Adds support for the Dialog DA7280 LRA/ERM Haptic Driver with
multiple mode and integrated waveform memory and wideband support.
It communicates via an I2C bus to the device.
Signed-off-by: NRoy Im <roy.im.opensource@diasemi.com>
Reviewed-by: Jes Sorensen <Jes.Sorensen@gmail.com>.
Link: https://lore.kernel.org/r/1e293e8c4830b09255af3b7e1721b73afaefdfa3.1606320459.git.Roy.Im@diasemi.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add device tree binding information for DA7280 haptic driver.
Example bindings for DA7280 are added.
Signed-off-by: NRoy Im <roy.im.opensource@diasemi.com>
Reviewed-by: Rob Herring <robh@kernel.org>.
Link: https://lore.kernel.org/r/2bc9a4a9d083ea8f360ec75f6281b6de6c4ef284.1606320459.git.Roy.Im@diasemi.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This patch adds the da7280 bindings doc and driver to the Dialog
Semiconductor support list.
Signed-off-by: NRoy Im <roy.im.opensource@diasemi.com>
Link: https://lore.kernel.org/r/e2a01173699486519f8da85b9283c6af8481fbdb.1606320459.git.Roy.Im@diasemi.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

There are some version of Elan trackpads that send incorrect data when
in SMbus mode, unless they are switched to use 0x5f reports instead of
standard 0x5e. This patch implements querying device to retrieve chips
identifying data, and switching it, when needed to the alternative
report.
Signed-off-by: NJingle Wu <jingle.wu@emc.com.tw>
Link: https://lore.kernel.org/r/20201211071531.32413-1-jingle.wu@emc.com.twSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The 0x5F is a new trackpoint report type used by some modules.
Signed-off-by: NJingle Wu <jingle.wu@emc.com.tw>
Link: https://lore.kernel.org/r/20201211071511.32349-1-jingle.wu@emc.com.twSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add information found in downstream kernels, to make the code less
magic.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: NDmitry Osipenko <digetx@gmail.com>
Tested-by: NDmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/728fff020bc92be10d84cc2a7ea8af6fd99af96c.1607669375.git.mirq-linux@rere.qmqm.plSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Simplify the return expression.
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201210135943.1612-1-zhengyongjun3@huawei.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add COMPILE_TEST support to imx_keypad driver for better compile
testing coverage.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1583137573-16628-1-git-send-email-Anson.Huang@nxp.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In a recent change to the SPI subsystem [1], a new `delay` struct was added
to replace the `delay_usecs`. This change replaces the current
`delay_usecs` with `delay` for this driver.

The `spi_transfer_delay_exec()` function [in the SPI framework] makes sure
that both `delay_usecs` & `delay` are used (in this order to preserve
backwards compatibility).

[1] commit bebcfd27 ("spi: introduce `delay` field for
`spi_transfer` + spi_transfer_delay_exec()")
Signed-off-by: NSergiu Cuciurean <sergiu.cuciurean@analog.com>
Tested-by: NRonald Tschalär <ronald@innovation.ch>
Reviewed-by: NRonald Tschalär <ronald@innovation.ch>
Link: https://lore.kernel.org/r/20200227124534.23399-1-sergiu.cuciurean@analog.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In a recent change to the SPI subsystem [1], a new `delay` struct was added
to replace the `delay_usecs`. This change replaces the current
`delay_usecs` with `delay` for this driver.

The `spi_transfer_delay_exec()` function [in the SPI framework] makes sure
that both `delay_usecs` & `delay` are used (in this order to preserve
backwards compatibility).

[1] commit bebcfd27 ("spi: introduce `delay` field for
`spi_transfer` + spi_transfer_delay_exec()")
Signed-off-by: NSergiu Cuciurean <sergiu.cuciurean@analog.com>
Link: https://lore.kernel.org/r/20200227130336.27042-1-sergiu.cuciurean@analog.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In a recent change to the SPI subsystem [1], a new `delay` struct was added
to replace the `delay_usecs`. This change replaces the current
`delay_usecs` with `delay` for this driver.

The `spi_transfer_delay_exec()` function [in the SPI framework] makes sure
that both `delay_usecs` & `delay` are used (in this order to preserve
backwards compatibility).

[1] commit bebcfd27 ("spi: introduce `delay` field for
`spi_transfer` + spi_transfer_delay_exec()")
Signed-off-by: NSergiu Cuciurean <sergiu.cuciurean@analog.com>
Link: https://lore.kernel.org/r/20200228104508.15564-1-sergiu.cuciurean@analog.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Instead of special-casing retrieval of number of X/Y electrodes based on
the firmware, let's select default values and mark registers as
non-existent on firmwares that do not support this operation.

Also mark "report rate" register as non-existent for generic firmwares
as having it set to 0 does not make sense.
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NMarco Felsch <m.felsch@pengutronix.de>
Reviewed-by: NSimon Budig <simon.budig@kernelconcepts.de>
Link: https://lore.kernel.org/r/X9FZFs3NZADoIhhH@google.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The Samsung touchkey controllers are often used with external pull-up
for the interrupt line and the I2C lines, so we might need to enable
a regulator to bring the lines into usable state. Otherwise, this might
cause spurious interrupts and reading from I2C will fail.

Implement support for a "vddio-supply" that is enabled by the
tm2-touchkey driver so that the regulator gets enabled when needed.
Signed-off-by: NStephan Gerhold <stephan@gerhold.net>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201203131242.44397-3-stephan@gerhold.netSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The Samsung touchkey controllers are often used with external pull-up
for the interrupt line and the I2C lines, so we might need to enable
a regulator to bring the lines into usable state. Otherwise, this might
cause spurious interrupts and reading from I2C will fail.

Document support for a "vddio-supply" that is enabled by the tm2-touchkey
driver so that the regulator gets enabled when needed.
Signed-off-by: NStephan Gerhold <stephan@gerhold.net>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201203131242.44397-2-stephan@gerhold.netSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Convert the device tree bindings for tm2-touchkey to the YAML format.

While we're at it, clarify the descriptions a bit to make it clear that
this driver can be used for many different MCUs that all implement
a similar I2C protocol. Depending on the MCU the voltage requirements
may be different, on some devices the controller uses 2.2V, 2.8V or
even 3.3V for vcc-supply instead of 1.8V.
Signed-off-by: NStephan Gerhold <stephan@gerhold.net>
Reviewed-by: NLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201203131242.44397-1-stephan@gerhold.netSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

devm_add_action_or_reset() is introduced as a helper function which
internally calls devm_add_action(). If devm_add_action() fails
then it will execute the action mentioned and return the error code.
This reduce source code size (avoid writing the action twice)
and reduce the likelyhood of bugs.
Signed-off-by: NFuqian Huang <huangfq.daxian@gmail.com>
Link: https://lore.kernel.org/linux-input/20190708123323.11943-1-huangfq.daxian@gmail.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This adds support for the power button attached to the Embedded Controller
on a Dell Wyse 3020 "Ariel" board.

The Embedded Controller's SPI interface is actually capable sending and
receiving the PS/2 keyboard and mouse protocol data, which looks like
a good fit for a serio driver. Howerver, I don't know of any machines where
this is actually used.

My board only has a single power button and no way to connect an actual
keyboard or a mouse. Using the atkbd driver with serio would be an overkill
and would be inconvenient for the userspace. Therefore this driver
registers an input device that is only capable of reporting the power
button presses and releases.
Signed-off-by: NLubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20201201083533.1724287-3-lkundrak@v3.skSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add binding document for the Dell Wyse 3020 a.k.a. "Ariel" Power Button.
Signed-off-by: NLubomir Rintel <lkundrak@v3.sk>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201201083533.1724287-2-lkundrak@v3.skSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

The driver has its own HID descriptor parsing code, that had and still
has several issues discovered by syzbot and other tools. Ideally we
should move the driver over to the HID subsystem, so that it uses proven
parsing code.  However the devices in question are EOL, and GTCO is not
willing to extend resources for that, so let's simply remove the driver.

