Lenovo use two different trackpoints in the fifth generation Thinkpad X1
Carbon. Both are accessible over SMBUS/RMI but the pnpIDs are missing.
This patch is for the Elantech trackpoint specifically which also
reports SMB version 3 so rmi_smbus needs to be updated in order to
handle it.
For the record, I was not the first one to come up with this patch as it
has been floating around the internet for a while now. However, I have
spent significant time with testing and my efforts to find the original
author of the patch have been unsuccessful.
Signed-off-by: Edvard Holst <edvard.holst@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The touchpad on Lenovo Carbon X1 Gen 5 (2017 - Kabylake) is accessible over
SMBUS/RMI, so let's activate it by default.
Cc: stable@vger.kernel.org
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Commit af503716ac14 ("i2c: core: report OF style module alias for devices
registered via OF") fixed how the I2C core reports the module alias when
devices are registered via OF.
But the atmel_mxt_ts driver only has an "atmel,maxtouch" compatible in its
OF device ID table, so if a Device Tree is using a different one, autoload
won't be working for the module (the matching works because the I2C device
ID table is used as a fallback).
So add compatible strings for each of the entries in the I2C device table.
Fixes: af503716ac14 ("i2c: core: report OF style module alias for devices registered via OF")
Reported-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
[dtor: document which compatibles are deprecated and should not be used]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The automatic update mechanism will trigger an update if the
info block CRCs are different between maxtouch configuration
file (maxtouch.cfg) and chip.
The driver compared the CRCs without retrieving the chip CRC,
resulting always in a failure and firmware flashing action
triggered. Fix this issue by retrieving the chip info block
CRC before the check.
Note that this solution has the benefit that by reading the
information block and the object table into a contiguous region
of memory, we can verify the checksum at probe time. This means
we make sure that we are indeed talking to a chip that supports
object protocol correctly.
Using this patch on a kevin chromebook, the touchscreen and
touchpad drivers are able to match the CRC:
atmel_mxt_ts 3-004b: Family: 164 Variant: 14 Firmware V2.3.AA Objects: 40
atmel_mxt_ts 5-004a: Family: 164 Variant: 17 Firmware V2.0.AA Objects: 31
atmel_mxt_ts 3-004b: Resetting device
atmel_mxt_ts 5-004a: Resetting device
atmel_mxt_ts 3-004b: Config CRC 0x573E89: OK
atmel_mxt_ts 3-004b: Touchscreen size X4095Y2729
input: Atmel maXTouch Touchscreen as /devices/platform/ff130000.i2c/i2c-3/3-004b/input/input5
atmel_mxt_ts 5-004a: Config CRC 0x0AF6BA: OK
atmel_mxt_ts 5-004a: Touchscreen size X1920Y1080
input: Atmel maXTouch Touchpad as /devices/platform/ff140000.i2c/i2c-5/5-004a/input/input6
Signed-off-by: Nick Dyer <nick.dyer@shmanahar.org>
Acked-by: Benson Leung <bleung@chromium.org>
[Ezequiel: minor patch massage]
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch adds the correct platform data information for the Caroline
Chromebook, so that the mouse button does not get stuck in pressed state
after the first click.
The Samus button keymap and platform data definition are the correct
ones for Caroline, so they have been reused here.
Signed-off-by: Vittorio Gambaletta <linuxbugs@vittgam.net>
Signed-off-by: Salvatore Bellizzi <lkml@seppia.net>
Tested-by: Guenter Roeck <groeck@chromium.org>
Cc: stable@vger.kernel.org
[dtor: adjusted vendor spelling to match shipping firmware]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch fixes a spelling error found in Kconfig.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
UI_SET_LEDBIT ioctl() causes the following KASAN splat when used with
led > LED_CHARGING:
[ 1274.663418] BUG: KASAN: slab-out-of-bounds in input_leds_connect+0x611/0x730 [input_leds]
[ 1274.663426] Write of size 8 at addr ffff88003377b2c0 by task ckb-next-daemon/5128
This happens because we were writing to the led structure before making
sure that it exists.
Reported-by: Tasos Sahanidis <tasos@tasossah.com>
Tested-by: Tasos Sahanidis <tasos@tasossah.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
When extending the rmi_spi buffers, we must check that no out of memory
error occurs, otherwise we may access data above the currently allocated
memory.
Propagate the error code returned by 'rmi_spi_manage_pools()' instead.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The touch sensor buttons on Sony VAIO VGN-CS series laptops (e.g.
