Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / dma / moxa,moxart-dma.txt

diff --git a/kernel/Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt b/kernel/Documentation/devicetree/bindings/dma/moxa,moxart-dma.txt
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+MOXA ART DMA Controller
+
+See dma.txt first
+
+Required properties:
+
+- compatible : Must be "moxa,moxart-dma"
+- reg :                Should contain registers location and length
+- interrupts : Should contain an interrupt-specifier for the sole
+               interrupt generated by the device
+- #dma-cells : Should be 1, a single cell holding a line request number
+
+Example:
+
+       dma: dma@90500000 {
+               compatible = "moxa,moxart-dma";
+               reg = <0x90500080 0x40>;
+               interrupts = <24 0>;
+               #dma-cells = <1>;
+       };
+
+
+Clients:
+
+DMA clients connected to the MOXA ART DMA controller must use the format
+described in the dma.txt file, using a two-cell specifier for each channel:
+a phandle plus one integer cells.
+The two cells in order are:
+
+1. A phandle pointing to the DMA controller.
+2. Peripheral identifier for the hardware handshaking interface.
+
+Example:
+Use specific request line passing from dma
+For example, MMC request line is 5
+
+       sdhci: sdhci@98e00000 {
+               compatible = "moxa,moxart-sdhci";
+               reg = <0x98e00000 0x5C>;
+               interrupts = <5 0>;
+               clocks = <&clk_apb>;
+               dmas =  <&dma 5>,
+                       <&dma 5>;
+               dma-names = "tx", "rx";
+       };