bindings: sound: davinci-mcasp: Add support for optional auxclk-fs-ratio

When McASP is bus master it's reference clock (AUXCLK) might not be a
static clock, but running at a specific FS ratio.

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 a58f79f5345cd75aff5bc82acf28342e2ca6b555..c483dcec01f8c67942dd2238c91ed96ed97f54bf 100644 (file)
--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -44,6 +44,9 @@ Optional properties:
                 please refer to pinctrl-bindings.txt
 - fck_parent : Should contain a valid clock name which will be used as parent
               for the McASP fck
+- auxclk-fs-ratio: When McASP is bus master indicates the ratio between AUCLK
+                  and FS rate if applicable:
+                  AUCLK rate = auxclk-fs-ratio * FS rate
 
 Optional GPIO support:
 If any McASP pin need to be used as GPIO then the McASP node must have: