Add DT binding document for rotary-encoder, keycode options.
Signed-off-by: Donghoon Han <nazgul33@xxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Daniel Mack <daniel@xxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
To: linux-input@xxxxxxxxxxxxxxx
---
.../devicetree/bindings/input/rotary-encoder.txt | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/rotary-encoder.txt b/Documentation/devicetree/bindings/input/rotary-encoder.txt
index f99fe5cdeaec..9986ec2af2d4 100644
--- a/Documentation/devicetree/bindings/input/rotary-encoder.txt
+++ b/Documentation/devicetree/bindings/input/rotary-encoder.txt
@@ -12,6 +12,10 @@ Optional properties:
- rotary-encoder,relative-axis: register a relative axis rather than an
absolute one. Relative axis will only generate +1/-1 events on the input
device, hence no steps need to be passed.
+- rotary-encoder,relative-keys : generate pair of key events. This setting
+ behaves just like relative-axis, generating key events instead.
+ (Keycodes[2] corresponds to -1/1 events.)
+- rotary-encoder,relative-keycodes : keycodes for relative-keys
- rotary-encoder,rollover: Automatic rollover when the rotary value becomes
greater than the specified steps or smaller than 0. For absolute axis only.
- rotary-encoder,steps-per-period: Number of steps (stable states) per period.
@@ -48,3 +52,11 @@ Example:
rotary-encoder,encoding = "binary";
rotary-encoder,rollover;
};
+
+ rotary@2 {
+ compatible = "rotary-encoder";
+ gpios = <&gpio 21 0>, <&gpio 22 0>;
+ rotary-encoder,relative-keys;
+ rotary-encoder,relative-keycode = <103>, <108>;
+ rotary-encoder,steps-per-period = <2>;
+ };
--
2.17.1
