ASoC: img: Add spdif output binding document

Add a device tree binding document for the Imagination Technologies
spdif output controller

Change-Id: I01f002bf983bd3122df4c25c52e61cb077acab3c
Signed-off-by: Damien Horsley <Damien.Horsley@imgtec.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/img,spdif-out.txt b/Documentation/devicetree/bindings/sound/img,spdif-out.txt
new file mode 100644
index 00000000000..d6c61b16cbc
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/img,spdif-out.txt
@@ -0,0 +1,41 @@
+Imagination Technologies SPDIF Out Controller
+
+Required properties:
+
+  - compatible : Compatible list, must contain "img,spdif-out"
+
+  - #sound-dai-cells : Must be equal to 0
+
+  - reg : Offset and length of the register set for the device
+
+  - interrupts : Contains the spdif out interrupt
+
+  - dmas : Generic dma devicetree binding as described in
+           Documentation/devicetree/bindings/dma/dma.txt
+
+  - dma-names : Includes "tx"
+
+  - clocks : Contains an entry for each entry in clock-names
+
+  - clock-names : Includes the following entries:
+	"sys"	The system clock
+	"ref"	The reference clock
+
+  - resets: Must contain a phandle to the spdif out reset signal
+
+  - reset-names: Must contain the reset signal name "rst"
+
+Example:
+
+spdif_out: spdif-out@18100D00 {
+	compatible = "img,spdif-out";
+	#sound-dai-cells = <0>;
+	reg = <0x18100D00 0x100>;
+	interrupts = <GIC_SHARED 21 IRQ_TYPE_LEVEL_HIGH>;
+	dmas = <&mdc 14 0xffffffff 0>;
+	dma-names = "tx";
+	clocks = <&system_clk>, <&clk_audio>;
+	clock-names = "sys", "ref";
+	resets = <&pistachio_reset PISTACHIO_RESET_SPDIF_OUT>;
+	reset-names = "rst";
+};