1Rotary encoder DT bindings
2
3Required properties:
4- gpios: a spec for at least two GPIOs to be used, most significant first
5
6Optional properties:
7- linux,axis: the input subsystem axis to map to this rotary encoder.
8  Defaults to 0 (ABS_X / REL_X)
9- rotary-encoder,steps: Number of steps in a full turnaround of the
10  encoder. Only relevant for absolute axis. Defaults to 24 which is a
11  typical value for such devices.
12- rotary-encoder,relative-axis: register a relative axis rather than an
13  absolute one. Relative axis will only generate +1/-1 events on the input
14  device, hence no steps need to be passed.
15- rotary-encoder,rollover: Automatic rollove when the rotary value becomes
16  greater than the specified steps or smaller than 0. For absolute axis only.
17- rotary-encoder,steps-per-period: Number of steps (stable states) per period.
18  The values have the following meaning:
19  1: Full-period mode (default)
20  2: Half-period mode
21  4: Quarter-period mode
22- wakeup-source: Boolean, rotary encoder can wake up the system.
23
24Deprecated properties:
25- rotary-encoder,half-period: Makes the driver work on half-period mode.
26  This property is deprecated. Instead, a 'steps-per-period ' value should
27  be used, such as "rotary-encoder,steps-per-period = <2>".
28
29See Documentation/input/rotary-encoder.txt for more information.
30
31Example:
32
33		rotary@0 {
34			compatible = "rotary-encoder";
35			gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */
36			linux,axis = <0>; /* REL_X */
37			rotary-encoder,relative-axis;
38		};
39
40		rotary@1 {
41			compatible = "rotary-encoder";
42			gpios = <&gpio 21 0>, <&gpio 22 0>;
43			linux,axis = <1>; /* ABS_Y */
44			rotary-encoder,steps = <24>;
45			rotary-encoder,rollover;
46		};
47