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     enum:
  22       - qcom,sdm845-gpi-dma
  23       - qcom,sm8150-gpi-dma
  24
  25   reg:
  26     maxItems: 1
  27
  28   interrupts:
  29     description:
  30       Interrupt lines for each GPI instance
  31     maxItems: 13
  32
  33   "#dma-cells":
  34     const: 3
  35     description: >
  36       DMA clients must use the format described in dma.txt, giving a phandle
  37       to the DMA controller plus the following 3 integer cells:
  38       - channel: if set to 0xffffffff, any available channel will be allocated
  39         for the client. Otherwise, the exact channel specified will be used.
  40       - seid: serial id of the client as defined in the SoC documentation.
  41       - client: type of the client as defined in dt-bindings/dma/qcom-gpi.h
  42
  43   iommus:
  44     maxItems: 1
  45
  46   dma-channels:
  47     maximum: 31
  48
  49   dma-channel-mask:
  50     maxItems: 1
  51
  52 required:
  53   - compatible
  54   - reg
  55   - interrupts
  56   - "#dma-cells"
  57   - iommus
  58   - dma-channels
  59   - dma-channel-mask
  60
  61 additionalProperties: false
  62
  63 examples:
  64   - |
  65     #include <dt-bindings/interrupt-controller/arm-gic.h>
  66     #include <dt-bindings/dma/qcom-gpi.h>
  67     gpi_dma0: dma-controller@800000 {
  68         compatible = "qcom,sdm845-gpi-dma";
  69         #dma-cells = <3>;
  70         reg = <0x00800000 0x60000>;
  71         iommus = <&apps_smmu 0x0016 0x0>;
  72         dma-channels = <13>;
  73         dma-channel-mask = <0xfa>;
  74         interrupts = <GIC_SPI 244 IRQ_TYPE_LEVEL_HIGH>,
  75                      <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>,
  76                      <GIC_SPI 246 IRQ_TYPE_LEVEL_HIGH>,
  77                      <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>,
  78                      <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>,
  79                      <GIC_SPI 249 IRQ_TYPE_LEVEL_HIGH>,
  80                      <GIC_SPI 250 IRQ_TYPE_LEVEL_HIGH>,
  81                      <GIC_SPI 251 IRQ_TYPE_LEVEL_HIGH>,
  82                      <GIC_SPI 252 IRQ_TYPE_LEVEL_HIGH>,
  83                      <GIC_SPI 253 IRQ_TYPE_LEVEL_HIGH>,
  84                      <GIC_SPI 254 IRQ_TYPE_LEVEL_HIGH>,
  85                      <GIC_SPI 255 IRQ_TYPE_LEVEL_HIGH>,
  86                      <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>;
  87     };
  88
  89 ...