The cypress PS/2 trackpad models supported by the cypress_ps2 driver
emulate BTN_RIGHT events in firmware based on the finger position, as part
of this no motion events are sent when the finger is in the button area.

The INPUT_PROP_BUTTONPAD property is there to indicate to userspace that
BTN_RIGHT events should be emulated in userspace, which is not necessary
in this case.

When INPUT_PROP_BUTTONPAD is advertised userspace will wait for a motion
event before propagating the button event higher up the stack, as it needs
current abs x + y data for its BTN_RIGHT emulation. Since in the
cypress_ps2 pads don't report motion events in the button area, this means
that clicks in the button area end up being ignored, so
INPUT_PROP_BUTTONPAD actually causes problems for these touchpads, and
removing it fixes:

https://bugs.freedesktop.org/show_bug.cgi?id=76341Reported-by: NAdam Williamson <awilliam@redhat.com>
Tested-by: NAdam Williamson <awilliam@redhat.com>
Reviewed-by: NPeter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>.  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

If hardware (or firmware) detects palm on the surface of the device it does
not mean that the data packet is bad from the protocol standpoint. Instead
of reporting PSMOUSE_BAD_DATA in this case simply threat it as if nothing
touches the surface.

BugLink: http://bugs.launchpad.net/bugs/1229361Signed-off-by: NJoseph Salisbury <joseph.salisbury@canonical.com>
Tested-by: NKamal Mostafa <kamal@canonical.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Get rid of unnecessary (void *) casting in 'cypress_init' function.
Signed-off-by: NGeyslan G. Bem <geyslan@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Avoid firmware glitch in Cypress PS/2 Trackpad firmware version 11
(as observed in Dell XPS12) which prevents driver from recognizing
the trackpad.

BugLink: http://launchpad.net/bugs/1103594Signed-off-by: NKamal Mostafa <kamal@canonical.com>
Cc: Dudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This driver, submitted on behalf of Cypress Semiconductor Corporation and
additional contributors, provides support for the Cypress PS/2 Trackpad.

Original code contributed by Dudley Du (Cypress Semiconductor Corporation),
modified by Kamal Mostafa and Kyle Fazzari.

BugLink: http://launchpad.net/bugs/978807Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NKamal Mostafa <kamal@canonical.com>
Signed-off-by: NKyle Fazzari <git@status.e4ward.com>
Signed-off-by: NMario Limonciello <mario_limonciello@dell.com>
Signed-off-by: NTim Gardner <tim.gardner@canonical.com>
Acked-by: NHerton Krzesinski <herton.krzesinski@canonical.com>
Reviewed-by: NHenrik Rydberg <rydberg@euromail.se>
Reviewed-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>