The script "checkpatch.pl" pointed information out like the following:

WARNING: void function return statements are not generally useful

Thus remove such a statement in the affected function.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Instead of using PROPERTY_ENTRY_INTEGER() with explicitly supplied type,
use PROPERTY_ENTRY_U32() dedicated macro.

It will help modify internals of built-in device properties API.

No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

To ease analyzing boot behavior from logs, let's log when we are about to
register the pass-through serio port.

Also, let's drop "Synaptics" prefix from the port name, as RMI4 is good
enough indicator already, and having the prefix means that the name does
not fit into serio->name field. While at it move from hard-coded seio->phys
to one mentioning the sensor ID (such as "rmi4-00.fn03/serio0").
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Currently we register the pass-through serio port when we probe the F03 RMI
function, and then, in sensor configure phase, we unmask interrupts.
Unfortunately this is too late, as other drivers are free probe devices
attached to the serio port as soon as it is probed. Because interrupts are
masked, the IO times out, which may result in not being able to detect
trackpoints on the pass-through port.

To fix the issue we implement open() and close() methods for the
pass-through serio port and unmask interrupts from there. We also move
creation of the pass-through port form probe to configure stage, as RMI
driver does not enable transport interrupt until all functions are probed
(we should change this, but this is a separate topic).

We also try to clear the pending data before unmasking interrupts, because
some devices like to spam the system with multiple 0xaa 0x00 announcements,
which may interfere with us trying to query ID of the device.

Fixes: c5e8848f ("Input: synaptics-rmi4 - add support for F03")
Cc: stable@vger.kernel.org
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

We want to free memory reserved for interrupt mask handling only after we
free functions, as function drivers might want to mask interrupts. This is
needed for the followup patch to the F03 that would implement unmasking and
masking interrupts from the serio pass-through port open() and close()
methods.

Cc: stable@vger.kernel.org
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Use managed resource allocations to simplify error handling during
probing failure and module exiting.

With this all the goto labels in the probe function together with
the cleanups in the remove function are unnecessary, therefore
removed.
Signed-off-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Replace the original license statement with the SPDX identifier.

Update also the copyright owner adding myself as co-owner of the
copyright.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Since AVR32 arch is gone, atmel-wm97xx driver is useless. In theory it
could have been rewritten to work with AT91 devices, but the driver is from
the platform data era, and a bit hard coded to work on AVR32 hardware
variant of the AC97C peripheral, so let's remove it.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Fix small typos in the Instructions and Uploading sections. Fix a typo in
the start/stop effect example usage code.
Signed-off-by: Jean-François Têtu <jean-francois.tetu@savoirfairelinux.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The variable pwr_cmd is being assigned to cyapa->suspend_power_mode
twice, once during the declaration and once after taking an
interruptible mutex lock.  Remove the redundant first assignment
since the value is never read and it is outside the mutex lock.

Cleans up clang warning:
drivers/input/mouse/cyapa.c:743:5: warning: Value stored to 'pwr_cmd'
during its initialization is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Since AVR32 arch is gone, at32psif driver is useless.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Inline macro for MODULE_LICENSE to make the license information easy to
find, eg with grep.  Inline the other module-related macros at the same
time.

A simplified version of the semantic patch for the MODULE_LICENSE
case is as follows: (http://coccinelle.lip6.fr/)

// <smpl>
@s@
identifier i; expression e;
@@

@@
declarer name MODULE_LICENSE;
identifier s.i;
expression s.e;
@@
MODULE_LICENSE(
- i
+ e
 );
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
[dtor: added a couple of drivers missed by the script, removed a few unused
 DRIVER_VERSION macros]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the remaining few input drivers that still used it
(input-polldev and sparse-keymap).
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the misc input drivers.  Along with this, some
DRIVER_VERSION macros were removed as they are also pointless.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the touchscreen drivers.  Along with this, some
DRV_VERSION macros were removed as they are also pointless.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the elan_i2c mouse driver.  Now that this is gone, the
ELAN_DRIVER_VERSION define was also removed as it was pointless.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so remove the use of it
in the pmic8xxx-keyboard driver.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

MODULE_VERSION is useless for in-kernel drivers, so just remove all
usage of it in the rmi4 drivers.  Now that this is gone, the
RMI_DRIVER_VERSION macro was also removed as it was pointless.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

There is no need to #define the license of the driver, just put it in
the MODULE_LICENSE() line directly as a text string.

