| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/iommu/qcom,tbu.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Qualcomm TBU (Translation Buffer Unit) |
| |
| maintainers: |
| - Georgi Djakov <quic_c_gdjako@quicinc.com> |
| |
| description: |
| The Qualcomm SMMU500 implementation consists of TCU and TBU. The TBU contains |
| a Translation Lookaside Buffer (TLB) that caches page tables. TBUs provides |
| debug features to trace and trigger debug transactions. There are multiple TBU |
| instances with each client core. |
| |
| properties: |
| compatible: |
| enum: |
| - qcom,sc7280-tbu |
| - qcom,sdm845-tbu |
| |
| reg: |
| maxItems: 1 |
| |
| clocks: |
| maxItems: 1 |
| |
| interconnects: |
| maxItems: 1 |
| |
| power-domains: |
| maxItems: 1 |
| |
| qcom,stream-id-range: |
| description: | |
| Phandle of a SMMU device and Stream ID range (address and size) that |
| is assigned by the TBU |
| $ref: /schemas/types.yaml#/definitions/phandle-array |
| items: |
| - items: |
| - description: phandle of a smmu node |
| - description: stream id base address |
| - description: stream id size |
| |
| required: |
| - compatible |
| - reg |
| - qcom,stream-id-range |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/clock/qcom,gcc-sdm845.h> |
| #include <dt-bindings/interconnect/qcom,icc.h> |
| #include <dt-bindings/interconnect/qcom,sdm845.h> |
| |
| tbu@150e1000 { |
| compatible = "qcom,sdm845-tbu"; |
| reg = <0x150e1000 0x1000>; |
| clocks = <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>; |
| interconnects = <&system_noc MASTER_GNOC_SNOC QCOM_ICC_TAG_ACTIVE_ONLY |
| &config_noc SLAVE_IMEM_CFG QCOM_ICC_TAG_ACTIVE_ONLY>; |
| power-domains = <&gcc HLOS1_VOTE_AGGRE_NOC_MMU_PCIE_TBU_GDSC>; |
| qcom,stream-id-range = <&apps_smmu 0x1c00 0x400>; |
| }; |
| ... |
