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    Subject[PATCH 8/9 v4] Input: add BTN_TOOL_QUINTTAP for reporting 5 fingers on touchpad
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    "4-finger scroll" is a gesture supported by some applications and
    operating systems.

    "Resting thumb" is when a clickpad user rests a finger (e.g., a
    thumb), in a "click zone" (typically the bottom of the touchpad) in
    anticipation of click+move=select gestures.

    Thus, "4-finger scroll + resting thumb" is a 5-finger gesture.
    To allow userspace to detect this gesture, we send BTN_TOOL_QUINTTAP.

    Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
    Acked-by: Chase Douglas <chase.douglas@canonical.com>
    ---
    drivers/input/input-mt.c | 1 +
    include/linux/input.h | 1 +
    2 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/drivers/input/input-mt.c b/drivers/input/input-mt.c
    index c48c81f..9150ee7 100644
    --- a/drivers/input/input-mt.c
    +++ b/drivers/input/input-mt.c
    @@ -117,6 +117,7 @@ void input_mt_report_finger_count(struct input_dev *dev, int count)
    input_event(dev, EV_KEY, BTN_TOOL_DOUBLETAP, count == 2);
    input_event(dev, EV_KEY, BTN_TOOL_TRIPLETAP, count == 3);
    input_event(dev, EV_KEY, BTN_TOOL_QUADTAP, count == 4);
    + input_event(dev, EV_KEY, BTN_TOOL_QUINTTAP, count == 5);
    }
    EXPORT_SYMBOL(input_mt_report_finger_count);

    diff --git a/include/linux/input.h b/include/linux/input.h
    index 068784e..4de4b46 100644
    --- a/include/linux/input.h
    +++ b/include/linux/input.h
    @@ -503,6 +503,7 @@ struct input_keymap_entry {
    #define BTN_TOOL_FINGER 0x145
    #define BTN_TOOL_MOUSE 0x146
    #define BTN_TOOL_LENS 0x147
    +#define BTN_TOOL_QUINTTAP 0x148 /* Five fingers on trackpad */
    #define BTN_TOUCH 0x14a
    #define BTN_STYLUS 0x14b
    #define BTN_STYLUS2 0x14c
    --
    1.7.3.1


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