70 lines
1.8 KiB
YAML
70 lines
1.8 KiB
YAML
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# 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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$id: http://devicetree.org/schemas/iommu/qcom,tbu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm TBU (Translation Buffer Unit)
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maintainers:
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- Georgi Djakov <quic_c_gdjako@quicinc.com>
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description:
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The Qualcomm SMMU500 implementation consists of TCU and TBU. The TBU contains
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a Translation Lookaside Buffer (TLB) that caches page tables. TBUs provides
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debug features to trace and trigger debug transactions. There are multiple TBU
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instances with each client core.
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properties:
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compatible:
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enum:
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- qcom,sc7280-tbu
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- qcom,sdm845-tbu
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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interconnects:
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maxItems: 1
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power-domains:
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maxItems: 1
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qcom,stream-id-range:
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description: |
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Phandle of a SMMU device and Stream ID range (address and size) that
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is assigned by the TBU
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$ref: /schemas/types.yaml#/definitions/phandle-array
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items:
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- items:
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- description: phandle of a smmu node
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- description: stream id base address
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- description: stream id size
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required:
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- compatible
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- reg
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- qcom,stream-id-range
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/qcom,gcc-sdm845.h>
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#include <dt-bindings/interconnect/qcom,icc.h>
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#include <dt-bindings/interconnect/qcom,sdm845.h>
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tbu@150e1000 {
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compatible = "qcom,sdm845-tbu";
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reg = <0x150e1000 0x1000>;
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clocks = <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>;
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interconnects = <&system_noc MASTER_GNOC_SNOC QCOM_ICC_TAG_ACTIVE_ONLY
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&config_noc SLAVE_IMEM_CFG QCOM_ICC_TAG_ACTIVE_ONLY>;
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power-domains = <&gcc HLOS1_VOTE_AGGRE_NOC_MMU_PCIE_TBU_GDSC>;
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qcom,stream-id-range = <&apps_smmu 0x1c00 0x400>;
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};
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...
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