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authorAlexander Popov <a13xp0p0v88@gmail.com>2014-06-25 14:52:58 +0400
committerVinod Koul <vinod.koul@intel.com>2014-07-26 00:21:41 +0530
commit9093e72b39402b25911a19a6851815a034e3f753 (patch)
tree15a1409397e8906d892451eb6545a24e2fe470b2 /Documentation
parent555859308723d8d5b828304f5eb9281143fd86b5 (diff)
downloadop-kernel-dev-9093e72b39402b25911a19a6851815a034e3f753.zip
op-kernel-dev-9093e72b39402b25911a19a6851815a034e3f753.tar.gz
dmaengine: mpc512x: add device tree binding document
Introduce a device tree binding document for the MPC512x DMA controller Signed-off-by: Alexander Popov <a13xp0p0v88@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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+* Freescale MPC512x and MPC8308 DMA Controller
+
+The DMA controller in Freescale MPC512x and MPC8308 SoCs can move
+blocks of memory contents between memory and peripherals or
+from memory to memory.
+
+Refer to "Generic DMA Controller and DMA request bindings" in
+the dma/dma.txt file for a more detailed description of binding.
+
+Required properties:
+- compatible: should be "fsl,mpc5121-dma" or "fsl,mpc8308-dma";
+- reg: should contain the DMA controller registers location and length;
+- interrupt for the DMA controller: syntax of interrupt client node
+ is described in interrupt-controller/interrupts.txt file.
+- #dma-cells: the length of the DMA specifier, must be <1>.
+ Each channel of this DMA controller has a peripheral request line,
+ the assignment is fixed in hardware. This one cell
+ in dmas property of a client device represents the channel number.
+
+Example:
+
+ dma0: dma@14000 {
+ compatible = "fsl,mpc5121-dma";
+ reg = <0x14000 0x1800>;
+ interrupts = <65 0x8>;
+ #dma-cells = <1>;
+ };
+
+DMA clients must use the format described in dma/dma.txt file.
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