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47 lines
1.2 KiB
47 lines
1.2 KiB
* Hisilicon K3 DMA controller |
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See dma.txt first |
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Required properties: |
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- compatible: Must be one of |
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- "hisilicon,k3-dma-1.0" |
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- "hisilicon,hisi-pcm-asp-dma-1.0" |
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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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dma0: dma@fcd02000 { |
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compatible = "hisilicon,k3-dma-1.0"; |
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reg = <0xfcd02000 0x1000>; |
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#dma-cells = <1>; |
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dma-channels = <16>; |
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dma-requests = <27>; |
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interrupts = <0 12 4>; |
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clocks = <&pclk>; |
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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, i2c0 read channel request line is 18, while write channel use 19 |
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i2c0: i2c@fcb08000 { |
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compatible = "snps,designware-i2c"; |
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dmas = <&dma0 18 /* read channel */ |
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&dma0 19>; /* write channel */ |
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dma-names = "rx", "tx"; |
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}; |
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i2c1: i2c@fcb09000 { |
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compatible = "snps,designware-i2c"; |
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dmas = <&dma0 20 /* read channel */ |
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&dma0 21>; /* write channel */ |
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dma-names = "rx", "tx"; |
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}; |
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