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* Hisilicon K3 DMA controller
See dma.txt first
Required properties:
- compatible: Should be "hisilicon,k3-dma-1.0"
- reg: Should contain DMA registers location and length.
- interrupts: Should contain one interrupt shared by all channel
- #dma-cells: see dma.txt, should be 1, para number
- dma-channels: physical channels supported
- dma-requests: virtual channels supported, each virtual channel
have specific request line
- clocks: clock required
Example:
Controller:
dma0: dma@fcd02000 {
compatible = "hisilicon,k3-dma-1.0";
reg = <0xfcd02000 0x1000>;
#dma-cells = <1>;
dma-channels = <16>;
dma-requests = <27>;
interrupts = <0 12 4>;
clocks = <&pclk>;
status = "disable";
};
Client:
Use specific request line passing from dmax
For example, i2c0 read channel request line is 18, while write channel use 19
i2c0: i2c@fcb08000 {
compatible = "snps,designware-i2c";
dmas = <&dma0 18 /* read channel */
&dma0 19>; /* write channel */
dma-names = "rx", "tx";
};
i2c1: i2c@fcb09000 {
compatible = "snps,designware-i2c";
dmas = <&dma0 20 /* read channel */
&dma0 21>; /* write channel */
dma-names = "rx", "tx";
};
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