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-rw-r--r--kernel/Documentation/devicetree/bindings/sound/tas2552.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/sound/tas2552.txt b/kernel/Documentation/devicetree/bindings/sound/tas2552.txt
index 55e2a0af5..c49992c0b 100644
--- a/kernel/Documentation/devicetree/bindings/sound/tas2552.txt
+++ b/kernel/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 {