VGN-CS31S) are a separate PS/2 device. As the MUX is disabled for all
VAIO machines by the nomux blacklist, the data from touch sensor
buttons and touchpad are combined. The protocol used by the buttons is
probably similar to the touchpad protocol (both are Synaptics) so both
devices get enabled. The controller combines the data, creating a mess
which results in random button clicks, touchpad stopping working and
lost sync error messages:
psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 4
psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1
psmouse serio1: issuing reconnect request
Add a new i8042_dmi_forcemux_table whitelist with VGN-CS.
With MUX enabled, touch sensor buttons are detected as separate device
(and left disabled as there's currently no driver), fixing all touchpad
problems.
Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Because I will be leaving Samsung soon, for reachability update
my reference e-mail to etezian.org.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Executing stmfts_power_on() function lasts over 2 seconds, what
significantly slows down the boot and resume processes if driver is
compiled in. Avoid this delay by forcing this driver to be probed
and suspended/resumed asynchronously.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The primary interface for the touchpad device in Thinkpad L570 is SMBus,
so ALPS overlooked PS2 interface Firmware setting of TrackStick, and
shipped with TrackStick otp bit is disabled.
The address 0xD7 contains device number information, so we can identify
the device by checking this value, but to access it we need to enable
Command mode, and then re-enable the device. Devices shipped in Thinkpad
L570 report either 0x0C or 0x1D as device numbers, if we see them we assume
that the devices are DualPoints.
The same issue exists on Dell Latitude 7370.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196929
Fixes: 646580f793 ("Input: ALPS - fix multi-touch decoding on SS4 plus touchpads")
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Tested-by: Aaron Ma <aaron.ma@canonical.com>
Tested-by: Jonathan Liu <net147@gmail.com>
Tested-by: Jaak Ristioja <jaak@ristioja.ee>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Adds support for a PDP Xbox One controller with device ID
(0x06ef:0x02a4). The Product string for this device is "PDP Wired
Controller for Xbox One - Stealth Series | Phantom Black".
Signed-off-by: Francis Therien <frtherien@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
ALPS v3 and v7 packet formats reports trackstick pressure. This information
is already parsed in unused "z" variable.
ALPS SS4 S2 devices already reports trackstick pressure as ABS_PRESSURE
attribute, therefore reports pressure in the same way also for v3 and v7.
This patch also updates parsing v3 pressure information, it is also stored
in 7 bits.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This driver let you plug in your RC controller to the adapter and
use it as input device in various RC simulators.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
If the device is unused and suspended, a call to open will cause the
device to autoresume through the call to usb_autopm_get_interface().
input_dev->users is already incremented by the input subsystem,
therefore this expression will always be evaluated to true:
if (input->users || usbtouch->type->irq_always)
result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
The same URB will then be fail when resubmitted in usbtouch_open().
Introduce usbtouch->is_open to keep track of the state instead.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
usb_autopm_get_interface() that is called in usbtouch_open() does an
autoresume if the device is suspended.
input_dev->mutex used in usbtouch_resume() is in this case already
taken by the input subsystem and will cause a deadlock.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
If the device is unused and suspended, a call to open will cause the
device to autoresume through the call to usb_autopm_get_interface().
input_dev->users is already incremented by the input subsystem,
therefore this expression will always be evaluated to true:
if (pegasus->dev->users && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0)
retval = -EIO;
The same URB will then be fail when resubmitted in pegasus_open().
Introduce pegasus->is_open to keep track of the state instead.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
usb_autopm_get_interface() that is called in pegasus_open() does an
autoresume if the device is suspended.
input_dev->mutex used in pegasus_resume() is in this case already
taken by the input subsystem and will cause a deadlock.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
If the device is unused and suspended, a call to open will cause the
device to autoresume through the call to usb_autopm_get_interface().
input_dev->users is already incremented by the input subsystem,
therefore this expression will always be evaluated to true:
if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
retval = -EIO;
}
The same URB will then be fail when resubmitted in synusb_open().
Introduce synusb->is_open to keep track of the state instead.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
usb_autopm_get_interface() that is called in synusb_open() does an
autoresume if the device is suspended.
input_dev->mutex used in synusb_resume() is in this case already
taken by the input subsystem and will cause a deadlock.
Signed-off-by: Marcus Folkesson <marcus.folkesson@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Add support for specifying event actions to trigger wakeup when using
the gpio-keys input device as a wakeup source.
This would allow the device to configure when to wakeup the system. For
example a gpio-keys input device for pen insert, may only want to wakeup
the system when ejecting the pen.
Suggested-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Assign true or false to boolean variables instead of an integer value.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit add ACPI support for Chuwi Hi8 tablet. On the ACPI table of
the tablet, GSL1680 is registered as MSSL0001, so the driver does not
recognize the device. This commit resolve it.
