Add bindings for the Qualcomm Bandwidth Monitor device providing performance data on interconnects. The bindings describe only BWMON CPU (version 4), e.g. the instance which appeared for the first on Qualcomm MSM8998 SoC and is also used on SDM845. This BWMON device sits between CPU and Last Level Cache Controller. Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> Reviewed-by: Rob Herring <robh@xxxxxxxxxx> Acked-by: Georgi Djakov <djakov@xxxxxxxxxx> --- .../interconnect/qcom,msm8998-cpu-bwmon.yaml | 80 +++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/qcom,msm8998-cpu-bwmon.yaml diff --git a/Documentation/devicetree/bindings/interconnect/qcom,msm8998-cpu-bwmon.yaml b/Documentation/devicetree/bindings/interconnect/qcom,msm8998-cpu-bwmon.yaml new file mode 100644 index 000000000000..b6ced53b92f7 --- /dev/null +++ b/Documentation/devicetree/bindings/interconnect/qcom,msm8998-cpu-bwmon.yaml @@ -0,0 +1,80 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/interconnect/qcom,msm8998-cpu-bwmon.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Interconnect Bandwidth Monitor + +maintainers: + - Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> + +description: + Bandwidth Monitor measures current throughput on buses between various NoC + fabrics and provides information when it crosses configured thresholds. + +properties: + compatible: + oneOf: + - items: + - enum: + - qcom,sdm845-cpu-bwmon + - const: qcom,msm8998-cpu-bwmon + - const: qcom,msm8998-cpu-bwmon # BWMON v4 + + interconnects: + maxItems: 1 + + interrupts: + maxItems: 1 + + operating-points-v2: true + opp-table: true + + reg: + # Currently described BWMON v4 and v5 use one register address space. + # BWMON v2 uses two register spaces - not yet described. + maxItems: 1 + +required: + - compatible + - interconnects + - interrupts + - operating-points-v2 + - opp-table + - reg + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interconnect/qcom,sdm845.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + + pmu@1436400 { + compatible = "qcom,sdm845-cpu-bwmon", "qcom,msm8998-cpu-bwmon"; + reg = <0x01436400 0x600>; + interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>; + interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>; + + operating-points-v2 = <&cpu_bwmon_opp_table>; + + cpu_bwmon_opp_table: opp-table { + compatible = "operating-points-v2"; + opp-0 { + opp-peak-kBps = <4800000>; + }; + opp-1 { + opp-peak-kBps = <9216000>; + }; + opp-2 { + opp-peak-kBps = <15052800>; + }; + opp-3 { + opp-peak-kBps = <20889600>; + }; + opp-4 { + opp-peak-kBps = <25497600>; + }; + }; + }; -- 2.34.1