Note that our HID support has greatly improved over the last 10 years,
we may also consider reverting 6f8d9e26 ("hid-core.c: Adds all GTCO
CalComp Digitizers and InterWrite School Products to blacklist") and see
if GTCO devices actually work with normal HID drivers.

Link: https://lore.kernel.org/r/X8wbBtO5KidME17K@google.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

There is a spelling mistake in the Kconfig help text. Fix it by replacing
"theses" with "these".
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201204193635.1152241-1-colin.king@canonical.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Document inhibiting input devices and its relation to being
a wakeup source.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Reviewed-by: NRandy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20200617101822.8558-1-andrzej.p@collabora.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Userspace might want to implement a policy to temporarily disregard input
from certain devices, including not treating them as wakeup sources.

An example use case is a laptop, whose keyboard can be folded under the
screen to create tablet-like experience. The user then must hold the laptop
in such a way that it is difficult to avoid pressing the keyboard keys. It
is therefore desirable to temporarily disregard input from the keyboard,
until it is folded back. This obviously is a policy which should be kept
out of the kernel, but the kernel must provide suitable means to implement
such a policy.

This patch adds a sysfs interface for exactly this purpose.

To implement the said interface it adds an "inhibited" property to struct
input_dev, and effectively creates four states a device can be in: closed
uninhibited, closed inhibited, open uninhibited, open inhibited. It also
defers calling driver's ->open() and ->close() to until they are actually
needed, e.g. it makes no sense to prepare the underlying device for
generating events (->open()) if the device is inhibited.

              uninhibit
closed      <------------ closed
uninhibited ------------> inhibited
      | ^     inhibit        | ^
 1st  | |               1st  | |
 open | |               open | |
      | |                    | |
      | | last               | | last
      | | close              | | close
      v |     uninhibit      v |
open        <------------ open
uninhibited ------------> inhibited

The top inhibit/uninhibit transition happens when users == 0.
The bottom inhibit/uninhibit transition happens when users > 0.
The left open/close transition happens when !inhibited.
The right open/close transition happens when inhibited.
Due to all transitions being serialized with dev->mutex, it is impossible
to have "diagonal" transitions between closed uninhibited and open
inhibited or between open uninhibited and closed inhibited.

No new callbacks are added to drivers, because their open() and close()
serve exactly the purpose to tell the driver to start/stop providing
events to the input core. Consequently, open() and close() - if provided
- are called in both inhibit and uninhibit paths.
Signed-off-by: NPatrik Fimml <patrikf@chromium.org>
Co-developed-by: NAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Link: https://lore.kernel.org/r/20200608112211.12125-8-andrzej.p@collabora.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Use the newly added helper in relevant input drivers.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Link: https://lore.kernel.org/r/20200608112211.12125-3-andrzej.p@collabora.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

A helper function for drivers to decide if the device is used or not.
A lockdep check is introduced as inspecting ->users should be done under
input device's mutex.
Signed-off-by: NAndrzej Pietrasiewicz <andrzej.p@collabora.com>
Link: https://lore.kernel.org/r/20200608112211.12125-2-andrzej.p@collabora.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Marking main interrupt as wakeup interrupt in probe allows us to drop
custom suspend/resume methods whose only purpose was to configure interrupt
for waking up the system.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Now that normal input devices support polling mode, and all users of
input_polled_dev API have been converted, we can remove it.
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation to enable -Wimplicit-fallthrough for Clang, fix a
warning by replacing a /* Fall through */ comment with the new
pseudo-keyword macro fallthrough.

Notice that Clang doesn't recognize /* Fall through */ comments as
implicit fall-through markings.
Signed-off-by: NGustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/d2944854e3e118b837755abf4cbdb497662001b7.1605896060.git.gustavoars@kernel.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of just letting the code
fall through to the next case.
Signed-off-by: NGustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/4b659e3e65f2fa3c8bb7ed153e2016c3fb395bbc.1605896059.git.gustavoars@kernel.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

In omap4_keypad_probe, the patch fix several bugs.

  1) pm_runtime_get_sync will increment pm usage counter even it
     failed. Forgetting to pm_runtime_put_noidle will result in
     reference leak.

