0001 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/interconnect/qcom,msm8998-bwmon.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Qualcomm Interconnect Bandwidth Monitor
0008
0009 maintainers:
0010 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
0011
0012 description: |
0013 Bandwidth Monitor measures current throughput on buses between various NoC
0014 fabrics and provides information when it crosses configured thresholds.
0015
0016 Certain SoCs might have more than one Bandwidth Monitors, for example on SDM845::
0017 - Measuring the bandwidth between CPUs and Last Level Cache Controller -
0018 called just BWMON,
0019 - Measuring the bandwidth between Last Level Cache Controller and memory
0020 (DDR) - called LLCC BWMON.
0021
0022 properties:
0023 compatible:
0024 oneOf:
0025 - items:
0026 - enum:
0027 - qcom,sdm845-bwmon
0028 - const: qcom,msm8998-bwmon
0029 - const: qcom,msm8998-bwmon # BWMON v4
0030
0031 interconnects:
0032 maxItems: 1
0033
0034 interrupts:
0035 maxItems: 1
0036
0037 operating-points-v2: true
0038 opp-table: true
0039
0040 reg:
0041 # BWMON v4 (currently described) and BWMON v5 use one register address
0042 # space. BWMON v2 uses two register spaces - not yet described.
0043 maxItems: 1
0044
0045 required:
0046 - compatible
0047 - interconnects
0048 - interrupts
0049 - operating-points-v2
0050 - opp-table
0051 - reg
0052
0053 additionalProperties: false
0054
0055 examples:
0056 - |
0057 #include <dt-bindings/interconnect/qcom,sdm845.h>
0058 #include <dt-bindings/interrupt-controller/arm-gic.h>
0059
0060 pmu@1436400 {
0061 compatible = "qcom,sdm845-bwmon", "qcom,msm8998-bwmon";
0062 reg = <0x01436400 0x600>;
0063 interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
0064 interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
0065
0066 operating-points-v2 = <&cpu_bwmon_opp_table>;
0067
0068 cpu_bwmon_opp_table: opp-table {
0069 compatible = "operating-points-v2";
0070 opp-0 {
0071 opp-peak-kBps = <4800000>;
0072 };
0073 opp-1 {
0074 opp-peak-kBps = <9216000>;
0075 };
0076 opp-2 {
0077 opp-peak-kBps = <15052800>;
0078 };
0079 opp-3 {
0080 opp-peak-kBps = <20889600>;
0081 };
0082 opp-4 {
0083 opp-peak-kBps = <25497600>;
0084 };
0085 };
0086 };
