Documentation/devicetree/bindings/dma/qcom,gpi.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/dma/qcom,gpi.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Qualcomm Technologies Inc GPI DMA controller
   8
   9 maintainers:
  10   - Vinod Koul <vkoul@kernel.org>
  11
  12 description: |
  13   QCOM GPI DMA controller provides DMA capabilities for
  14   peripheral buses such as I2C, UART, and SPI.
  15
  16 allOf:
  17   - $ref: dma-controller.yaml#
  18
  19 properties:
  20   compatible:
  21     oneOf:
  22       - enum:
  23           - qcom,sdm845-gpi-dma
  24           - qcom,sm6350-gpi-dma
  25       - items:
  26           - enum:
  27               - qcom,qdu1000-gpi-dma
  28               - qcom,sc7280-gpi-dma
  29               - qcom,sm6115-gpi-dma
  30               - qcom,sm6375-gpi-dma
  31               - qcom,sm8350-gpi-dma
  32               - qcom,sm8450-gpi-dma
  33               - qcom,sm8550-gpi-dma
  34           - const: qcom,sm6350-gpi-dma
  35       - items:
  36           - enum:
  37               - qcom,sdm670-gpi-dma
  38               - qcom,sm6125-gpi-dma
  39               - qcom,sm8150-gpi-dma
  40               - qcom,sm8250-gpi-dma
  41           - const: qcom,sdm845-gpi-dma
  42
  43   reg:
  44     maxItems: 1
  45
  46   interrupts:
  47     description:
  48       Interrupt lines for each GPI instance
  49     minItems: 1
  50     maxItems: 13
  51
  52   "#dma-cells":
  53     const: 3
  54     description: >
  55       DMA clients must use the format described in dma.txt, giving a phandle
  56       to the DMA controller plus the following 3 integer cells:
  57       - channel: if set to 0xffffffff, any available channel will be allocated
  58         for the client. Otherwise, the exact channel specified will be used.
  59       - seid: serial id of the client as defined in the SoC documentation.
  60       - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h
  61
  62   iommus:
  63     maxItems: 1
  64
  65   dma-channels:
  66     maximum: 31
  67
  68   dma-channel-mask:
  69     maxItems: 1
  70
  71 required:
  72   - compatible
  73   - reg
  74   - interrupts
  75   - "#dma-cells"
  76   - iommus
  77   - dma-channels
  78   - dma-channel-mask
  79
  80 additionalProperties: false
  81
  82 examples:
  83   - |
  84     #include <dt-bindings/interrupt-controller/arm-gic.h>
  85     #include <dt-bindings/dma/qcom-gpi.h>
  86     gpi_dma0: dma-controller@800000 {
  87         compatible = "qcom,sdm845-gpi-dma";
  88         #dma-cells = <3>;
  89         reg = <0x00800000 0x60000>;
  90         iommus = <&apps_smmu 0x0016 0x0>;
  91         dma-channels = <13>;
  92         dma-channel-mask = <0xfa>;
  93         interrupts = <GIC_SPI 244 IRQ_TYPE_LEVEL_HIGH>,
  94                      <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>,
  95                      <GIC_SPI 246 IRQ_TYPE_LEVEL_HIGH>,
  96                      <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>,
  97                      <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>,
  98                      <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>,
  99                      <GIC_SPI 250 IRQ_TYPE_LEVEL_HIGH>,
 100                      <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>,
 101                      <GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH>,
 102                      <GIC_SPI 253 IRQ_TYPE_LEVEL_HIGH>,
 103                      <GIC_SPI 254 IRQ_TYPE_LEVEL_HIGH>,
 104                      <GIC_SPI 255 IRQ_TYPE_LEVEL_HIGH>,
 105                      <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>;
 106     };
 107
 108 ...