  2) In err_unmap, forget to disable runtime of device,
     pm_runtime_enable will increase power disable depth. Thus a
     pairing decrement is needed on the error handling path to keep
     it balanced.

  3) In err_pm_disable, it will call pm_runtime_put_sync twice not
     one time.

To fix this we factor out code reading revision and disabling touchpad, and
drop PM reference once we are done talking to the device.

Fixes: f77621cc ("Input: omap-keypad - dynamically handle register offsets")
Fixes: 5ad567ff ("Input: omap4-keypad - wire up runtime PM handling")
Signed-off-by: NZhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201120133918.2559681-1-zhangqilong3@huawei.comSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'cmd' not described in 'VMMOUSE_CMD'
 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'in1' not described in 'VMMOUSE_CMD'
 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'out1' not described in 'VMMOUSE_CMD'
 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'out2' not described in 'VMMOUSE_CMD'
 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'out3' not described in 'VMMOUSE_CMD'
 drivers/input/mouse/vmmouse.c:99: warning: Function parameter or member 'out4' not described in 'VMMOUSE_CMD'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-16-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'keyboard' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'touchpad' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'tp_info' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'tp_info_command' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'init_mt_command' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'capsl_command' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'bl_command' not described in 'message'
 drivers/input/keyboard/applespi.c:306: warning: Function parameter or member 'data' not described in 'message'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-15-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/goodix.c:1168: warning: Function parameter or member 'ctx' not described in 'goodix_config_cb'
 drivers/input/touchscreen/goodix.c:1168: warning: Excess function parameter 'ts' description in 'goodix_config_cb'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-14-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/mouse/synaptics.c:1781: warning: Function parameter or member 'psmouse' not described in 'synaptics_setup_intertouch'
 drivers/input/mouse/synaptics.c:1781: warning: Function parameter or member 'info' not described in 'synaptics_setup_intertouch'
 drivers/input/mouse/synaptics.c:1781: warning: Function parameter or member 'leave_breadcrumbs' not described in 'synaptics_setup_intertouch'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-13-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/wm97xx-core.c:204: warning: Function parameter or member 'status' not described in 'wm97xx_set_gpio'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NRichard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20201112110204.2083435-12-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/surface3_spi.c: In function ‘surface3_spi_process_touch’:
 drivers/input/touchscreen/surface3_spi.c:97:6: warning: variable ‘timestamp’ set but not used [-Wunused-but-set-variable]
 drivers/input/touchscreen/surface3_spi.c:225: warning: Function parameter or member 'data' not described in 'surface3_spi_get_gpio_config'
 drivers/input/touchscreen/surface3_spi.c:225: warning: Excess function parameter 'ts' description in 'surface3_spi_get_gpio_config'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-11-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/misc/wm831x-on.c:30: warning: cannot understand function prototype: 'struct wm831x_on '
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NRichard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20201112110204.2083435-10-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/touchscreen/goodix.c:569: warning: Function parameter or member 'len' not described in 'goodix_check_cfg'
 drivers/input/touchscreen/goodix.c:587: warning: Function parameter or member 'len' not described in 'goodix_send_cfg'
 drivers/input/touchscreen/goodix.c:1165: warning: Function parameter or member 'cfg' not described in 'goodix_config_cb'
 drivers/input/touchscreen/goodix.c:1165: warning: Function parameter or member 'ctx' not described in 'goodix_config_cb'
 drivers/input/touchscreen/goodix.c:1165: warning: Excess function parameter 'ts' description in 'goodix_config_cb'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-5-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/misc/mc13783-pwrbutton.c:32: warning: cannot understand function prototype: 'struct mc13783_pwrb '
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-4-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the following W=1 kernel build warning(s):

 drivers/input/joystick/xpad.c:1361: warning: Function parameter or member 'xpad' not described in 'xpad_send_led_command'
 drivers/input/joystick/xpad.c:1361: warning: Function parameter or member 'command' not described in 'xpad_send_led_command'
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20201112110204.2083435-2-lee.jones@linaro.orgSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Let's use BIT() macro instead of explicitly shifting '1'.
Acked-by: NAlexandru Ardelean <Alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20201119072440.GA116840@dtor-wsSigned-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>