This allows tools that check that the module license matches the source
code license to work properly, as there is no need to unwind the
unneeded dereference.  For some of these drivers, the #define is just a
few lines above the MODULE_LICENSE() line, which is extra pointless.
Reported-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

input_mt_init_slots() resets the ABS_X/Y fuzz to 0 and expects the driver
to call input_mt_report_pointer_emulation(). That is based on the MT
position bits which are already defuzzed - hence a fuzz of 0.

In the case of synaptics semi-mt devices, we report the ABS_X/Y axes
manually.  This results in the MT position being defuzzed but the
single-touch emulation missing that defuzzing.

Work around this by re-initializing the ABS_X/Y axes after the MT axis to
get the same fuzz value back.

https://bugs.freedesktop.org/show_bug.cgi?id=104533Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

When Synaptics protocol is disabled, we still need to try and detect the
hardware, so we can switch to SMBus device if SMbus is detected, or we know
that it is Synaptics device and reset it properly for the bare PS/2
protocol.

Fixes: c378b511 ("Input: psmouse - factor out common protocol probing code")
Reported-by: Matteo Croce <mcroce@redhat.com>
Tested-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

We should not try to do any i2c transfers before the controller is
resumed (which happens before our resume method gets called).

So we need to disable our IRQ while suspended to enforce this. The
code paths for devices with GPIOs for the int and reset pins already
disable the IRQ the through goodix_free_irq().

This commit also disables the IRQ while suspended for devices without
GPIOs for the int and reset pins.

This fixes the i2c bus sometimes getting stuck after a suspend/resume
causing the touchscreen to sometimes not work after a suspend/resume.
This has been tested on a GPD pocked device.

BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10
BugLink: https://www.reddit.com/r/GPDPocket/comments/7niut2/fix_for_broken_touch_after_resume_all_linux/Tested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The input events use struct timeval to store event time, unfortunately
this structure is not y2038 safe and is being replaced in kernel with
y2038 safe structures.

Because of ABI concerns we can not change the size or the layout of
structure input_event, so we opt to re-interpreting the 'seconds' part
of timestamp as an unsigned value, effectively doubling the range of
values, to year 2106.

Newer glibc that has support for 32 bit applications to use 64 bit
time_t supplies __USE_TIME_BITS64 define [1], that we can use to present
the userspace with updated input_event layout. The updated layout will
cause the compile time breakage, alerting applications and distributions
maintainers to the issue. Existing 32 binaries will continue working
without any changes until 2038.

Ultimately userspace applications should switch to using monotonic or
boot time clocks, as realtime clock is not very well suited for input
event timestamps as it can go backwards (see a80b83b7 "Input: evdev -
add CLOCK_BOOTTIME support" by by John Stultz). With monotonic clock the
practical range of reported times will always fit into the pair of 32
bit values, as we do not expect any system to stay up for a hundred
years without a single reboot.

[1] https://sourceware.org/glibc/wiki/Y2038ProofnessDesignSuggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Patchwork-Id: 10148083
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

On some x86 tablets with a silead touchscreen the windows logo on the
front is a capacitive home button. Touching this button results in a touch
with bits 12-15 of the Y coordinates set, while normally only the lower 12
are used.

