| Rotary encoder DT bindings |
| |
| Required properties: |
| - gpios: a spec for two GPIOs to be used |
| |
| Optional properties: |
| - linux,axis: the input subsystem axis to map to this rotary encoder. |
| Defaults to 0 (ABS_X / REL_X) |
| - rotary-encoder,steps: Number of steps in a full turnaround of the |
| encoder. Only relevant for absolute axis. Defaults to 24 which is a |
| typical value for such devices. |
| - 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,rollover: Automatic rollove when the rotary value becomes |
| greater than the specified steps or smaller than 0. For absolute axis only. |
| - rotary-encoder,half-period: Makes the driver work on half-period mode. |
| - wakeup-source: Boolean, rotary encoder can wake up the system. |
| |
| See Documentation/input/rotary-encoder.txt for more information. |
| |
| Example: |
| |
| rotary@0 { |
| compatible = "rotary-encoder"; |
| gpios = <&gpio 19 1>, <&gpio 20 0>; /* GPIO19 is inverted */ |
| linux,axis = <0>; /* REL_X */ |
| rotary-encoder,relative-axis; |
| }; |
| |
| rotary@1 { |
| compatible = "rotary-encoder"; |
| gpios = <&gpio 21 0>, <&gpio 22 0>; |
| linux,axis = <1>; /* ABS_Y */ |
| rotary-encoder,steps = <24>; |
| rotary-encoder,rollover; |
| }; |