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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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a234cffd04
One of the BWMON instances on SM8750 requires that its MMIO space is mapped specifically with the nE memory attribute. Allow the nonposted-mmio property which instructs the OS to do so. Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250716-8750_cpubwmon-v4-1-12212098e90f@oss.qualcomm.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
145 lines
3.8 KiB
YAML
145 lines
3.8 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/interconnect/qcom,msm8998-bwmon.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm Interconnect Bandwidth Monitor
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maintainers:
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- Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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description: |
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Bandwidth Monitor measures current throughput on buses between various NoC
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fabrics and provides information when it crosses configured thresholds.
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Certain SoCs might have more than one Bandwidth Monitors, for example on SDM845::
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- Measuring the bandwidth between CPUs and Last Level Cache Controller -
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called just BWMON,
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- Measuring the bandwidth between Last Level Cache Controller and memory
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(DDR) - called LLCC BWMON.
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properties:
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compatible:
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oneOf:
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- const: qcom,msm8998-bwmon # BWMON v4
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- items:
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- enum:
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- qcom,qcm2290-cpu-bwmon
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- qcom,qcs615-cpu-bwmon
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- qcom,qcs8300-cpu-bwmon
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- qcom,sa8775p-cpu-bwmon
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- qcom,sc7180-cpu-bwmon
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- qcom,sc7280-cpu-bwmon
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- qcom,sc8280xp-cpu-bwmon
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- qcom,sdm845-cpu-bwmon
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- qcom,sm6115-cpu-bwmon
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- qcom,sm6350-llcc-bwmon
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- qcom,sm8250-cpu-bwmon
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- qcom,sm8550-cpu-bwmon
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- qcom,sm8650-cpu-bwmon
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- qcom,sm8750-cpu-bwmon
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- qcom,x1e80100-cpu-bwmon
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- const: qcom,sdm845-bwmon # BWMON v4, unified register space
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- items:
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- enum:
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- qcom,qcs615-llcc-bwmon
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- qcom,qcs8300-llcc-bwmon
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- qcom,sa8775p-llcc-bwmon
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- qcom,sc7180-llcc-bwmon
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- qcom,sc8280xp-llcc-bwmon
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- qcom,sm6350-cpu-bwmon
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- qcom,sm8250-llcc-bwmon
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- qcom,sm8550-llcc-bwmon
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- qcom,sm8650-llcc-bwmon
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- qcom,x1e80100-llcc-bwmon
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- const: qcom,sc7280-llcc-bwmon
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- const: qcom,sc7280-llcc-bwmon # BWMON v5
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- const: qcom,sdm845-llcc-bwmon # BWMON v5
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interconnects:
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maxItems: 1
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interrupts:
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maxItems: 1
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operating-points-v2: true
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opp-table:
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type: object
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reg:
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# BWMON v5 uses one register address space, v1-v4 use one or two.
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minItems: 1
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maxItems: 2
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reg-names:
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minItems: 1
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maxItems: 2
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nonposted-mmio: true
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required:
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- compatible
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- interconnects
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- interrupts
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- operating-points-v2
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- reg
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additionalProperties: false
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allOf:
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- if:
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properties:
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compatible:
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const: qcom,msm8998-bwmon
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then:
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properties:
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reg:
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minItems: 2
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reg-names:
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items:
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- const: monitor
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- const: global
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else:
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properties:
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reg:
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maxItems: 1
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reg-names:
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maxItems: 1
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examples:
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- |
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#include <dt-bindings/interconnect/qcom,sdm845.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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pmu@1436400 {
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compatible = "qcom,sdm845-cpu-bwmon", "qcom,sdm845-bwmon";
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reg = <0x01436400 0x600>;
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interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
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interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
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operating-points-v2 = <&cpu_bwmon_opp_table>;
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cpu_bwmon_opp_table: opp-table {
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compatible = "operating-points-v2";
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opp-0 {
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opp-peak-kBps = <4800000>;
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};
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opp-1 {
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opp-peak-kBps = <9216000>;
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};
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opp-2 {
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opp-peak-kBps = <15052800>;
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};
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opp-3 {
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opp-peak-kBps = <20889600>;
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};
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opp-4 {
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opp-peak-kBps = <25497600>;
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};
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};
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};
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