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-rw-r--r-- | Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.txt | 55 |
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diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.txt b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.txt new file mode 100644 index 000000000000..1e1dc8f972e4 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/nvidia,tegra210-adma.txt | |||
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1 | * NVIDIA Tegra Audio DMA (ADMA) controller | ||
2 | |||
3 | The Tegra Audio DMA controller that is used for transferring data | ||
4 | between system memory and the Audio Processing Engine (APE). | ||
5 | |||
6 | Required properties: | ||
7 | - compatible: Must be "nvidia,tegra210-adma". | ||
8 | - reg: Should contain DMA registers location and length. This should be | ||
9 | a single entry that includes all of the per-channel registers in one | ||
10 | contiguous bank. | ||
11 | - interrupt-parent: Phandle to the interrupt parent controller. | ||
12 | - interrupts: Should contain all of the per-channel DMA interrupts in | ||
13 | ascending order with respect to the DMA channel index. | ||
14 | - clocks: Must contain one entry for the ADMA module clock | ||
15 | (TEGRA210_CLK_D_AUDIO). | ||
16 | - clock-names: Must contain the name "d_audio" for the corresponding | ||
17 | 'clocks' entry. | ||
18 | - #dma-cells : Must be 1. The first cell denotes the receive/transmit | ||
19 | request number and should be between 1 and the maximum number of | ||
20 | requests supported. This value corresponds to the RX/TX_REQUEST_SELECT | ||
21 | fields in the ADMA_CHn_CTRL register. | ||
22 | |||
23 | |||
24 | Example: | ||
25 | |||
26 | adma: dma@702e2000 { | ||
27 | compatible = "nvidia,tegra210-adma"; | ||
28 | reg = <0x0 0x702e2000 0x0 0x2000>; | ||
29 | interrupt-parent = <&tegra_agic>; | ||
30 | interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>, | ||
31 | <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>, | ||
32 | <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>, | ||
33 | <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>, | ||
34 | <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>, | ||
35 | <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>, | ||
36 | <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>, | ||
37 | <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>, | ||
38 | <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>, | ||
39 | <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>, | ||
40 | <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>, | ||
41 | <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>, | ||
42 | <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>, | ||
43 | <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>, | ||
44 | <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>, | ||
45 | <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>, | ||
46 | <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>, | ||
47 | <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>, | ||
48 | <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>, | ||
49 | <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>, | ||
50 | <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>, | ||
51 | <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>; | ||
52 | clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>; | ||
53 | clock-names = "d_audio"; | ||
54 | #dma-cells = <1>; | ||
55 | }; | ||