qcom,msm8998-bwmon.yaml

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    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       - items:
   26           - enum:
   27               - qcom,sdm845-bwmon
   28           - const: qcom,msm8998-bwmon
   29       - const: qcom,msm8998-bwmon       # BWMON v4
   30 
   31   interconnects:
   32     maxItems: 1
   33 
   34   interrupts:
   35     maxItems: 1
   36 
   37   operating-points-v2: true
   38   opp-table: true
   39 
   40   reg:
   41     # BWMON v4 (currently described) and BWMON v5 use one register address
   42     # space.  BWMON v2 uses two register spaces - not yet described.
   43     maxItems: 1
   44 
   45 required:
   46   - compatible
   47   - interconnects
   48   - interrupts
   49   - operating-points-v2
   50   - opp-table
   51   - reg
   52 
   53 additionalProperties: false
   54 
   55 examples:
   56   - |
   57     #include <dt-bindings/interconnect/qcom,sdm845.h>
   58     #include <dt-bindings/interrupt-controller/arm-gic.h>
   59 
   60     pmu@1436400 {
   61         compatible = "qcom,sdm845-bwmon", "qcom,msm8998-bwmon";
   62         reg = <0x01436400 0x600>;
   63         interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
   64         interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
   65 
   66         operating-points-v2 = <&cpu_bwmon_opp_table>;
   67 
   68         cpu_bwmon_opp_table: opp-table {
   69             compatible = "operating-points-v2";
   70             opp-0 {
   71                 opp-peak-kBps = <4800000>;
   72             };
   73             opp-1 {
   74                 opp-peak-kBps = <9216000>;
   75             };
   76             opp-2 {
   77                 opp-peak-kBps = <15052800>;
   78             };
   79             opp-3 {
   80                 opp-peak-kBps = <20889600>;
   81             };
   82             opp-4 {
   83                 opp-peak-kBps = <25497600>;
   84             };
   85         };
   86     };

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sys/contrib/device-tree/Bindings/interconnect/qcom,msm8998-bwmon.yaml