As some devices can produce either low-res or high-res vertical wheel EV_REL events, add a new event to allow userspace to distinguish between them.
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com> --- Documentation/input/event-codes.rst | 16 +++++++++++++--- include/uapi/linux/input-event-codes.h | 1 + 2 files changed, 14 insertions(+), 3 deletions(-) diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst index 92db50954169..0c8591d39bc6 100644 --- a/Documentation/input/event-codes.rst +++ b/Documentation/input/event-codes.rst @@ -185,10 +185,20 @@ instead of EV_REL codes. A few EV_REL codes have special meanings: -* REL_WHEEL, REL_HWHEEL: +* REL_WHEEL: - - These codes are used for vertical and horizontal scroll wheels, - respectively. + - These codes are used for vertical scroll wheels. + + - REL_WHEEL is for normal wheel operational mode, e. g. low-resolution + (line-based) scroll. + + - REL_HIRES_WHEEL should be used when the wheel has two resolutions and it + is in high-resolution mode, e. g. the same angular movement that would + produce a single REL_WHEEL will produce multiple REL_HIRES_WHEEL events. + +* REL_HWHEEL: + + - This code is used for horizontal scroll wheels. EV_ABS ------ diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h index 3af60ee69053..23b2d377af59 100644 --- a/include/uapi/linux/input-event-codes.h +++ b/include/uapi/linux/input-event-codes.h @@ -703,6 +703,7 @@ #define REL_DIAL 0x07 #define REL_WHEEL 0x08 #define REL_MISC 0x09 +#define REL_HIRES_WHEEL 0x0a #define REL_MAX 0x0f #define REL_CNT (REL_MAX+1) -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
