| Tom Rini | 762f85b | 2024-07-20 11:15:10 -0600 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/iommu/qcom,tbu.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Qualcomm TBU (Translation Buffer Unit) |
| 8 | |
| 9 | maintainers: |
| 10 | - Georgi Djakov <quic_c_gdjako@quicinc.com> |
| 11 | |
| 12 | description: |
| 13 | The Qualcomm SMMU500 implementation consists of TCU and TBU. The TBU contains |
| 14 | a Translation Lookaside Buffer (TLB) that caches page tables. TBUs provides |
| 15 | debug features to trace and trigger debug transactions. There are multiple TBU |
| 16 | instances with each client core. |
| 17 | |
| 18 | properties: |
| 19 | compatible: |
| 20 | enum: |
| 21 | - qcom,sc7280-tbu |
| 22 | - qcom,sdm845-tbu |
| 23 | |
| 24 | reg: |
| 25 | maxItems: 1 |
| 26 | |
| 27 | clocks: |
| 28 | maxItems: 1 |
| 29 | |
| 30 | interconnects: |
| 31 | maxItems: 1 |
| 32 | |
| 33 | power-domains: |
| 34 | maxItems: 1 |
| 35 | |
| 36 | qcom,stream-id-range: |
| 37 | description: | |
| 38 | Phandle of a SMMU device and Stream ID range (address and size) that |
| 39 | is assigned by the TBU |
| 40 | $ref: /schemas/types.yaml#/definitions/phandle-array |
| 41 | items: |
| 42 | - items: |
| 43 | - description: phandle of a smmu node |
| 44 | - description: stream id base address |
| 45 | - description: stream id size |
| 46 | |
| 47 | required: |
| 48 | - compatible |
| 49 | - reg |
| 50 | - qcom,stream-id-range |
| 51 | |
| 52 | additionalProperties: false |
| 53 | |
| 54 | examples: |
| 55 | - | |
| 56 | #include <dt-bindings/clock/qcom,gcc-sdm845.h> |
| 57 | #include <dt-bindings/interconnect/qcom,icc.h> |
| 58 | #include <dt-bindings/interconnect/qcom,sdm845.h> |
| 59 | |
| 60 | tbu@150e1000 { |
| 61 | compatible = "qcom,sdm845-tbu"; |
| 62 | reg = <0x150e1000 0x1000>; |
| 63 | clocks = <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>; |
| 64 | interconnects = <&system_noc MASTER_GNOC_SNOC QCOM_ICC_TAG_ACTIVE_ONLY |
| 65 | &config_noc SLAVE_IMEM_CFG QCOM_ICC_TAG_ACTIVE_ONLY>; |
| 66 | power-domains = <&gcc HLOS1_VOTE_AGGRE_NOC_MMU_PCIE_TBU_GDSC>; |
| 67 | qcom,stream-id-range = <&apps_smmu 0x1c00 0x400>; |
| 68 | }; |
| 69 | ... |