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Commit b2b48ac4 authored by Vinod Koul's avatar Vinod Koul
Browse files

Merge branch 'topic/zxdma' into for-linus

parents 76891cc8 ed9c87b3
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* 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@0x09c00000{
		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@0b004000 {
		#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";
	}
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@@ -478,6 +478,13 @@ config XGENE_DMA
	select ASYNC_TX_ENABLE_CHANNEL_SWITCH
	help
	  Enable support for the APM X-Gene SoC DMA engine.
config ZX_DMA
	tristate "ZTE ZX296702 DMA support"
	depends on ARCH_ZX
	select DMA_ENGINE
	select DMA_VIRTUAL_CHANNELS
	help
	  Support the DMA engine for ZTE ZX296702 platform devices.

config DMA_ENGINE
	bool
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@@ -58,3 +58,4 @@ obj-$(CONFIG_DMA_SUN6I) += sun6i-dma.o
obj-$(CONFIG_DMA_SUN4I) += sun4i-dma.o
obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o
obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
+951 −0

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