[PATCH v2 5/9] dt-bindings: input: microchip,cap11xx: Add reset-gpios property

[Jun Yan <jerrysteve1101@gmail.com>]

Add support for the optional reset-gpios property to describe
the active-high reset pin for CAP1126/CAP1188 devices.
Driving the GPIO high asserts reset and deep sleep, while driving
it low releases reset for normal operation.

Restrict this property to be available only on CAP1126 and CAP1188
chips, as other CAP11xx variants do not have a hardware reset pin.

Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../bindings/input/microchip,cap11xx.yaml     | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml b/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml
index 22a292d4a880..778ec6d659a8 100644
--- a/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml
+++ b/Documentation/devicetree/bindings/input/microchip,cap11xx.yaml
@@ -49,6 +49,13 @@ properties:
       device's ALERT#/CM_IRQ# pin is connected to.
       The device only has one interrupt source.
 
+  reset-gpios:
+    description: |
+      GPIO connected to the active-high RESET pin of the chip;
+      driving it high asserts reset and deep sleep, while driving
+      it low releases reset for normal operation.
+    maxItems: 1
+
   autorepeat:
     description: |
       Enables the Linux input system's autorepeat feature on the input device.
@@ -157,6 +164,20 @@ patternProperties:
 
 allOf:
   - $ref: input.yaml
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - microchip,cap1106
+              - microchip,cap1203
+              - microchip,cap1206
+              - microchip,cap1293
+              - microchip,cap1298
+    then:
+      properties:
+        reset-gpios: false
+
   - if:
       properties:
         compatible:
@@ -207,6 +228,8 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
+
     i2c {
       #address-cells = <1>;
       #size-cells = <0>;
@@ -228,6 +251,8 @@ examples:
                          <109>,	/* KEY_PAGEDOWN */
                          <104>;	/* KEY_PAGEUP */
 
+        reset-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+
         #address-cells = <1>;
         #size-cells = <0>;
 
-- 
2.54.0