31 lines
989 B
Plaintext
31 lines
989 B
Plaintext
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* ARM PrimeCell PL330 DMA Controller
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The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
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between memory and peripherals or memory to memory.
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Required properties:
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- compatible: should include both "arm,pl330" and "arm,primecell".
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- reg: physical base address of the controller and length of memory mapped
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region.
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- interrupts: interrupt number to the cpu.
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Example:
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pdma0: pdma@12680000 {
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compatible = "arm,pl330", "arm,primecell";
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reg = <0x12680000 0x1000>;
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interrupts = <99>;
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};
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Client drivers (device nodes requiring dma transfers from dev-to-mem or
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mem-to-dev) should specify the DMA channel numbers using a two-value pair
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as shown below.
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[property name] = <[phandle of the dma controller] [dma request id]>;
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where 'dma request id' is the dma request number which is connected
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to the client controller. The 'property name' is recommended to be
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of the form <name>-dma-channel.
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Example: tx-dma-channel = <&pdma0 12>;
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