 2 |
| 61 | |
| 62 | reg-names: |
| 63 | minItems: 1 |
| 64 | maxItems: 2 |
| 65 | |
| 66 | required: |
| 67 | - compatible |
| 68 | - interconnects |
| 69 | - interrupts |
| 70 | - operating-points-v2 |
| 71 | - opp-table |
| 72 | - reg |
| 73 | |
| 74 | additionalProperties: false |
| 75 | |
| 76 | allOf: |
| 77 | - if: |
| 78 | properties: |
| 79 | compatible: |
| 80 | const: qcom,msm8998-bwmon |
| 81 | then: |
| 82 | properties: |
| 83 | reg: |
| 84 | minItems: 2 |
| 85 | |
| 86 | reg-names: |
| 87 | items: |
| 88 | - const: monitor |
| 89 | - const: global |
| 90 | |
| 91 | else: |
| 92 | properties: |
| 93 | reg: |
| 94 | maxItems: 1 |
| 95 | |
| 96 | reg-names: |
| 97 | maxItems: 1 |
| 98 | |
| 99 | examples: |
| 100 | - | |
| 101 | #include <dt-bindings/interconnect/qcom,sdm845.h> |
| 102 | #include <dt-bindings/interrupt-controller/arm-gic.h> |
| 103 | |
| 104 | pmu@1436400 { |
| 105 | compatible = "qcom,sdm845-cpu-bwmon", "qcom,sdm845-bwmon"; |
| 106 | reg = <0x01436400 0x600>; |
| 107 | interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>; |
| 108 | interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>; |
| 109 | |
| 110 | operating-points-v2 = <&cpu_bwmon_opp_table>; |
| 111 | |
| 112 | cpu_bwmon_opp_table: opp-table { |
| 113 | compatible = "operating-points-v2"; |
| 114 | opp-0 { |
| 115 | opp-peak-kBps = <4800000>; |
| 116 | }; |
| 117 | opp-1 { |
| 118 | opp-peak-kBps = <9216000>; |
| 119 | }; |
| 120 | opp-2 { |
| 121 | opp-peak-kBps = <15052800>; |
| 122 | }; |
| 123 | opp-3 { |
| 124 | opp-peak-kBps = <20889600>; |
| 125 | }; |
| 126 | opp-4 { |
| 127 | opp-peak-kBps = <25497600>; |
| 128 | }; |
| 129 | }; |
| 130 | }; |