X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=Documentation%2Fdevicetree%2Fbindings%2Fsound%2Ftas2552.txt;h=c49992c0b62acb97f9d6bb11ad41812747242f84;hb=b779157dd3db6199b50e7ad64678a1ceedbeebcf;hp=55e2a0af5645f96aa5b60531755713aaa88eb4bb;hpb=5e40d331bd72447197f26525f21711c4a265b6a6;p=firefly-linux-kernel-4.4.55.git

diff --git a/Documentation/devicetree/bindings/sound/tas2552.txt b/Documentation/devicetree/bindings/sound/tas2552.txt
index 55e2a0af5645..c49992c0b62a 100644
--- a/Documentation/devicetree/bindings/sound/tas2552.txt
+++ b/Documentation/devicetree/bindings/sound/tas2552.txt
@@ -14,6 +14,12 @@ Required properties:
 Optional properties:
 	- enable-gpio - gpio pin to enable/disable the device
 
+tas2552 can receive it's reference clock via MCLK, BCLK, IVCLKIN pin or use the
+internal 1.8MHz. This CLKIN is used by the PLL. In addition to PLL, the PDM
+reference clock is also selectable: PLL, IVCLKIN, BCLK or MCLK.
+For system integration the dt-bindings/sound/tas2552.h header file provides
+defined values to selct and configure the PLL and PDM reference clocks.
+
 Example:
 
 tas2552: tas2552@41 {