- 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: Must be “nvidia,tegra210-adma”.
- 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. - interrupt-parent: Phandle to the interrupt parent controller.
- 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>;
};
