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Add 'reg' and 'clocks' properties to enable QoS configuration. These properties enable access to QoS registers and necessary clocks for configuration. QoS configuration is essential for ensuring that latency sensitive components such as CPUs and multimedia engines receive prioritized access to memory and interconnect resources. This helps to manage bandwidth and latency across subsystems, improving system responsiveness and performance in concurrent workloads. Both 'reg' and 'clocks' properties are optional. If either is missing, QoS configuration will be skipped. This behavior is controlled by the 'qos_requires_clocks' flag in the driver, which ensures that QoS configuration is bypassed when required clocks are not defined. Signed-off-by: Odelu Kukatla <odelu.kukatla@oss.qualcomm.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/r/20251001073344.6599-2-odelu.kukatla@oss.qualcomm.com Signed-off-by: Georgi Djakov <djakov@kernel.org>
99 lines
2.6 KiB
YAML
99 lines
2.6 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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$id: http://devicetree.org/schemas/interconnect/qcom,sa8775p-rpmh.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm RPMh Network-On-Chip Interconnect on SA8775P
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maintainers:
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- Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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description: |
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RPMh interconnect providers support system bandwidth requirements through
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RPMh hardware accelerators known as Bus Clock Manager (BCM).
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See also: include/dt-bindings/interconnect/qcom,sa8775p.h
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properties:
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compatible:
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enum:
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- qcom,sa8775p-aggre1-noc
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- qcom,sa8775p-aggre2-noc
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- qcom,sa8775p-clk-virt
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- qcom,sa8775p-config-noc
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- qcom,sa8775p-dc-noc
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- qcom,sa8775p-gem-noc
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- qcom,sa8775p-gpdsp-anoc
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- qcom,sa8775p-lpass-ag-noc
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- qcom,sa8775p-mc-virt
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- qcom,sa8775p-mmss-noc
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- qcom,sa8775p-nspa-noc
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- qcom,sa8775p-nspb-noc
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- qcom,sa8775p-pcie-anoc
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- qcom,sa8775p-system-noc
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reg:
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maxItems: 1
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clocks:
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minItems: 2
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maxItems: 5
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required:
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- compatible
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allOf:
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- $ref: qcom,rpmh-common.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- qcom,sa8775p-aggre1-noc
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then:
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properties:
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clocks:
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items:
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- description: aggre UFS PHY AXI clock
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- description: aggre QUP PRIM AXI clock
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- description: aggre USB2 PRIM AXI clock
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- description: aggre USB3 PRIM AXI clock
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- description: aggre USB3 SEC AXI clock
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- if:
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properties:
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compatible:
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contains:
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enum:
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- qcom,sa8775p-aggre2-noc
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then:
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properties:
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clocks:
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items:
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- description: aggre UFS CARD AXI clock
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- description: RPMH CC IPA clock
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/qcom,sa8775p-gcc.h>
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clk_virt: interconnect-clk-virt {
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compatible = "qcom,sa8775p-clk-virt";
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#interconnect-cells = <2>;
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qcom,bcm-voters = <&apps_bcm_voter>;
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};
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aggre1_noc: interconnect@16c0000 {
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compatible = "qcom,sa8775p-aggre1-noc";
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reg = <0x016c0000 0x18080>;
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#interconnect-cells = <2>;
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qcom,bcm-voters = <&apps_bcm_voter>;
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clocks = <&gcc GCC_AGGRE_UFS_PHY_AXI_CLK>,
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<&gcc GCC_AGGRE_NOC_QUPV3_AXI_CLK>,
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<&gcc GCC_AGGRE_USB2_PRIM_AXI_CLK>,
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<&gcc GCC_AGGRE_USB3_PRIM_AXI_CLK>,
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<&gcc GCC_AGGRE_USB3_SEC_AXI_CLK>;
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};
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