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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/dma/qcom,bam-dma.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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    oneOf:

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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, SDM630

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          - qcom,bam-v1.7.0

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      - items:

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          - enum:

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              # SDM845, SM6115, SM8150, SM8250 and QCM2290

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              - qcom,bam-v1.7.4

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          - const: 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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  dma-coherent: true

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  iommus:

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    minItems: 1

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    maxItems: 6

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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 processor 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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anyOf:

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  - required:

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      - qcom,powered-remotely

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  - required:

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      - qcom,controlled-remotely

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  - required:

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      - clocks

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      - clock-names

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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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