Signed-off-by: Shohei Maruyama <cheat.sc.linux@outlook.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The analog joystick driver spits a warning at us:
drivers/input/joystick/analog.c:176:2: warning: #warning Precise timer
not defined for this architecture.
PPC has get_cycles() so use that.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
In preparation to enabling -Wvla, remove VLA and replace it with a
fixed-length array instead.
Fixed as part of the directive to remove all VLAs from the kernel:
https://lkml.org/lkml/2018/3/7/621
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reset i8042 before probing because of insufficient BIOS initialisation of
the i8042 serial controller. This makes Synaptics touchpad detection
possible. Without resetting the Synaptics touchpad is not detected because
there are always NACK messages from AUX port.
Signed-off-by: Dennis Wassenberg <dennis.wassenberg@secunet.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v4.16-rc4' into next
Sync up with mainline to bring in RAVE MFD device core.
This reverts commit 48282969826b3d3c76e908182f69724d86d995fe which
caused the following issues:
1. On T460p with BIOS version 2.22 touchpad and trackpoint stop working
after suspend-resume cycle. Due to strange state of the device another
suspend is impossible.
The following dmesg errors can be observed:
thinkpad_acpi: EC reports that Thermal Table has changed
rmi4_smbus 7-002c: failed to get SMBus version number!
rmi4_physical rmi4-00: rmi_driver_reset_handler: Failed to read current IRQ mask.
rmi4_f01 rmi4-00.fn01: Failed to restore normal operation: -16.
rmi4_f01 rmi4-00.fn01: Resume failed with code -16.
rmi4_physical rmi4-00: Failed to suspend functions: -16
rmi4_smbus 7-002c: Failed to resume device: -16
PM: resume devices took 0.640 seconds
rmi4_f03 rmi4-00.fn03: rmi_f03_pt_write: Failed to write to F03 TX register (-16).
rmi4_physical rmi4-00: rmi_driver_clear_irq_bits: Failed to change enabled interrupts!
rmi4_physical rmi4-00: rmi_driver_set_irq_bits: Failed to change enabled interrupts!
psmouse: probe of serio3 failed with error -1
2. On another T460p with BIOS version 2.15 two finger scrolling gesture
on the touchpad stops working after suspend-resume cycle (about 75%
reproducibility, when it still works, the scrolling gesture becomes
laggy). Nothing suspicious appears in the dmesg.
Analysis form Richard Schütz:
"RMI is unreliable on the ThinkPad T460p because the device is affected
by the firmware behavior addressed in a7ae81952cda ("i2c: i801: Allow
ACPI SystemIO OpRegion to conflict with PCI BAR")."
The affected devices often show:
i801_smbus 0000:00:1f.4: BIOS is accessing SMBus registers
i801_smbus 0000:00:1f.4: Driver SMBus register access inhibited
Reported-by: Richard Schütz <rschuetz@uni-koblenz.de>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Tested-by: Martin Peres <martin.peres@linux.intel.com>
Tested-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This is the mindless scripted replacement of kernel use of POLL*
variables as described by Al, done by this script:
for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
done
with de-mangling cleanups yet to come.
NOTE! On almost all architectures, the EPOLL* constants have the same
values as the POLL* constants do. But they keyword here is "almost".
For various bad reasons they aren't the same, and epoll() doesn't
actually work quite correctly in some cases due to this on Sparc et al.
The next patch from Al will sort out the final differences, and we
should be all done.
Scripted-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If matrix_keypad_stop() is executing and the keypad interrupt is triggered,
disable_row_irqs() may be called by both matrix_keypad_interrupt() and
matrix_keypad_stop() at the same time, causing interrupts to be disabled
twice and the keypad being "stuck" after resuming.
Take lock when setting keypad->stopped to ensure that ISR will not race
with matrix_keypad_stop() disabling interrupts.
Signed-off-by: Zhang Bo <zbsdta@126.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
We do not need to call ps2_command() several times in a row, transmitting
every byte as it were a command byte, we can often pack it all in a single
command.
Also, now that ps2_command() handles retransmission, we do not need to do
it ourselves in trackpoint_power_on_reset().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
When we probe PS/2 devices we first issue "Get ID" command and only if we
receive what we consider a valid keyboard or mouse ID we disable the device
and continue with protocol detection. That means that the device may be
transmitting motion or keystroke data, while we expect ACK response.
Instead of signaling failure if we see anything but ACK/NAK let's ignore
"garbage" response until we see ACK for the command byte (first byte). The
checks for subsequent ACKs of command parameters will continue be strict.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The devices are allowed to respond to either command byte or command
parameter with a NAK (0xfe), and the host is supposed to resend the
"correct" byte. The device then will either respond with ACK or ERR (0xfc).
