On Mon, May 14, 2018 at 08:03:04PM +0800, Wen He wrote: > Document the devicetree bindings for NXP Layerscape qDMA controller > which could be found on NXP QorIQ Layerscape SoCs. > > Signed-off-by: Wen He <wen.he_1@xxxxxxx> > --- > change in v4: > - Rewrite the bindings document that follows generic DMA bindings file > > change in v3: > - no change > > change in v2: > - Remove indentation > - Add "Should be" before 'fsl,ls1021a-qdma' > - Replace 'channels' by 'dma-channels' > - Replace 'qdma@8390000' by 'dma-controller@8390000' > > Documentation/devicetree/bindings/dma/fsl-qdma.txt | 41 ++++++++++++++++++++ > 1 files changed, 41 insertions(+), 0 deletions(-) > create mode 100644 Documentation/devicetree/bindings/dma/fsl-qdma.txt > > diff --git a/Documentation/devicetree/bindings/dma/fsl-qdma.txt b/Documentation/devicetree/bindings/dma/fsl-qdma.txt > new file mode 100644 > index 0000000..368c4e7 > --- /dev/null > +++ b/Documentation/devicetree/bindings/dma/fsl-qdma.txt > @@ -0,0 +1,41 @@ > +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-error": the error interrupt > + "qdma-queue": the queue interrupt > +- queues: Should contain number of queues supported. Needs a vendor prefix. > + > +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 0x8398000 0x0 0x2000 /* Controller registers */ > + 0x0 0x839a000 0x0 0x2000>; /* Block registers */ > + interrupts = <GIC_SPI 185 IRQ_TYPE_LEVEL_HIGH>, > + <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>; > + interrupt-names = "qdma-error", "qdma-queue"; > + dma-channels = <8>; > + queues = <2>; > + big-endian; > + }; > + > +DMA clients must use the format described in dma/dma.txt file. > -- > 1.7.1 > > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html