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Diffstat (limited to 'Documentation/devicetree/bindings/iommu/qcom,tbu.yaml')
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1 files changed, 69 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml b/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml new file mode 100644 index 000000000000..82dfe935573e --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml @@ -0,0 +1,69 @@ +# 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>; + }; +... |