ASoC: rt5663: Add documentation for power supply support

rt5663 codec driver will support setting CPVDD and AVDD power supply
from device tree.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/rt5663.txt b/Documentation/devicetree/bindings/sound/rt5663.txt
index 23386446c63d6fde5b63c35b8badd989a8ada56b..2a55e9133408215f1c46b806a2043b0bc4763a25 100644 (file)
--- a/Documentation/devicetree/bindings/sound/rt5663.txt
+++ b/Documentation/devicetree/bindings/sound/rt5663.txt
@@ -10,6 +10,10 @@ Required properties:
 
 - interrupts : The CODEC's interrupt output.
 
+- avdd-supply: Power supply for AVDD, providing 1.8V.
+
+- cpvdd-supply: Power supply for CPVDD, providing 3.5V.
+
 Optional properties:
 
 - "realtek,dc_offset_l_manual"
@@ -51,4 +55,6 @@ rt5663: codec@12 {
        compatible = "realtek,rt5663";
        reg = <0x12>;
        interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+       avdd-supply = <&pp1800_a_alc5662>;
+       cpvdd-supply = <&pp3500_a_alc5662>;
 };