Add headphone and microphone detection GPIO support.

Signed-off-by: Shengjiu Wang <shengjiu.w...@nxp.com>
---
 Documentation/devicetree/bindings/sound/fsl-asoc-card.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt 
b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
index 133d7e14a4d0..8a6a3d0fda5e 100644
--- a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
@@ -69,6 +69,9 @@ Optional properties:
                                coexisting in order to support the old bindings
                                of wm8962 and sgtl5000.
 
+  - hp-det-gpio                : The GPIO that detect headphones are plugged in
+  - mic-det-gpio       : The GPIO that detect microphones are plugged in
+
 Optional unless SSI is selected as a CPU DAI:
 
   - mux-int-port       : The internal port of the i.MX audio muxer (AUDMUX)
-- 
2.27.0

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