Detect this and report a KEY_LEFTMETA press when this happens. Note for
now we only respond to the Y coordinate bits 12-15 containing 0x01, on some
tablets *without* a capacative button I've noticed these bits containing
0x04 when crossing the edges of the screen.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Apart from whitespace differences, this block of macros is repeated
twice:

$ x=./drivers/input/mouse/cyapa_gen3.c; diff -w -u <(sed -n '139,181p' $x) <(sed -n '182,224p' $x)
$
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This duplicate include has been found with scripts/checkincludes.pl but
it has been removed manually to avoid removing false positives.
Signed-off-by: Pravin Shedge <pravin.shedge4linux@gmail.com>
Patchwork-Id: 10092051
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Add hardware version to the firmware file name to handle scenarios where
single system image supports variety of devices.
Signed-off-by: Jeffrey Lin <jeffrey.lin@rad-ic.com>
Patchwork-Id: 10127677
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Fix a spelling mistake: buttong -> button
Signed-off-by: Zhuohua Li <lizhuohua1994@gmail.com>
Patchwork-Id: 10134469
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This driver was merged in 2011 as a tool for detecting the orientation
of a screen. The device driver assumes board file setup using the
platform data from <linux/input/gpio_tilt.h>. But no boards in the
kernel tree defines this platform data.

As I am faced with refactoring drivers to use GPIO descriptors and
pass decriptor tables from boards, or use the device tree device
drivers like these creates a serious problem: I cannot fix them and
cannot test them, not even compile-test them with a system actually
using it (no in-tree boardfile).

I suggest to delete this driver and rewrite it using device tree if
it is still in use on actively maintained systems.

I can also offer to rewrite it out of the blue using device tree if
someone promise to test it and help me iterate it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Patchwork-Id: 10133609
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

struct timeval which is part of struct input_event to maintain the event
times is not y2038 safe.

Real time timestamps are also not ideal for input_event as this time can go
backwards as noted in the patch a80b83b7 by John Stultz.

The patch switches the timestamps to use monotonic time from realtime time.
This is assuming no one is using absolute times from these timestamps.

The structure to maintain input events will be changed in a different
patch.
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Patchwork-Id: 10118255
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

This gets rid of the deprecated do_gettimeofday() call in favor
of ktime_get(), which is also more reliable as it uses monotonic
times. The code now gets a bit simpler.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076621
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

struct timeval is not y2038 safe, and what mlc->instart do is
scheduling a task in a fixed timeout, so jiffies is the
simplest choice here.

In hilse_donode(), the expires in mod_timer equals

	jiffies + intimeout - (now - instart)

If we use jiffies in 'now', the expires equals

	instart + intimeout

So, all we need to do is that making sure expires is a future
timestamp before passed it to mod_timer.

[arnd: slightly simplified patch further]

Link: https://lists.linaro.org/pipermail/y2038/2015-October/000937.htmlSigned-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076615
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Since mlc->lcv_t is only interested in seconds, directly using time64_t
here.

This gets rid of the deprecated do_gettimeofday() and avoids problems
with time going backwards since we now use the monotonic clocksource.
Signed-off-by: WEN Pingbo <pingbo.wen@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Patchwork-Id: 10076611
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 114761
Addresses-Coverity-ID: 114762
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 114763
Addresses-Coverity-ID: 114764
Addresses-Coverity-ID: 114765
Addresses-Coverity-ID: 114766
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Addresses-Coverity-ID: 114767
Addresses-Coverity-ID: 114768
Addresses-Coverity-ID: 114769
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

We have to unlock before returning if input_allocate_device() fails.

Fixes: 04ce40a6 ("Input: uinput - remove uinput_allocate_device()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

The S6SY761 touchscreen is a capicitive multi-touch controller
for mobile use. It's connected with i2c at the address 0x48.

This commit provides a basic version of the driver which can
handle only initialization, touch events and power states.

The controller is controlled by a firmware which, in the version
I currently have, doesn't provide all the possible
functionalities mentioned in the datasheet.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>