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46 lines
1.1 KiB
Plaintext
46 lines
1.1 KiB
Plaintext
MOXA ART DMA Controller
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See dma.txt first
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Required properties:
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- compatible : Must be "moxa,moxart-dma"
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- reg : Should contain registers location and length
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- interrupts : Should contain an interrupt-specifier for the sole
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interrupt generated by the device
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- #dma-cells : Should be 1, a single cell holding a line request number
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Example:
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dma: dma@90500000 {
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compatible = "moxa,moxart-dma";
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reg = <0x90500080 0x40>;
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interrupts = <24 0>;
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#dma-cells = <1>;
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};
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Clients:
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DMA clients connected to the MOXA ART DMA controller must use the format
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described in the dma.txt file, using a two-cell specifier for each channel:
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a phandle plus one integer cells.
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The two cells in order are:
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1. A phandle pointing to the DMA controller.
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2. Peripheral identifier for the hardware handshaking interface.
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Example:
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Use specific request line passing from dma
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For example, MMC request line is 5
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sdhci: sdhci@98e00000 {
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compatible = "moxa,moxart-sdhci";
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reg = <0x98e00000 0x5C>;
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interrupts = <5 0>;
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clocks = <&clk_apb>;
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dmas = <&dma 5>,
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<&dma 5>;
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dma-names = "tx", "rx";
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};
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