ASoC: sgtl5000: Add 'clocks' entry as a required propery

Since commit 9e13f345 (ASoC: sgtl5000: Let the codec acquire its clock) , the
'clocks' entry is mandatory, so update the binding doc.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/sgtl5000.txt b/Documentation/devicetree/bindings/sound/sgtl5000.txt
index 9cc44449508d..955df60a118c 100644
--- a/Documentation/devicetree/bindings/sound/sgtl5000.txt
+++ b/Documentation/devicetree/bindings/sound/sgtl5000.txt
@@ -5,9 +5,12 @@ Required properties:
 
 - reg : the I2C address of the device
 
+- clocks : the clock provider of SYS_MCLK
+
 Example:
 
 codec: sgtl5000@0a {
         compatible = "fsl,sgtl5000";
         reg = <0x0a>;
+        clocks = <&clks 150>;
 };