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-rw-r--r--Documentation/devicetree/bindings/dma/qcom_bam_dma.txt41
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1QCOM BAM DMA controller
2
3Required 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
14Example:
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
26DMA clients must use the format described in the dma.txt file, using a two cell
27specifier for each channel.
28
29Example:
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 };