projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7f37a3d8 JN |
1 | * ZTE ZX296702 DMA controller |
| 2 | ||
| 3 | Required properties: | |
| 4 | - compatible: Should be "zte,zx296702-dma" | |
| 5 | - reg: Should contain DMA registers location and length. | |
| 6 | - interrupts: Should contain one interrupt shared by all channel | |
| 7 | - #dma-cells: see dma.txt, should be 1, para number | |
| 8 | - dma-channels: physical channels supported | |
| 9 | - dma-requests: virtual channels supported, each virtual channel | |
| 10 | have specific request line | |
| 11 | - clocks: clock required | |
| 12 | ||
| 13 | Example: | |
| 14 | ||
| 15 | Controller: | |
| 16 | dma: dma-controller@0x09c00000{ | |
| 17 | compatible = "zte,zx296702-dma"; | |
| 18 | reg = <0x09c00000 0x1000>; | |
| 19 | clocks = <&topclk ZX296702_DMA_ACLK>; | |
| 20 | interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>; | |
| 21 | #dma-cells = <1>; | |
| 22 | dma-channels = <24>; | |
| 23 | dma-requests = <24>; | |
| 24 | }; | |
| 25 | ||
| 26 | Client: | |
| 27 | Use specific request line passing from dmax | |
| 28 | For example, spdif0 tx channel request line is 4 | |
| 29 | spdif0: spdif0@0b004000 { | |
| 30 | #sound-dai-cells = <0>; | |
| 31 | compatible = "zte,zx296702-spdif"; | |
| 32 | reg = <0x0b004000 0x1000>; | |
| 33 | clocks = <&lsp0clk ZX296702_SPDIF0_DIV>; | |
| 34 | clock-names = "tx"; | |
| 35 | interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>; | |
| 36 | dmas = <&dma 4>; | |
| 37 | dma-names = "tx"; | |
| 38 | } |