[PATCH v3 2/3] dt-bindings: soundwire: qcom: document optional wake irq

[Srinivas Kandagatla]

Wake IRQ is optional interrupt that can be wired up on SoundWire controller
instances like RX path along with MBHC(Multi Button Headset connection).
Document this in bindings.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla at linaro.org>
---
 .../devicetree/bindings/soundwire/qcom,sdw.txt     | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
index b93a2b3e029d..51ddbc509382 100644
--- a/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
+++ b/Documentation/devicetree/bindings/soundwire/qcom,sdw.txt
@@ -22,7 +22,19 @@ board specific bus parameters.
 - interrupts:
 	Usage: required
 	Value type: <prop-encoded-array>
-	Definition: should specify the SoundWire Controller IRQ
+	Definition: should specify the SoundWire Controller core and optional
+		    wake IRQ
+
+- interrupt-names:
+	Usage: Optional
+	Value type: boolean
+	Value type: <stringlist>
+	Definition: should be "core" for core and "wakeup" for wake interrupt.
+
+- wakeup-source:
+	Usage: Optional
+	Value type: boolean
+	Definition: should specify if SoundWire Controller is wake up capable.
 
 - clock-names:
 	Usage: required
-- 
2.21.0