[PATCH v1 1/2] ASoC: dt-bindings: Document dmic_sel-gpios optional prop for two DMICs case

[Ajye Huang]

Document dmic_sel-gpios optional prop for switching between two DMICs.
Ex, the GPIO can control a MUX to select Front or Rear dmic.

Signed-off-by: Ajye Huang <ajye_huang at compal.corp-partner.google.com>
---
 Documentation/devicetree/bindings/sound/dmic-codec.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/dmic-codec.yaml b/Documentation/devicetree/bindings/sound/dmic-codec.yaml
index bba27c985996..4013af65f3e7 100644
--- a/Documentation/devicetree/bindings/sound/dmic-codec.yaml
+++ b/Documentation/devicetree/bindings/sound/dmic-codec.yaml
@@ -36,6 +36,10 @@ properties:
   wakeup-delay-ms:
     description: Delay (in ms) after enabling the DMIC
 
+  dmic_sel-gpios:
+    maxItems: 1
+    description: GPIO for switching between DMICs, ex Front/Rear dmic
+
 required:
   - compatible
 
@@ -48,6 +52,7 @@ examples:
     dmic {
         compatible = "dmic-codec";
         dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>;
+        dmic_sel-gpios = <&pio 23 GPIO_ACTIVE_HIGH>;
         num-channels = <1>;
         wakeup-delay-ms = <50>;
         modeswitch-delay-ms = <35>;
-- 
2.25.1