1 files changed, 67 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/snps-dma.txt b/Documentation/devicetree/bindings/dma/snps-dma.txt
new file mode 100644
index 000000000..39e2b26be
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/snps-dma.txt
@@ -0,0 +1,67 @@
+* Synopsys Designware DMA Controller
+
+Required properties:
+- compatible: "snps,dma-spear1340"
+- reg: Address range of the DMAC registers
+- interrupt: Should contain the DMAC interrupt number
+- dma-channels: Number of channels supported by hardware
+- dma-requests: Number of DMA request lines supported, up to 16
+- dma-masters: Number of AHB masters supported by the controller
+- #dma-cells: must be <3>
+- chan_allocation_order: order of allocation of channel, 0 (default): ascending,
+  1: descending
+- chan_priority: priority of channels. 0 (default): increase from chan 0->n, 1:
+  increase from chan n->0
+- block_size: Maximum block size supported by the controller
+- data-width: Maximum data width supported by hardware per AHB master
+  (in bytes, power of 2)
+
+
+Deprecated properties:
+- data_width: Maximum data width supported by hardware per AHB master
+  (0 - 8bits, 1 - 16bits, ..., 5 - 256bits)
+
+
+Optional properties:
+- is_private: The device channels should be marked as private and not for by the
+  general purpose DMA channel allocator. False if not passed.
+- multi-block: Multi block transfers supported by hardware. Array property with
+  one cell per channel. 0: not supported, 1 (default): supported.
+
+Example:
+
+	dmahost: dma@fc000000 {
+		compatible = "snps,dma-spear1340";
+		reg = <0xfc000000 0x1000>;
+		interrupt-parent = <&vic1>;
+		interrupts = <12>;
+
+		dma-channels = <8>;
+		dma-requests = <16>;
+		dma-masters = <2>;
+		#dma-cells = <3>;
+		chan_allocation_order = <1>;
+		chan_priority = <1>;
+		block_size = <0xfff>;
+		data-width = <8 8>;
+	};
+
+DMA clients connected to the Designware DMA controller must use the format
+described in the dma.txt file, using a four-cell specifier for each channel.
+The four cells in order are:
+
+1. A phandle pointing to the DMA controller
+2. The DMA request line number
+3. Memory master for transfers on allocated channel
+4. Peripheral master for transfers on allocated channel
+
+Example:
+	
+	serial@e0000000 {
+		compatible = "arm,pl011", "arm,primecell";
+		reg = <0xe0000000 0x1000>;
+		interrupts = <0 35 0x4>;
+		dmas = <&dmahost 12 0 1>,
+			<&dmahost 13 1 0>;
+		dma-names = "rx", "rx";
+	};