[PATCH RESEND V3] ASoC: cs42xx8: add reset-gpio in binding document

[S.j. Wang]

Add reset-gpio property, which is an optional option

Signed-off-by: Shengjiu Wang <shengjiu.w...@nxp.com>
---
Changes in RESEND v3
- send updated binding document only

Changes in v3
- update binding document.

Changes in v2
- use devm_gpiod_get_optional instead of of_get_named_gpio

 Documentation/devicetree/bindings/sound/cs42xx8.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/cs42xx8.txt 
b/Documentation/devicetree/bindings/sound/cs42xx8.txt
index 8619a156d038..ab8f54095269 100644
--- a/Documentation/devicetree/bindings/sound/cs42xx8.txt
+++ b/Documentation/devicetree/bindings/sound/cs42xx8.txt
@@ -14,6 +14,11 @@ Required properties:
   - VA-supply, VD-supply, VLS-supply, VLC-supply: power supplies for the 
device,
     as covered in Documentation/devicetree/bindings/regulator/regulator.txt
 
+Optional properties:
+
+  - reset-gpio : a GPIO spec to define which pin is connected to the chip's
+    !RESET pin
+
 Example:
 
 cs42888: codec@48 {
@@ -25,4 +30,5 @@ cs42888: codec@48 {
        VD-supply = <&reg_audio>;
        VLS-supply = <&reg_audio>;
        VLC-supply = <&reg_audio>;
+       reset-gpio = <&pca9557_b 1 1>;
 };
-- 
2.21.0