ARM: dt: tegra: Add Tegra APB DMA device tree binding

Document binding, and add the node to tegra*.dtsi.

The driver isn't actually instantiated from this node yet, but the I2S
binding will rely on being able to refer to the APB DMA node using a
phandle.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 30 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt b/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt
new file mode 100644
index 000000000000..90fa7da525b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/tegra20-apbdma.txt
@@ -0,0 +1,30 @@
+* NVIDIA Tegra APB DMA controller
+
+Required properties:
+- compatible: Should be "nvidia,<chip>-apbdma"
+- reg: Should contain DMA registers location and length. This shuld include
+  all of the per-channel registers.
+- interrupts: Should contain all of the per-channel DMA interrupts.
+
+Examples:
+
+apbdma: dma@6000a000 {
+        compatible = "nvidia,tegra20-apbdma";
+        reg = <0x6000a000 0x1200>;
+        interrupts = < 0 136 0x04
+                       0 137 0x04
+                       0 138 0x04
+                       0 139 0x04
+                       0 140 0x04
+                       0 141 0x04
+                       0 142 0x04
+                       0 143 0x04
+                       0 144 0x04
+                       0 145 0x04
+                       0 146 0x04
+                       0 147 0x04
+                       0 148 0x04
+                       0 149 0x04
+                       0 150 0x04
+                       0 151 0x04 >;
+};