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45 lines
1.1 KiB
45 lines
1.1 KiB
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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