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| author | Vinod Koul <vkoul@kernel.org> | 2019-03-12 09:33:55 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-03-12 09:33:55 +0300 |
| commit | 79074168de928409a4acfd238e25ff9bdcc0e4a8 (patch) | |
| tree | 6dc28cd886b8c694d614bf92555cee7d14f798b9 /Documentation/devicetree/bindings/dma | |
| parent | 278489c2e19c21a476f80cb9b183afaa773b378f (diff) | |
| parent | 6175f6a7ebc77a3c83b425fdb4fc186c771193bf (diff) | |
| download | linux-79074168de928409a4acfd238e25ff9bdcc0e4a8.tar.xz | |
Merge branch 'topic/fsl' into for-linus
Diffstat (limited to 'Documentation/devicetree/bindings/dma')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/fsl-qdma.txt | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/fsl-qdma.txt b/Documentation/devicetree/bindings/dma/fsl-qdma.txt new file mode 100644 index 000000000000..6a0ff9059e72 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/fsl-qdma.txt @@ -0,0 +1,57 @@ +NXP Layerscape SoC qDMA Controller +================================== + +This device follows the generic DMA bindings defined in dma/dma.txt. + +Required properties: + +- compatible: Must be one of + "fsl,ls1021a-qdma": for LS1021A Board + "fsl,ls1043a-qdma": for ls1043A Board + "fsl,ls1046a-qdma": for ls1046A Board +- reg: Should contain the register's base address and length. +- interrupts: Should contain a reference to the interrupt used by this + device. +- interrupt-names: Should contain interrupt names: + "qdma-queue0": the block0 interrupt + "qdma-queue1": the block1 interrupt + "qdma-queue2": the block2 interrupt + "qdma-queue3": the block3 interrupt + "qdma-error": the error interrupt +- fsl,dma-queues: Should contain number of queues supported. +- dma-channels: Number of DMA channels supported +- block-number: the virtual block number +- block-offset: the offset of different virtual block +- status-sizes: status queue size of per virtual block +- queue-sizes: command queue size of per virtual block, the size number + based on queues + +Optional properties: + +- dma-channels: Number of DMA channels supported by the controller. +- big-endian: If present registers and hardware scatter/gather descriptors + of the qDMA are implemented in big endian mode, otherwise in little + mode. + +Examples: + + qdma: dma-controller@8390000 { + compatible = "fsl,ls1021a-qdma"; + reg = <0x0 0x8388000 0x0 0x1000>, /* Controller regs */ + <0x0 0x8389000 0x0 0x1000>, /* Status regs */ + <0x0 0x838a000 0x0 0x2000>; /* Block regs */ + interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "qdma-error", + "qdma-queue0", "qdma-queue1"; + dma-channels = <8>; + block-number = <2>; + block-offset = <0x1000>; + fsl,dma-queues = <2>; + status-sizes = <64>; + queue-sizes = <64 64>; + big-endian; + }; + +DMA clients must use the format described in dma/dma.txt file. |