From: Yuan Yao <yao.yuan@xxxxxxx>
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 <yao.yuan@xxxxxxx>
---
.../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
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