• Henrik Rydberg's avatar
    Input: introduce device properties · 85b77200
    Henrik Rydberg authored
    Today, userspace sets up an input device based on the data it emits.
    This is not always enough; a tablet and a touchscreen may emit exactly
    the same data, for instance, but the former should be set up with a
    pointer whereas the latter does not need to. Recently, a new type of
    touchpad has emerged where the buttons are under the pad, which
    changes logic without changing the emitted data. This patch introduces
    a new ioctl, EVIOCGPROP, which enables user access to a set of device
    properties useful during setup. The properties are given as a bitmap
    in the same fashion as the event types, and are also made available
    via sysfs, uevent and /proc/bus/input/devices.
    Acked-by: default avatarPing Cheng <pingc@wacom.com>
    Acked-by: default avatarChase Douglas <chase.douglas@canonical.com>
    Acked-by: default avatarDmitry Torokhov <dtor@mail.ru>
    Signed-off-by: default avatarHenrik Rydberg <rydberg@euromail.se>
    85b77200
evdev.c 21.9 KB