tjh.dev
Linux kernel mirror (for testing)
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linux
1* NVIDIA Tegra Audio DMA (ADMA) controller
2
3The Tegra Audio DMA controller that is used for transferring data
4between system memory and the Audio Processing Engine (APE).
5
6Required 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
24Example:
25
26adma: 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};