From: Yuan Yao <[email protected]> Adding devicetree binding for QorIQ queue direct memory access(QDMA). This module can be found on QorIQ LS1021A and LS1043A SoCs.
Signed-off-by: Yuan Yao <[email protected]> --- .../devicetree/bindings/dma/qoriq-qdma.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/qoriq-qdma.txt diff --git a/Documentation/devicetree/bindings/dma/qoriq-qdma.txt b/Documentation/devicetree/bindings/dma/qoriq-qdma.txt new file mode 100644 index 0000000..dfa286e --- /dev/null +++ b/Documentation/devicetree/bindings/dma/qoriq-qdma.txt @@ -0,0 +1,38 @@ +* QorIQ queue Direct Memory Access Controller(qDMA) Controller + + The QorIQ qDMA controller transfers blocks of data between one source and one or more +destinations. The blocks of data transferred can be represented in memory as contiguous +or non-contiguous using scatter/gather table(s). Channel virtualization is supported +through enqueuing of DMA jobs to, or dequeuing DMA jobs from, different work +queues. + +* qDMA Controller +Required properties: +- compatible : + - "fsl,ls1021a-qdma", + Or "fsl,ls1043a-qdma" followed by "fsl,ls1021a-qdma", +- reg : Specifies base physical address(s) and size of the qDMA registers. + The region is qDMA control register's address and size. +- interrupts : A list of interrupt-specifiers, one for each entry in + interrupt-names. +- interrupt-names : Should contain: + "qdma-error" - the error interrupt + "qdma-queue" - the queue interrupt + +Optional properties: +- 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: qdma@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"; + big-endian; + }; -- 2.1.0.27.g96db324
