39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
* ZTE ZX296702 DMA controller
|
|
|
|
Required properties:
|
|
- compatible: Should be "zte,zx296702-dma"
|
|
- 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:
|
|
dma: dma-controller@09c00000{
|
|
compatible = "zte,zx296702-dma";
|
|
reg = <0x09c00000 0x1000>;
|
|
clocks = <&topclk ZX296702_DMA_ACLK>;
|
|
interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
|
|
#dma-cells = <1>;
|
|
dma-channels = <24>;
|
|
dma-requests = <24>;
|
|
};
|
|
|
|
Client:
|
|
Use specific request line passing from dmax
|
|
For example, spdif0 tx channel request line is 4
|
|
spdif0: spdif0@b004000 {
|
|
#sound-dai-cells = <0>;
|
|
compatible = "zte,zx296702-spdif";
|
|
reg = <0x0b004000 0x1000>;
|
|
clocks = <&lsp0clk ZX296702_SPDIF0_DIV>;
|
|
clock-names = "tx";
|
|
interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
|
|
dmas = <&dma 4>;
|
|
dma-names = "tx";
|
|
}
|