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 <mchehab@xxxxxxxxxxxxxxxx> --- Documentation/input/event-codes.txt | 17 ++++++++++++++--- include/uapi/linux/input-event-codes.h | 1 + 2 files changed, 15 insertions(+), 3 deletions(-) diff --git a/Documentation/input/event-codes.txt b/Documentation/input/event-codes.txt index 575415f4cef0..50352ab5f6d4 100644 --- a/Documentation/input/event-codes.txt +++ b/Documentation/input/event-codes.txt @@ -156,9 +156,20 @@ instead of EV_REL codes. A few EV_REL codes have special meanings: -* REL_WHEEL, REL_HWHEEL: - - These codes are used for vertical and horizontal scroll wheels, - respectively. +* REL_WHEEL: + + - 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 444956ba832c..da48d4079511 100644 --- a/include/uapi/linux/input-event-codes.h +++ b/include/uapi/linux/input-event-codes.h @@ -710,6 +710,7 @@ #define REL_MISC_4 0x0d #define REL_MISC_5 0x0e #define REL_MISC_6 0x0f +#define REL_HIRES_WHEEL 0x10 #define REL_MAX 0x1f #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 majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
