target/linux/ipq806x/patches/0044-dmaengine-qcom_bam_dma-Add-device-tree-binding.patch

   1 From b5e19b657e352d565c5ddeae5f6dfd542de9d7e5 Mon Sep 17 00:00:00 2001
   2 From: Andy Gross <agross@codeaurora.org>
   3 Date: Mon, 10 Mar 2014 16:40:19 -0500
   4 Subject: [PATCH 044/182] dmaengine: qcom_bam_dma: Add device tree binding
   5
   6 Add device tree binding support for the QCOM BAM DMA driver.
   7
   8 Acked-by: Kumar Gala <galak@codeaurora.org>
   9 Signed-off-by: Andy Gross <agross@codeaurora.org>
  10 Signed-off-by: Vinod Koul <vinod.koul@intel.com>
  11 ---
  12  .../devicetree/bindings/dma/qcom_bam_dma.txt       |   41 ++++++++++++++++++++
  13  1 file changed, 41 insertions(+)
  14  create mode 100644 Documentation/devicetree/bindings/dma/qcom_bam_dma.txt
  15
  16 diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt
  17 new file mode 100644
  18 index 0000000..d75a9d7
  19 --- /dev/null
  20 +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt
  21 @@ -0,0 +1,41 @@
  22 +QCOM BAM DMA controller
  23 +
  24 +Required properties:
  25 +- compatible: must contain "qcom,bam-v1.4.0" for MSM8974
  26 +- reg: Address range for DMA registers
  27 +- interrupts: Should contain the one interrupt shared by all channels
  28 +- #dma-cells: must be <1>, the cell in the dmas property of the client device
  29 +  represents the channel number
  30 +- clocks: required clock
  31 +- clock-names: must contain "bam_clk" entry
  32 +- qcom,ee : indicates the active Execution Environment identifier (0-7) used in
  33 +  the secure world.
  34 +
  35 +Example:
  36 +
  37 +       uart-bam: dma@f9984000 = {
  38 +               compatible = "qcom,bam-v1.4.0";
  39 +               reg = <0xf9984000 0x15000>;
  40 +               interrupts = <0 94 0>;
  41 +               clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
  42 +               clock-names = "bam_clk";
  43 +               #dma-cells = <1>;
  44 +               qcom,ee = <0>;
  45 +       };
  46 +
  47 +DMA clients must use the format described in the dma.txt file, using a two cell
  48 +specifier for each channel.
  49 +
  50 +Example:
  51 +       serial@f991e000 {
  52 +               compatible = "qcom,msm-uart";
  53 +               reg = <0xf991e000 0x1000>
  54 +                       <0xf9944000 0x19000>;
  55 +               interrupts = <0 108 0>;
  56 +               clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
  57 +                       <&gcc GCC_BLSP1_AHB_CLK>;
  58 +               clock-names = "core", "iface";
  59 +
  60 +               dmas = <&uart-bam 0>, <&uart-bam 1>;
  61 +               dma-names = "rx", "tx";
  62 +       };
  63 --
  64 1.7.10.4
  65