Documentation/devicetree/bindings/dma/qcom_bam_dma.txt

   1 QCOM BAM DMA controller
   2
   3 Required properties:
   4 - compatible: must be one of the following:
   5  * "qcom,bam-v1.4.0" for MSM8974, APQ8074 and APQ8084
   6  * "qcom,bam-v1.3.0" for APQ8064, IPQ8064 and MSM8960
   7  * "qcom,bam-v1.7.0" for MSM8916
   8 - reg: Address range for DMA registers
   9 - interrupts: Should contain the one interrupt shared by all channels
  10 - #dma-cells: must be <1>, the cell in the dmas property of the client device
  11   represents the channel number
  12 - clocks: required clock
  13 - clock-names: must contain "bam_clk" entry
  14 - qcom,ee : indicates the active Execution Environment identifier (0-7) used in
  15   the secure world.
  16 - qcom,controlled-remotely : optional, indicates that the bam is controlled by
  17   remote proccessor i.e. execution environment.
  18 - num-channels : optional, indicates supported number of DMA channels in a
  19   remotely controlled bam.
  20 - qcom,num-ees : optional, indicates supported number of Execution Environments
  21   in a remotely controlled bam.
  22
  23 Example:
  24
  25         uart-bam: dma@f9984000 = {
  26                 compatible = "qcom,bam-v1.4.0";
  27                 reg = <0xf9984000 0x15000>;
  28                 interrupts = <0 94 0>;
  29                 clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
  30                 clock-names = "bam_clk";
  31                 #dma-cells = <1>;
  32                 qcom,ee = <0>;
  33         };
  34
  35 DMA clients must use the format described in the dma.txt file, using a two cell
  36 specifier for each channel.
  37
  38 Example:
  39         serial@f991e000 {
  40                 compatible = "qcom,msm-uart";
  41                 reg = <0xf991e000 0x1000>
  42                         <0xf9944000 0x19000>;
  43                 interrupts = <0 108 0>;
  44                 clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
  45                         <&gcc GCC_BLSP1_AHB_CLK>;
  46                 clock-names = "core", "iface";
  47
  48                 dmas = <&uart-bam 0>, <&uart-bam 1>;
  49                 dma-names = "rx", "tx";
  50         };