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-rw-r--r-- | Documentation/devicetree/bindings/dma/qcom_bam_dma.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt new file mode 100644 index 000000000000..d75a9d767022 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qcom_bam_dma.txt | |||
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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 | }; | ||