Documentation/devicetree/bindings/dma/qcom_bam_dma.txt

   1 QCOM BAM DMA controller
   2
   3 Required properties:
   4 - compatible: must contain "qcom,bam-v1.4.0" for MSM8974
   5 - reg: Address range for DMA registers
   6 - interrupts: Should contain the one interrupt shared by all channels
   7 - #dma-cells: must be <1>, the cell in the dmas property of the client device
   8   represents the channel number
   9 - clocks: required clock
  10 - clock-names: must contain "bam_clk" entry
  11 - qcom,ee : indicates the active Execution Environment identifier (0-7) used in
  12   the secure world.
  13
  14 Example:
  15
  16         uart-bam: dma@f9984000 = {
  17                 compatible = "qcom,bam-v1.4.0";
  18                 reg = <0xf9984000 0x15000>;
  19                 interrupts = <0 94 0>;
  20                 clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
  21                 clock-names = "bam_clk";
  22                 #dma-cells = <1>;
  23                 qcom,ee = <0>;
  24         };
  25
  26 DMA clients must use the format described in the dma.txt file, using a two cell
  27 specifier for each channel.
  28
  29 Example:
  30         serial@f991e000 {
  31                 compatible = "qcom,msm-uart";
  32                 reg = <0xf991e000 0x1000>
  33                         <0xf9944000 0x19000>;
  34                 interrupts = <0 108 0>;
  35                 clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
  36                         <&gcc GCC_BLSP1_AHB_CLK>;
  37                 clock-names = "core", "iface";
  38
  39                 dmas = <&uart-bam 0>, <&uart-bam 1>;
  40                 dma-names = "rx", "tx";
  41         };