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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2015-12-18 17:20:09 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2015-12-18 17:48:50 -0800
commit052876f8e5aec887d22c4d06e54aa5531ffcec75 (patch)
tree4327b502de0d11288b69a48fbf4a4e529949a6e0 /.mailmap
parentf01c5e652ca949722a7fe4cfdecd73e8026971d2 (diff)
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Input: uinput - add new UINPUT_DEV_SETUP and UI_ABS_SETUP ioctl
This adds two new ioctls, UINPUT_DEV_SETUP and UI_ABS_SETUP, that replaces the old device setup method (by write()'ing "struct uinput_user_dev" to the node). The old method is not easily extendable and requires huge payloads. Furthermore, overloading write() without properly versioned objects is error-prone. Therefore, we introduce two new ioctls to replace the old method. These ioctls support all features of the old method, plus a "resolution" field for absinfo. Furthermore, it's properly forward-compatible to new ABS codes and a growing "struct input_absinfo" structure. UI_ABS_SETUP also allows user-space to skip unknown axes if not set. There is no need to copy the whole array temporarily into the kernel, but instead the caller issues several ioctl where we copy each value manually. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Reviewed-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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