From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Wen He Subject: [v7 4/7] dt-bindings: fsl-qdma: Add NXP Layerscpae qDMA controller bindings Date: Wed, 25 Jul 2018 19:29:16 +0800 Message-Id: <20180725112919.31340-4-wen.he_1@nxp.com> In-Reply-To: <20180725112919.31340-1-wen.he_1@nxp.com> References: <20180725112919.31340-1-wen.he_1@nxp.com> To: vkoul@kernel.org, dmaengine@vger.kernel.org Cc: robh+dt@kernel.org, devicetree@vger.kernel.org, leoyang.li@nxp.com, jiafei.pan@nxp.com, jiaheng.fan@nxp.com, wen.he_1@nxp.com List-ID: Document the devicetree bindings for NXP Layerscape qDMA controller which could be found on NXP QorIQ Layerscape SoCs. Signed-off-by: Wen He Reviewed-by: Rob Herring --- 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..99b3d74 --- /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 +- fsl,queues: Should contain number of queues supported. + +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 = , + ; + 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