dt-bindings: mfd: lp875xx: Add optional reset GPIO

Document the LP8756x-Q1 and LP87524-Q1 ICs reset pin.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

Documentation/devicetree/bindings/mfd/ti,lp87524-q1.yaml

@@ -17,6 +17,10 @@ properties:
     description: I2C slave address
     const: 0x60
 
+  reset-gpios:
+    description: GPIO connected to NRST pin (active low reset, pin 20)
+    maxItems: 1
+
   gpio-controller: true
 
   '#gpio-cells':

Documentation/devicetree/bindings/mfd/ti,lp87561-q1.yaml

@@ -17,6 +17,10 @@ properties:
     description: I2C slave address
     const: 0x60
 
+  reset-gpios:
+    description: GPIO connected to NRST pin (active low reset, pin 20)
+    maxItems: 1
+
   gpio-controller: true
 
   '#gpio-cells':

Documentation/devicetree/bindings/mfd/ti,lp87565-q1.yaml

@@ -19,6 +19,10 @@ properties:
     description: I2C slave address
     const: 0x60
 
+  reset-gpios:
+    description: GPIO connected to NRST pin (active low reset, pin 20)
+    maxItems: 1
+
   gpio-controller: true
 
   '#gpio-cells':