Let's teach libps2 to handle the NAK responses properly, so that individual
drivers do not need to handle them.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Debugging via i8042.debug and analyzing raw PS/2 data stream may be
cumbersome as you need to locate the boundaries of commands, decipher the
sliced commands, etc, etc. Let's add a bit more high level debug statements
for ps2_sendbyte(), ps2_command(), and ps2_sliced_command().
We do not introduce a new module parameter, but rater rely on the kernel
having dynamic debug facility enabled (which most everyone has nowadays).
Enable with:
echo "file libps2.c +pf" > /sys/kernel/debug/dynamic_debug/control
or add "libps2.dyndbg=+pf" to the kernel command line.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
In preparation to adding some debugging statements to PS/2 control
sequences let's move psmouse_sliced_command() into libps2 and rename it
to ps2_sliced_command().
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Instead of using unsigned char for the byte data switch to using u8. Also
use unsigned int for the command codes and timeouts, and have
ps2_handle_ack() and ps2_handle_response() return bool instead of int, as
they do not return error codes but rather signal whether a byte was handled
or not handled. ps2_is_keyboard_id() now returns bool as well.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Individual labels of switch statements should have the same indentation
level as the switch statement itself.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This Far-Eastern company's PS/2 mice use a deviant format for the data
relating to movement of the scroll wheels for, at least, their dual wheel
mice, such as their "Optical GreatEye Wheelmouse" model "WOP-35". This
product has five "buttons" (one of which is the click action on the first
wheel) and TWO scroll wheels. However for a byte comprising d0-d7 instead
of setting one of d6-7 in the forth byte of the mouse data packet and a
twos complement number of scroll steps in the remaining d5-d0 (or d3-d0
should there be a fourth (BTN_SIDE - d4) or fifth (BTN_EXTRA - d5) button
to report; they only report a single +/- event for each wheel and use a bit
pattern that corresponds to +/-1 for the first wheel and +/- 2 for the
second in the lower nibble of the fourth byte.
The effect with existing code is that the second mouse wheel merely repeats
the effect of the first but providing two steps per click rather than the
one of the first wheel - so there is no HORIZONTAL scroll wheel movement
detected from the device as far as the rest of the kernel sees it.
This patch, if enabled by the "a4tech_workaround" module parameter modifies
the handling just for mice of type PSMOUSE_IMEX so that the second scroll
wheel movement gets correctly reported as REL_HWHEEL events. Should this
module parameter be activated for other mice of the same PSMOUSE_IMEX type
then it is possible that at the point where the mouse reports more than a
single movement step the user may start seeing horizontal rather than
vertical wheel events, but should the movement steps get to be more than
two at a time the hack will get immediately deactivated and the behaviour
will revert to the past code.
This was discussed around *fifteen* *years* *ago* on the LKML and the best
summary is in post https://lkml.org/lkml/2002/7/18/111 "Re: PS2 Input Core
Support" by Vojtech Pavlik. I was not able to locate any discussion later
than this on this topic.
Given that most users of the "psmouse" module will NOT want this additional
feature enabled I have taken the apparently erroneous step of defaulting
the module parameter that enables it to be "disabled" - this functionality
may interfere with the operation of "normal" mice of this type (until a
large enough scroll wheel movement is detected) so I cannot see how it
would want to be enabled for "normal" users - i.e. everyone without this
brand of mouse.
I am using this patch at the moment and I can confirm that it is working
for me as both a module and compiled into the kernel for my mouse that is
of the type (WOP-35) described - I note that it is still available from
certain on-line retailers and that the manufacturers site does not list
GNU/Linux as being supported on the product page - this patch however does
enable full use of this product:
http://www.a4tech.com/product.asp?cid=3D1&scid=3D8&id=3D22
Signed-off-by: Stephen Lyons <slysven@virginmedia.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
- use u8 instead of unsigned char for byte data
- use input_set_capability() instead of manipulating capabilities bits
directly
- do not abuse -1 as error code, propagate errors from various calls.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
- switch to using BIT() macros
- use u8 instead of unsigned char for byte data
- use input_set_capability() instead of manipulating capabilities bits
directly
- use sign_extend32() when extracting wheel data.
- do not abuse -1 as error code, propagate errors from various calls.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
- switch to using BIT() macros
- use u8 instead of unsigned char for byte data
- use input_set_capability() instead of manipulating capabilities bits
directly
- use sign_extend32() when extracting wheel data.
- do not abuse -1 as error code, propagate errors from various calls.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Many protocol driver re-implement code to parse buttons or motion data from
the standard PS/2 protocol. Let's split the parsing into separate
functions and reuse them in protocol drivers.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Replace the original license statement with the SPDX identifier.
Add also one line of description as recommended by the COPYING
file.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
