1 * Hisilicon K3 DMA controller 1 * Hisilicon K3 DMA controller
2 2
3 See dma.txt first 3 See dma.txt first
4 4
5 Required properties: 5 Required properties:
6 - compatible: Must be one of 6 - compatible: Must be one of
7 - "hisilicon,k3-dma-1.0" 7 - "hisilicon,k3-dma-1.0"
8 - "hisilicon,hisi-pcm-asp-dma-1.0 8 - "hisilicon,hisi-pcm-asp-dma-1.0"
9 - reg: Should contain DMA registers location a 9 - reg: Should contain DMA registers location and length.
10 - interrupts: Should contain one interrupt sha 10 - interrupts: Should contain one interrupt shared by all channel
11 - #dma-cells: see dma.txt, should be 1, para n 11 - #dma-cells: see dma.txt, should be 1, para number
12 - dma-channels: physical channels supported 12 - dma-channels: physical channels supported
13 - dma-requests: virtual channels supported, ea 13 - dma-requests: virtual channels supported, each virtual channel
14 have specific request line 14 have specific request line
15 - clocks: clock required 15 - clocks: clock required
16 16
17 Example: 17 Example:
18 18
19 Controller: 19 Controller:
20 dma0: dma@fcd02000 { 20 dma0: dma@fcd02000 {
21 compatible = "hisilico 21 compatible = "hisilicon,k3-dma-1.0";
22 reg = <0xfcd02000 0x10 22 reg = <0xfcd02000 0x1000>;
23 #dma-cells = <1>; 23 #dma-cells = <1>;
24 dma-channels = <16>; 24 dma-channels = <16>;
25 dma-requests = <27>; 25 dma-requests = <27>;
26 interrupts = <0 12 4>; 26 interrupts = <0 12 4>;
27 clocks = <&pclk>; 27 clocks = <&pclk>;
28 }; 28 };
29 29
30 Client: 30 Client:
31 Use specific request line passing from dmax 31 Use specific request line passing from dmax
32 For example, i2c0 read channel request line is 32 For example, i2c0 read channel request line is 18, while write channel use 19
33 33
34 i2c0: i2c@fcb08000 { 34 i2c0: i2c@fcb08000 {
35 compatible = "snps,des 35 compatible = "snps,designware-i2c";
36 dmas = <&dma0 18 36 dmas = <&dma0 18 /* read channel */
37 &dma0 19>; 37 &dma0 19>; /* write channel */
38 dma-names = "rx", "tx" 38 dma-names = "rx", "tx";
39 }; 39 };
40 40
41 i2c1: i2c@fcb09000 { 41 i2c1: i2c@fcb09000 {
42 compatible = "snps,des 42 compatible = "snps,designware-i2c";
43 dmas = <&dma0 20 43 dmas = <&dma0 20 /* read channel */
44 &dma0 21>; 44 &dma0 21>; /* write channel */
45 dma-names = "rx", "tx" 45 dma-names = "rx", "tx";
46 }; 46 };
47 47
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