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| author | Henrik Rydberg <rydberg@euromail.se> | 2010-12-18 22:51:13 +0300 |
|---|---|---|
| committer | Henrik Rydberg <rydberg@euromail.se> | 2010-12-20 11:37:33 +0300 |
| commit | 85b7720039fc000b561c20fe2aaa3b54cddae4a7 (patch) | |
| tree | 8fee2c82e215b87699ad6615239752af50ac9310 /drivers/input/evdev.c | |
| parent | 4dd295a73e80b55c3fec25555bf0a5d253023740 (diff) | |
| download | linux-85b7720039fc000b561c20fe2aaa3b54cddae4a7.tar.xz | |
Input: introduce device properties
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: Ping Cheng <pingc@wacom.com>
Acked-by: Chase Douglas <chase.douglas@canonical.com>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index e3f7fc6f9565..0cd97e8f0c9a 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -677,6 +677,10 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, #define EVIOC_MASK_SIZE(nr) ((nr) & ~(_IOC_SIZEMASK << _IOC_SIZESHIFT)) switch (EVIOC_MASK_SIZE(cmd)) { + case EVIOCGPROP(0): + return bits_to_user(dev->propbit, INPUT_PROP_MAX, + size, p, compat_mode); + case EVIOCGKEY(0): return bits_to_user(dev->key, KEY_MAX, size, p, compat_mode); |