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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/device-tree/Bindings/dma/fsl-qdma.txt
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NXP Layerscape SoC qDMA Controller

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==================================

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This device follows the generic DMA bindings defined in dma/dma.txt.

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Required properties:

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- compatible:		Must be one of

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			 "fsl,ls1021a-qdma": for LS1021A Board

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			 "fsl,ls1028a-qdma": for LS1028A Board

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			 "fsl,ls1043a-qdma": for ls1043A Board

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			 "fsl,ls1046a-qdma": for ls1046A Board

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- reg:			Should contain the register's base address and length.

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- interrupts:		Should contain a reference to the interrupt used by this

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			device.

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- interrupt-names:	Should contain interrupt names:

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			 "qdma-queue0": the block0 interrupt

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			 "qdma-queue1": the block1 interrupt

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			 "qdma-queue2": the block2 interrupt

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			 "qdma-queue3": the block3 interrupt

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			 "qdma-error":  the error interrupt

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- fsl,dma-queues:	Should contain number of queues supported.

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- dma-channels:	Number of DMA channels supported

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- block-number:	the virtual block number

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- block-offset:	the offset of different virtual block

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- status-sizes:	status queue size of per virtual block

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- queue-sizes:		command queue size of per virtual block, the size number

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			based on queues

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Optional properties:

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- dma-channels:		Number of DMA channels supported by the controller.

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- big-endian:		If present registers and hardware scatter/gather descriptors

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			of the qDMA are implemented in big endian mode, otherwise in little

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			mode.

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Examples:

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	qdma: dma-controller@8390000 {

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			compatible = "fsl,ls1021a-qdma";

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			reg = <0x0 0x8388000 0x0 0x1000>, /* Controller regs */

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			      <0x0 0x8389000 0x0 0x1000>, /* Status regs */

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			      <0x0 0x838a000 0x0 0x2000>; /* Block regs */

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			interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>,

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				     <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,

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				     <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;

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			interrupt-names = "qdma-error",

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				"qdma-queue0", "qdma-queue1";

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			dma-channels = <8>;

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			block-number = <2>;

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			block-offset = <0x1000>;

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			fsl,dma-queues = <2>;

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			status-sizes = <64>;

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			queue-sizes = <64 64>;

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			big-endian;

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		};

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DMA clients must use the format described in dma/dma.txt file.

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