[PATCH v3] dt: atmel_ac97c: Add device tree documentation

[Alexander Stein <alexanders83-S0/GAf8tV78@public.gmane.org>]

This adds the bindings for AC97 controller device tree support.

Signed-off-by: Alexander Stein <alexanders83-S0/GAf8tV78@public.gmane.org>
Acked-By Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
---
Changes in v3:
* Renamed the compatible string to atmel,at91sam9263-ac97c
* Added 'Acked-By Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>'

Changes in v2:
* Split from commit adding actual code

 .../devicetree/bindings/sound/atmel_ac97c.txt        | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/atmel_ac97c.txt

diff --git a/Documentation/devicetree/bindings/sound/atmel_ac97c.txt b/Documentation/devicetree/bindings/sound/atmel_ac97c.txt
new file mode 100644
index 0000000..b151bd9
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/atmel_ac97c.txt
@@ -0,0 +1,20 @@
+* Atmel AC97 controller
+
+Required properties:
+  - compatible: "atmel,at91sam9263-ac97c"
+  - reg: Address and length of the register set for the device
+  - interrupts: Should contain AC97 interrupt
+  - ac97-gpios: Please refer to soc-ac97link.txt, only ac97-reset is used
+Optional properties:
+  - pinctrl-names, pinctrl-0: Please refer to pinctrl-bindings.txt
+
+Example:
+sound@fffa0000 {
+       compatible = "atmel,at91sam9263-ac97c";
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_ac97>;
+       reg = <0xfffa0000 0x4000>;
+       interrupts = <18 IRQ_TYPE_LEVEL_HIGH 5>;
+
+       ac97-gpios = <&pioB 0 0 &pioB 2 0 &pioC 29 GPIO_ACTIVE_LOW>;
+};
-- 
2.2.1

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