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2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e 
 kernel/Documentation/devicetree/bindings/dma/dma.txt
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-* Generic DMA Controller and DMA request bindings
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-
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-Generic binding to provide a way for a driver using DMA Engine to retrieve the
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-DMA request or channel information that goes from a hardware device to a DMA
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-controller.
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-
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-
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-* DMA controller
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-
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-Required property:
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-- #dma-cells: 		Must be at least 1. Used to provide DMA controller
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-			specific information. See DMA client binding below for
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-			more details.
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-
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-Optional properties:
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-- dma-channels: 	Number of DMA channels supported by the controller.
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-- dma-requests: 	Number of DMA request signals supported by the
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-			controller.
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-
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-Example:
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-
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-	dma: dma@48000000 {
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-		compatible = "ti,omap-sdma";
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-		reg = <0x48000000 0x1000>;
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-		interrupts = <0 12 0x4
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-			      0 13 0x4
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-			      0 14 0x4
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-			      0 15 0x4>;
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-		#dma-cells = <1>;
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-		dma-channels = <32>;
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-		dma-requests = <127>;
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-	};
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-
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-* DMA router
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-
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-DMA routers are transparent IP blocks used to route DMA request lines from
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-devices to the DMA controller. Some SoCs (like TI DRA7x) have more peripherals
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-integrated with DMA requests than what the DMA controller can handle directly.
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-
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-Required property:
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-- dma-masters:		phandle of the DMA controller or list of phandles for
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-			the DMA controllers the router can direct the signal to.
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-- #dma-cells: 		Must be at least 1. Used to provide DMA router specific
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-			information. See DMA client binding below for more
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-			details.
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-
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-Optional properties:
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-- dma-requests: 	Number of incoming request lines the router can handle.
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-- In the node pointed by the dma-masters:
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-	- dma-requests:	The router driver might need to look for this in order
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-			to configure the routing.
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-
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-Example:
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-	sdma_xbar: dma-router@4a002b78 {
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-		compatible = "ti,dra7-dma-crossbar";
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-		reg = <0x4a002b78 0xfc>;
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-		#dma-cells = <1>;
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-		dma-requests = <205>;
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-		ti,dma-safe-map = <0>;
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-		dma-masters = <&sdma>;
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-	};
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-
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-* DMA client
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-
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-Client drivers should specify the DMA property using a phandle to the controller
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-followed by DMA controller specific data.
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-
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-Required property:
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-- dmas:			List of one or more DMA specifiers, each consisting of
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-			- A phandle pointing to DMA controller node
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-			- A number of integer cells, as determined by the
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-			  #dma-cells property in the node referenced by phandle
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-			  containing DMA controller specific information. This
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-			  typically contains a DMA request line number or a
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-			  channel number, but can contain any data that is
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-			  required for configuring a channel.
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-- dma-names: 		Contains one identifier string for each DMA specifier in
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-			the dmas property. The specific strings that can be used
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-			are defined in the binding of the DMA client device.
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-			Multiple DMA specifiers can be used to represent
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-			alternatives and in this case the dma-names for those
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-			DMA specifiers must be identical (see examples).
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-
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-Examples:
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-
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-1. A device with one DMA read channel, one DMA write channel:
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-
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-	i2c1: i2c@1 {
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-		...
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-		dmas = <&dma 2		/* read channel */
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-			&dma 3>;	/* write channel */
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-		dma-names = "rx", "tx";
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-		...
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-	};
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-
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-2. A single read-write channel with three alternative DMA controllers:
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-
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-	dmas = <&dma1 5
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-		&dma2 7
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-		&dma3 2>;
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-	dma-names = "rx-tx", "rx-tx", "rx-tx";
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-
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-3. A device with three channels, one of which has two alternatives:
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-
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-	dmas = <&dma1 2			/* read channel */
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-		&dma1 3			/* write channel */
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-		&dma2 0			/* error read */
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-		&dma3 0>;		/* alternative error read */
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-	dma-names = "rx", "tx", "error", "error";
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+This file has been moved to dma-controller.yaml.