ASoC: davinci-mcasp: Document dismod optional property

The dismod property can be used to specify the drive on level of inactive
TX slots.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
index 46bc982..b279b60 100644 (file)
--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -30,6 +30,11 @@ Optional properties:
 - ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
 - tx-num-evt : FIFO levels.
 - rx-num-evt : FIFO levels.
+- dismod : Specify the drive on TX pin during inactive slots
+       0 : 3-state
+       2 : logic low
+       3 : logic high
+       Defaults to 'logic low' when the property is not present
 - sram-size-playback : size of sram to be allocated during playback
 - sram-size-capture  : size of sram to be allocated during capture
 - interrupts : Interrupt numbers for McASP