From: Harry Cutts Date: Thu, 30 Aug 2018 21:56:18 +0000 (-0700) Subject: Input: Add the `REL_WHEEL_HI_RES` event code X-Git-Tag: v5.15~7760^2~2^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aaf9978c3c0291ef3beaa97610bc9c3084656a85;p=platform%2Fkernel%2Flinux-starfive.git Input: Add the `REL_WHEEL_HI_RES` event code This event code represents scroll reports from high-resolution wheels, and will be used by future patches in this series. See the linux-input "Reporting high-resolution scroll events" thread [0] for more details. [0]: https://www.spinics.net/lists/linux-input/msg57380.html Signed-off-by: Harry Cutts Acked-by: Dmitry Torokhov Reviewed-by: Benjamin Tissoires Signed-off-by: Jiri Kosina --- diff --git a/Documentation/input/event-codes.rst b/Documentation/input/event-codes.rst index a8c0873..cef220c 100644 --- a/Documentation/input/event-codes.rst +++ b/Documentation/input/event-codes.rst @@ -190,7 +190,16 @@ A few EV_REL codes have special meanings: * REL_WHEEL, REL_HWHEEL: - These codes are used for vertical and horizontal scroll wheels, - respectively. + respectively. The value is the number of "notches" moved on the wheel, the + physical size of which varies by device. For high-resolution wheels (which + report multiple events for each notch of movement, or do not have notches) + this may be an approximation based on the high-resolution scroll events. + +* REL_WHEEL_HI_RES: + + - If a vertical scroll wheel supports high-resolution scrolling, this code + will be emitted in addition to REL_WHEEL. The value is the (approximate) + distance travelled by the user's finger, in microns. EV_ABS ------ diff --git a/include/uapi/linux/input-event-codes.h b/include/uapi/linux/input-event-codes.h index 53fbae2..dad8d38 100644 --- a/include/uapi/linux/input-event-codes.h +++ b/include/uapi/linux/input-event-codes.h @@ -708,6 +708,7 @@ #define REL_DIAL 0x07 #define REL_WHEEL 0x08 #define REL_MISC 0x09 +#define REL_WHEEL_HI_RES 0x0a #define REL_MAX 0x0f #define REL_CNT (REL_MAX+1)