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[linux-2.6/btrfs-unstable.git] / Documentation / devicetree / bindings / dma / qcom_bam_dma.txt
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1 QCOM BAM DMA controller
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.
17 Example:
19         uart-bam: dma@f9984000 = {
20                 compatible = "qcom,bam-v1.4.0";
21                 reg = <0xf9984000 0x15000>;
22                 interrupts = <0 94 0>;
23                 clocks = <&gcc GCC_BAM_DMA_AHB_CLK>;
24                 clock-names = "bam_clk";
25                 #dma-cells = <1>;
26                 qcom,ee = <0>;
27         };
29 DMA clients must use the format described in the dma.txt file, using a two cell
30 specifier for each channel.
32 Example:
33         serial@f991e000 {
34                 compatible = "qcom,msm-uart";
35                 reg = <0xf991e000 0x1000>
36                         <0xf9944000 0x19000>;
37                 interrupts = <0 108 0>;
38                 clocks = <&gcc GCC_BLSP1_UART2_APPS_CLK>,
39                         <&gcc GCC_BLSP1_AHB_CLK>;
40                 clock-names = "core", "iface";
42                 dmas = <&uart-bam 0>, <&uart-bam 1>;
43                 dma-names = "rx", "tx";
44         };