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39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
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* ZTE ZX296702 DMA controller
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Required properties:
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- compatible: Should be "zte,zx296702-dma"
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- reg: Should contain DMA registers location and length.
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- interrupts: Should contain one interrupt shared by all channel
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- #dma-cells: see dma.txt, should be 1, para number
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- dma-channels: physical channels supported
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- dma-requests: virtual channels supported, each virtual channel
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have specific request line
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- clocks: clock required
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Example:
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Controller:
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dma: dma-controller@0x09c00000{
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compatible = "zte,zx296702-dma";
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reg = <0x09c00000 0x1000>;
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clocks = <&topclk ZX296702_DMA_ACLK>;
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interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
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#dma-cells = <1>;
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dma-channels = <24>;
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dma-requests = <24>;
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};
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Client:
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Use specific request line passing from dmax
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For example, spdif0 tx channel request line is 4
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spdif0: spdif0@0b004000 {
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#sound-dai-cells = <0>;
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compatible = "zte,zx296702-spdif";
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reg = <0x0b004000 0x1000>;
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clocks = <&lsp0clk ZX296702_SPDIF0_DIV>;
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clock-names = "tx";
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interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&dma 4>;
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dma-names = "tx";
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}
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