dmaengine: edma: Add TI EDMA device tree binding

The binding definition is based on the generic DMA controller
binding.

Signed-off-by: Matt Porter <mporter@ti.com>

diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
new file mode 100644 (file)
index 0000000..075a60e
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
@@ -0,0 +1,49 @@
+TI EDMA
+
+Required properties:
+- compatible : "ti,edma3"
+- ti,hwmods: Name of the hwmods associated to the EDMA
+- ti,edma-regions: Number of regions
+- ti,edma-slots: Number of slots
+- ti,edma-queue-tc-map: List of transfer control to queue mappings
+- ti,edma-queue-priority-map: List of queue priority mappings
+- ti,edma-default-queue: Default queue value
+
+Optional properties:
+- ti,edma-reserved-channels: List of reserved channel regions
+- ti,edma-reserved-slots: List of reserved slot regions
+- ti,edma-xbar-event-map: Crossbar event to channel map
+
+Example:
+
+edma: edma@49000000 {
+       reg = <0x49000000 0x10000>;
+       interrupt-parent = <&intc>;
+       interrupts = <12 13 14>;
+       compatible = "ti,edma3";
+       ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";
+       #dma-cells = <1>;
+       dma-channels = <64>;
+       ti,edma-regions = <4>;
+       ti,edma-slots = <256>;
+       ti,edma-reserved-channels = <0  2
+                                    14 2
+                                    26 6
+                                    48 4
+                                    56 8>;
+       ti,edma-reserved-slots = <0  2
+                                 14 2
+                                 26 6
+                                 48 4
+                                 56 8
+                                 64 127>;
+       ti,edma-queue-tc-map = <0 0
+                               1 1
+                               2 2>;
+       ti,edma-queue-priority-map = <0 0
+                                     1 1
+                                     2 2>;
+       ti,edma-default-queue = <0>;
+       ti,edma-xbar-event-map = <1 12
+                                 2 13>;
+};