[PATCH v12 1/2] dt-bindings: input: bindings for Adafruit Seesaw Gamepad

[Anshul Dalal <anshulusr@gmail.com>]

Adds bindings for the Adafruit Seesaw Gamepad.

The gamepad functions as an i2c device with the default address of 0x50
and has an IRQ pin that can be enabled in the driver to allow for a rising
edge trigger on each button press or joystick movement.

Product page:
  https://www.adafruit.com/product/5743
Arduino driver:
  https://github.com/adafruit/Adafruit_Seesaw

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Anshul Dalal <anshulusr@gmail.com>

---

Changes for v11,12:
- no updates

Changes for v10:
- Added interrupt-controller/irq.h header

Changes for v9:
- Added interrupt in example

Changes for v8:
- no updates

Changes for v7:
- no updates

Changes for v6:
- no updates

Changes for v5:
- Added link to the datasheet

Changes for v4:
- Fixed the URI for the id field
- Added `interrupts` property

Changes for v3:
- Updated id field to reflect updated file name from previous version
- Added `reg` property

Changes for v2:
- Renamed file to `adafruit,seesaw-gamepad.yaml`
- Removed quotes for `$id` and `$schema`
- Removed "Bindings for" from the description
- Changed node name to the generic name "joystick"
- Changed compatible to 'adafruit,seesaw-gamepad' instead of
  'adafruit,seesaw_gamepad'

Previous versions:
v11: https://lore.kernel.org/lkml/20231215031125.284939-1-anshulusr@gmail.com/
v10: https://lore.kernel.org/lkml/20231121123409.2231115-1-anshulusr@gmail.com/
v9: https://lore.kernel.org/lkml/20231121101751.2189965-1-anshulusr@gmail.com/
v8: https://lore.kernel.org/lkml/20231108005337.45069-1-anshulusr@gmail.com/
v7: https://lore.kernel.org/lkml/20231106164134.114668-1-anshulusr@gmail.com/
v6: https://lore.kernel.org/lkml/20231027051819.81333-1-anshulusr@gmail.com/
v5: https://lore.kernel.org/lkml/20231017034356.1436677-1-anshulusr@gmail.com/
v4: https://lore.kernel.org/lkml/20231010184827.1213507-1-anshulusr@gmail.com/
v3: https://lore.kernel.org/linux-input/20231008185709.2448423-1-anshulusr@gmail.com/
v2: https://lore.kernel.org/linux-input/20231008172435.2391009-1-anshulusr@gmail.com/
v1: https://lore.kernel.org/linux-input/20231007144052.1535417-1-anshulusr@gmail.com/
---
 .../input/adafruit,seesaw-gamepad.yaml        | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml

diff --git a/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml
new file mode 100644
index 000000000000..5e86f6de6978
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/adafruit,seesaw-gamepad.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/adafruit,seesaw-gamepad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Adafruit Mini I2C Gamepad with seesaw
+
+maintainers:
+  - Anshul Dalal <anshulusr@gmail.com>
+
+description: |
+  Adafruit Mini I2C Gamepad
+
+    +-----------------------------+
+    |   ___                       |
+    |  /   \               (X)    |
+    | |  S  |  __   __  (Y)   (A) |
+    |  \___/  |ST| |SE|    (B)    |
+    |                             |
+    +-----------------------------+
+
+  S -> 10-bit precision bidirectional analog joystick
+  ST -> Start
+  SE -> Select
+  X, A, B, Y -> Digital action buttons
+
+  Datasheet: https://cdn-learn.adafruit.com/downloads/pdf/gamepad-qt.pdf
+  Product page: https://www.adafruit.com/product/5743
+  Arduino Driver: https://github.com/adafruit/Adafruit_Seesaw
+
+properties:
+  compatible:
+    const: adafruit,seesaw-gamepad
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description:
+      The gamepad's IRQ pin triggers a rising edge if interrupts are enabled.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        joystick@50 {
+            compatible = "adafruit,seesaw-gamepad";
+            interrupts = <18 IRQ_TYPE_EDGE_RISING>;
+            reg = <0x50>;
+        };
+    };
-- 
2.43.0