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+Keystone Navigator DMA Controller
+
+This document explains the device tree bindings for the packet dma
+on keystone devices. The Keystone Navigator DMA driver sets up the dma
+channels and flows for the QMSS(Queue Manager SubSystem) who triggers
+the actual data movements across clients using destination queues. Every
+client modules like  NETCP(Network Coprocessor), SRIO(Serial Rapid IO),
+CRYPTO Engines etc has its own instance of dma hardware. QMSS has also
+an internal packet DMA module which is used as an infrastructure DMA
+with zero copy.
+
+Navigator DMA cloud layout:
+	------------------
+	| Navigator DMAs |
+	------------------
+		|
+		|-> DMA instance #0
+		|
+		|-> DMA instance #1
+			.
+			.
+		|
+		|-> DMA instance #n
+
+Navigator DMA properties:
+Required properties:
+ - compatible: Should be "ti,keystone-navigator-dma"
+ - clocks: phandle to dma instances clocks. The clock handles can be as
+	many as the dma instances. The order should be maintained as per
+	the dma instances.
+ - ti,navigator-cloud-address: Should contain base address for the multi-core
+	navigator cloud and number of addresses depends on SOC integration
+	configuration.. Navigator cloud global address needs to be programmed
+	into DMA and the DMA uses it as the physical addresses to reach queue
+	managers. Note that these addresses though points to queue managers,
+	they are relevant only from DMA perspective. The QMSS may not choose to
+	use them since it has a different address space view to reach all
+	its components.
+
+DMA instance properties:
+Required properties:
+ - reg: Should contain register location and length of the following dma
+	register regions. Register regions should be specified in the following
+	order.
+	- Global control register region (global).
+	- Tx DMA channel configuration register region (txchan).
+	- Rx DMA channel configuration register region (rxchan).
+	- Tx DMA channel Scheduler configuration register region (txsched).
+	- Rx DMA flow configuration register region (rxflow).
+
+Optional properties:
+ - reg-names: Names for the register regions.
+ - ti,enable-all: Enable all DMA channels vs clients opening specific channels
+	what they need. This property is useful for the userspace fast path
+	case where the linux drivers enables the channels used by userland
+	stack.
+ - ti,loop-back: To loopback Tx streaming I/F to Rx streaming I/F. Used for
+	      infrastructure transfers.
+ - ti,rx-retry-timeout: Number of dma cycles to wait before retry on buffer
+		     starvation.
+
+Example:
+
+	knav_dmas: knav_dmas@0 {
+		compatible = "ti,keystone-navigator-dma";
+		clocks = <&papllclk>, <&clkxge>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		ti,navigator-cloud-address = <0x23a80000 0x23a90000
+					   0x23aa0000 0x23ab0000>;
+
+		dma_gbe: dma_gbe@0 {
+			reg = <0x2004000 0x100>,
+				  <0x2004400 0x120>,
+				  <0x2004800 0x300>,
+				  <0x2004c00 0x120>,
+				  <0x2005000 0x400>;
+			reg-names = "global", "txchan", "rxchan",
+					"txsched", "rxflow";
+		};
+
+		dma_xgbe: dma_xgbe@0 {
+			reg = <0x2fa1000 0x100>,
+				<0x2fa1400 0x200>,
+				<0x2fa1800 0x200>,
+				<0x2fa1c00 0x200>,
+				<0x2fa2000 0x400>;
+			reg-names = "global", "txchan", "rxchan",
+					"txsched", "rxflow";
+		};
+	};
+
+Navigator DMA client:
+Required properties:
+ - ti,navigator-dmas: List of one or more DMA specifiers, each consisting of
+			- A phandle pointing to DMA instance node
+			- A DMA channel number as a phandle arg.
+ - ti,navigator-dma-names: Contains dma channel name for each DMA specifier in
+			the 'ti,navigator-dmas' property.
+
+Example:
+
+	netcp: netcp@2090000 {
+		..
+		ti,navigator-dmas = <&dma_gbe 22>,
+				<&dma_gbe 23>,
+				<&dma_gbe 8>;
+		ti,navigator-dma-names = "netrx0", "netrx1", "nettx";
+		..
+	};