[PATCH 3/4] [media] ad5820: DT new optional field enable-gpios

[Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>]

Document new enable-gpio field. It can be used to disable the part
without turning down its regulator.

Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx>
---
 Documentation/devicetree/bindings/media/i2c/ad5820.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/ad5820.txt b/Documentation/devicetree/bindings/media/i2c/ad5820.txt
index 5940ca11c021..07d577bb37f7 100644
--- a/Documentation/devicetree/bindings/media/i2c/ad5820.txt
+++ b/Documentation/devicetree/bindings/media/i2c/ad5820.txt
@@ -8,6 +8,11 @@ Required Properties:
 
   - VANA-supply: supply of voltage for VANA pin
 
+Optional properties:
+
+   - enable-gpios : GPIO spec for the XSHUTDOWN pin. If specified, it will be
+     asserted when VANA-supply is enabled.
+
 Example:
 
        ad5820: coil@c {
@@ -15,5 +20,6 @@ Example:
                reg = <0x0c>;
 
                VANA-supply = <&vaux4>;
+               enable-gpios = <&msmgpio 26 GPIO_ACTIVE_HIGH>;
        };
 
-- 
2.18.0