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-rw-r--r-- | Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml | 104 |
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diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml new file mode 100644 index 000000000..2bae06eed --- /dev/null +++ b/Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml @@ -0,0 +1,104 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/arm,coresight-catu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Arm Coresight Address Translation Unit (CATU) + +maintainers: + - Mathieu Poirier <mathieu.poirier@linaro.org> + - Mike Leach <mike.leach@linaro.org> + - Leo Yan <leo.yan@linaro.org> + - Suzuki K Poulose <suzuki.poulose@arm.com> + +description: | + CoreSight components are compliant with the ARM CoreSight architecture + specification and can be connected in various topologies to suit a particular + SoCs tracing needs. These trace components can generally be classified as + sinks, links and sources. Trace data produced by one or more sources flows + through the intermediate links connecting the source to the currently selected + sink. + + The CoreSight Address Translation Unit (CATU) translates addresses between an + AXI master and system memory. The CATU is normally used along with the TMC to + implement scattering of virtual trace buffers in physical memory. The CATU + translates contiguous Virtual Addresses (VAs) from an AXI master into + non-contiguous Physical Addresses (PAs) that are intended for system memory. + +# Need a custom select here or 'arm,primecell' will match on lots of nodes +select: + properties: + compatible: + contains: + const: arm,coresight-catu + required: + - compatible + +allOf: + - $ref: /schemas/arm/primecell.yaml# + +properties: + compatible: + items: + - const: arm,coresight-catu + - const: arm,primecell + + reg: + maxItems: 1 + + clocks: + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + items: + - const: apb_pclk + - const: atclk + + interrupts: + maxItems: 1 + description: Address translation error interrupt + + power-domains: + maxItems: 1 + + in-ports: + $ref: /schemas/graph.yaml#/properties/ports + additionalProperties: false + + properties: + port: + description: AXI Slave connected to another Coresight component + $ref: /schemas/graph.yaml#/properties/port + +required: + - compatible + - reg + - clocks + - clock-names + - in-ports + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + catu@207e0000 { + compatible = "arm,coresight-catu", "arm,primecell"; + reg = <0x207e0000 0x1000>; + + clocks = <&oscclk6a>; + clock-names = "apb_pclk"; + + interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>; + in-ports { + port { + catu_in_port: endpoint { + remote-endpoint = <&etr_out_port>; + }; + }; + }; + }; +... |