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41 lines
1.2 KiB
41 lines
1.2 KiB
* Spreadtrum DMA controller |
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This binding follows the generic DMA bindings defined in dma.txt. |
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Required properties: |
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- compatible: Should be "sprd,sc9860-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: must be <1>. Used to represent the number of integer |
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cells in the dmas property of client device. |
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- #dma-channels : Number of DMA channels supported. Should be 32. |
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- clock-names: Should contain the clock of the DMA controller. |
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- clocks: Should contain a clock specifier for each entry in clock-names. |
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Example: |
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Controller: |
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apdma: dma-controller@20100000 { |
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compatible = "sprd,sc9860-dma"; |
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reg = <0x20100000 0x4000>; |
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interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>; |
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#dma-cells = <1>; |
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#dma-channels = <32>; |
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clock-names = "enable"; |
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clocks = <&clk_ap_ahb_gates 5>; |
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}; |
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Client: |
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DMA clients connected to the Spreadtrum 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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The two cells in order are: |
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1. A phandle pointing to the DMA controller. |
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2. The slave id. |
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spi0: spi@70a00000{ |
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... |
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dma-names = "rx_chn", "tx_chn"; |
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dmas = <&apdma 11>, <&apdma 12>; |
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... |
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};
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