diff options
Diffstat (limited to 'Documentation/input')
| -rw-r--r-- | Documentation/input/input.txt | 2 | ||||
| -rw-r--r-- | Documentation/input/rotary-encoder.txt | 9 |
2 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/input/input.txt b/Documentation/input/input.txt index 686ee99..b93c084 100644 --- a/Documentation/input/input.txt +++ b/Documentation/input/input.txt @@ -278,7 +278,7 @@ struct input_event { }; 'time' is the timestamp, it returns the time at which the event happened. -Type is for example EV_REL for relative moment, REL_KEY for a keypress or +Type is for example EV_REL for relative moment, EV_KEY for a keypress or release. More types are defined in include/linux/input.h. 'code' is event code, for example REL_X or KEY_BACKSPACE, again a complete diff --git a/Documentation/input/rotary-encoder.txt b/Documentation/input/rotary-encoder.txt index 435102a..3a6aec4 100644 --- a/Documentation/input/rotary-encoder.txt +++ b/Documentation/input/rotary-encoder.txt @@ -67,7 +67,12 @@ data with it. struct rotary_encoder_platform_data is declared in include/linux/rotary-encoder.h and needs to be filled with the number of steps the encoder has and can carry information about externally inverted -signals (because of used invertig buffer or other reasons). +signals (because of an inverting buffer or other reasons). The encoder +can be set up to deliver input information as either an absolute or relative +axes. For relative axes the input event returns +/-1 for each step. For +absolute axes the position of the encoder can either roll over between zero +and the number of steps or will clamp at the maximum and zero depending on +the configuration. Because GPIO to IRQ mapping is platform specific, this information must be given in seperately to the driver. See the example below. @@ -85,6 +90,8 @@ be given in seperately to the driver. See the example below. static struct rotary_encoder_platform_data my_rotary_encoder_info = { .steps = 24, .axis = ABS_X, + .relative_axis = false, + .rollover = false, .gpio_a = GPIO_ROTARY_A, .gpio_b = GPIO_ROTARY_B, .inverted_a = 0, |