[PATCH v4 1/2] dt-bindings: input: Add PixArt PAJ7620 gesture sensor

[Harpreet Saini <sainiharpreet29@yahoo.com>]

Add Device Tree bindings for Pixart PAJ7620 gesture sensor.
The sensor supports 9 hand gestures via I2C interface.

The GPIO controller properties are included to describe the
hardware's ability to repurpose SPI pins as GPIOs when the
sensor is used in I2C mode.

Signed-off-by: Harpreet Saini <sainiharpreet29@yahoo.com>
---
 .../bindings/input/pixart,paj7620.yaml        | 84 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 2 files changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/pixart,paj7620.yaml

diff --git a/Documentation/devicetree/bindings/input/pixart,paj7620.yaml b/Documentation/devicetree/bindings/input/pixart,paj7620.yaml
new file mode 100644
index 000000000000..089e864e82ea
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/pixart,paj7620.yaml
@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/pixart,paj7620.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PixArt PAJ7620 Gesture Sensor
+
+maintainers:
+  - Harpreet Saini <sainiharpreet29@yahoo.com>
+
+description:
+  The PixArt PAJ7620 is a gesture recognition sensor with an integrated
+  infrared LED and CMOS array. It communicates over an I2C interface and
+  provides gesture data via a dedicated interrupt pin. When operating in
+  I2C mode, the unused SPI pins can be repurposed as GPIOs.
+
+allOf:
+  - $ref: input.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: pixart,paj7620
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Main power supply.
+
+  vbus-supply:
+    description: I/O and I2C bus power supply.
+
+  vled-supply:
+    description: Power for the integrated IR LED.
+
+  linux,keycodes:
+    minItems: 9
+    maxItems: 9
+    description:
+      List of keycodes mapping to the 9 supported gestures.
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - vdd-supply
+  - vbus-supply
+  - vled-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/input/input.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gesture@73 {
+            compatible = "pixart,paj7620";
+            reg = <0x73>;
+            interrupt-parent = <&gpio>;
+            interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
+            vdd-supply = <&reg_3v3>;
+            vbus-supply = <&reg_1v8>;
+            vled-supply = <&reg_3v3>;
+            linux,keycodes = <KEY_UP KEY_DOWN KEY_LEFT KEY_RIGHT
+                             KEY_ENTER KEY_BACK KEY_NEXT KEY_PREVIOUS
+                             KEY_MENU>;
+            gpio-controller;
+            #gpio-cells = <2>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index ee7fd3cfe203..d73a0bf62b62 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1273,6 +1273,8 @@ patternProperties:
     description: Pine64
   "^pineriver,.*":
     description: Shenzhen PineRiver Designs Co., Ltd.
+  "^pixart,.*":
+    description: PixArt Imaging Inc.
   "^pixcir,.*":
     description: PIXCIR MICROELECTRONICS Co., Ltd
   "^plantower,.*":
-- 
2.43.0