101 lines
2.2 KiB
YAML
101 lines
2.2 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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$id: http://devicetree.org/schemas/dma/qcom,bam-dma.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Qualcomm Technologies Inc BAM DMA controller
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maintainers:
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- Andy Gross <agross@kernel.org>
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- Bjorn Andersson <andersson@kernel.org>
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allOf:
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- $ref: dma-controller.yaml#
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properties:
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compatible:
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enum:
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# APQ8064, IPQ8064 and MSM8960
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- qcom,bam-v1.3.0
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# MSM8974, APQ8074 and APQ8084
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- qcom,bam-v1.4.0
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# MSM8916 and SDM845
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- qcom,bam-v1.7.0
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: bam_clk
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"#dma-cells":
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const: 1
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interrupts:
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maxItems: 1
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iommus:
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minItems: 1
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maxItems: 4
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num-channels:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Indicates supported number of DMA channels in a remotely controlled bam.
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qcom,controlled-remotely:
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type: boolean
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description:
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Indicates that the bam is controlled by remote proccessor i.e. execution
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environment.
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qcom,ee:
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$ref: /schemas/types.yaml#/definitions/uint32
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minimum: 0
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maximum: 7
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description:
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Indicates the active Execution Environment identifier (0-7) used in the
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secure world.
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qcom,num-ees:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Indicates supported number of Execution Environments in a remotely
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controlled bam.
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qcom,powered-remotely:
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type: boolean
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description:
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Indicates that the bam is powered up by a remote processor but must be
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initialized by the local processor.
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reg:
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maxItems: 1
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required:
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- compatible
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- "#dma-cells"
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- interrupts
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- qcom,ee
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/qcom,gcc-msm8974.h>
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dma-controller@f9944000 {
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compatible = "qcom,bam-v1.4.0";
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reg = <0xf9944000 0x19000>;
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interrupts = <GIC_SPI 239 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&gcc GCC_BLSP2_AHB_CLK>;
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clock-names = "bam_clk";
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#dma-cells = <1>;
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qcom,ee = <0>;
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};
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...
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