[PATCH v1 3/6] dt-bindings: mediatek,mt6779-keypad: add mediatek,double-keys

Mattijs Korpershoek
2022-07-20T14:48:59Z

MediaTek keypad has 2 modes of detecting key events:
- single key: each (row, column) can detect one key
- double key: each (row, column) is a group of 2 keys

Currently, only single key detection is supported (by default)
Add an optional property, mediatek,double-keys to support double
key detection.

Double key support exists to minimize cost, since it reduces the number
of pins required for physical keys.

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

diff --git a/Documentation/devicetree/bindings/input/mediatek,mt6779-keypad.yaml b/Documentation/devicetree/bindings/input/mediatek,mt6779-keypad.yaml
index ca8ae40a73f7..03c9555849e5 100644
--- a/Documentation/devicetree/bindings/input/mediatek,mt6779-keypad.yaml
+++ b/Documentation/devicetree/bindings/input/mediatek,mt6779-keypad.yaml
@@ -49,6 +49,12 @@ properties:
maximum: 256
default: 16

+ mediatek,double-keys:
+ description: |
+ use double key matrix instead of single key
+ when set, each (row,column) is a group that can detect 2 keys
+ type: boolean
+
required:
- compatible
- reg

--
b4 0.10.0-dev-54fef