Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / sound / nvidia,tegra20-ac97.txt

diff --git a/kernel/Documentation/devicetree/bindings/sound/nvidia,tegra20-ac97.txt b/kernel/Documentation/devicetree/bindings/sound/nvidia,tegra20-ac97.txt
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+NVIDIA Tegra 20 AC97 controller
+
+Required properties:
+- compatible : "nvidia,tegra20-ac97"
+- reg : Should contain AC97 controller registers location and length
+- interrupts : Should contain AC97 interrupt
+- resets : Must contain an entry for each entry in reset-names.
+  See ../reset/reset.txt for details.
+- reset-names : Must include the following entries:
+  - ac97
+- dmas : Must contain an entry for each entry in clock-names.
+  See ../dma/dma.txt for details.
+- dma-names : Must include the following entries:
+  - rx
+  - tx
+- clocks : Must contain one entry, for the module clock.
+  See ../clocks/clock-bindings.txt for details.
+- nvidia,codec-reset-gpio : The Tegra GPIO controller's phandle and the number
+  of the GPIO used to reset the external AC97 codec
+- nvidia,codec-sync-gpio : The Tegra GPIO controller's phandle and the number
+  of the GPIO corresponding with the AC97 DAP _FS line
+
+Example:
+
+ac97@70002000 {
+       compatible = "nvidia,tegra20-ac97";
+       reg = <0x70002000 0x200>;
+       interrupts = <0 81 0x04>;
+       nvidia,codec-reset-gpio = <&gpio 170 0>;
+       nvidia,codec-sync-gpio = <&gpio 120 0>;
+       clocks = <&tegra_car 3>;
+       resets = <&tegra_car 3>;
+       reset-names = "ac97";
+       dmas = <&apbdma 12>, <&apbdma 12>;
+       dma-names = "rx", "tx";
+};