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* NVIDIA Tegra Audio DMA (ADMA) controller

The Tegra Audio DMA controller that is used for transferring data
between system memory and the Audio Processing Engine (APE).

Required properties:
- compatible: Should contain one of the following:
  - "nvidia,tegra210-adma": for Tegra210
  - "nvidia,tegra186-adma": for Tegra186 and Tegra194
- reg: Should contain DMA registers location and length. This should be
  a single entry that includes all of the per-channel registers in one
  contiguous bank.
- interrupts: Should contain all of the per-channel DMA interrupts in
  ascending order with respect to the DMA channel index.
- clocks: Must contain one entry for the ADMA module clock
  (TEGRA210_CLK_D_AUDIO).
- clock-names: Must contain the name "d_audio" for the corresponding
  'clocks' entry.
- #dma-cells : Must be 1. The first cell denotes the receive/transmit
  request number and should be between 1 and the maximum number of
  requests supported. This value corresponds to the RX/TX_REQUEST_SELECT
  fields in the ADMA_CHn_CTRL register.


Example:

adma: dma@702e2000 {
	compatible = "nvidia,tegra210-adma";
	reg = <0x0 0x702e2000 0x0 0x2000>;
	interrupt-parent = <&tegra_agic>;
	interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
		     <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
	clocks = <&tegra_car TEGRA210_CLK_D_AUDIO>;
	clock-names = "d_audio";
	#dma-cells = <1>;
};