This flag is a NOOP and can be removed now.
Signed-off-by: NYong Zhang <yong.zhang0@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This will ensure that the device delivers input events only when there
are users.
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Instead of using hard IRQ and workqueue solution switch to using threaded
interrupt handler to simplify the code and locking rules.
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Since touchscreen driver does not handle any events to be sent to the
device we can close serio port first and then unregister the input device.
Tested-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Implement open() and close() methods for the input device so that we
do not start the device unless there are users listening to the events.
Acked-by: NChris Bagwell <chris@cnpbagwell.com>
Tested-by: NPing Cheng <pingc@wacom.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

tnetv107x-ts.c uses interfaces from linux/module.h,
so it should include that file.  This patch fixes build errors.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The original license statement was confusing since it was unclear if
the license was pure GPLv2 or GPLv2+ and did not match the license
of the driver max11801_ts was derived from. The license is GPLv2+.
Signed-off-by: NJiejing Zhang <jiejing.zhang@freescale.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Atmel mxt1386 touch controller has the touch pressure information so
let's report it to the user space.

[dtor@mail.ru: added ABS_RESSURE reporting for ST emulation.]
Signed-off-by: NYufeng Shen <miletus@chromium.org>
Acked-by: NWanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Input close or device disable should not interact with the exported
gpiolib functionality. However that's the case. __ad7879_disable()
clears the entire AD7879_REG_CTRL2, while it should just power down
the ADC and its reference.
Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The implementation does break from the for loop after we assign 'i' to
variable 'found'.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The implementation in cy8ctmg110_probe() does not properly set reset_pin
and irq_pin from platform data. Let's fix it.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

i2c_master_send returns negative errno, or else the number of bytes written.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Currently, battery drivers also use poll_sample() provided by the
wm97xx-core but this code always checks if the pen is down. Mark the
channels which really need this (i.e. for the touchscreen) with the
PEN_DOWN bit, and skip the checks otherwise. Now, the battery channels
can always be read.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The current implementation of poll_sample() has the problem that one of
its arguments, the channel to be selected, differs from wm9713 to other
variants. This parameter gets passed to the (currently unused)
mach-specific functions pre_sample() and post_sample() which thus have
to deal with codec-specific differences. Refactor the routine so that
the argument to poll_sample() is generic for all codecs and do necessary
conversions only in the codec-specific driver. The outcome even uses
less code and removes the non-standard use of the PEN_DOWN bit to mark
the AUX-channels.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Handle the objects with multiple instances correctly when the configuration
data is loaded.
Signed-off-by: NIiro Valkonen <iiro.valkonen@atmel.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Update the object list to include new objects, and add unique identifiers
so we can distinguish between old & new generation of the same object.
Signed-off-by: NIiro Valkonen <iiro.valkonen@atmel.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch updates the email address of the gpio_mouse, at32psif, and
atmel-wm97xx drivers supported by me to an email account I will use on a more
regular basis in the future.
Signed-off-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Use gpio_request_one() instead of multiple gpiolib calls.
This also simplifies error handling a bit.
Signed-off-by: NIgor Grinberg <grinberg@compulab.co.il>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Remove the space between "platform:" prefix and the driver name.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

These new platform-specific values can be used to set the fuzz parameter
passed to the input_set_abs_params() function for the ABS_X, ABS_Y and
ABS_PRESSURE axes.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This new parameter allows the polling frequency to be configured while
keeping the default of once every millisecond.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Depending on the quality of the touch panel, the time for the X-, X+, Y-
and Y+ inputs to settle may vary. The poll_delay parameter can be used
to override the default of 1 millisecond.

Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Kwangwoo Lee <kwangwoo.lee@gmail.com>
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Finger touch events or very quick stylus events on low-quality panels
can cause the tsc2007 to read bogus values. Looking at oscilloscope
snapshots, this seems to be caused by the touch event disappearing
during the measurements. These bogus values result in misclicks, where
the X and Y values deviate from the real position.

Most of these misclicks can be filtered out by setting a low enough
threshold for the maximum resistance (which is loosely the inverse of
the pressure) allowed to consider a set of values valid. Since this
behaviour is largely dependent on the type and quality of the panel,
this commit introduces the max_rt parameter. The default value is kept
at MAX_12BIT.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

When the controller signals a pen-down event via the platform-specific
GPIO, while the sample values indicate an invalid measurement, the
measurement needs to be repeated.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This error handling code can be reached before ts_dev->input is
initialized, so it is safer to always use the original name,
input_dev.
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The pendown gpio was requested but not configured for input.
Configure it for input.
Signed-off-by: NIgor Grinberg <grinberg@compulab.co.il>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Just set vref_mv in your platform config to use external vref. Otherwise
the internal one is used.
Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

req.sample needs its own cacheline otherwise accessing req.msg fetches
it in again.

Note: This effect doesn't occur if the underlying SPI driver doesn't use
DMA at all.
Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Acked-by: NJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Make sure we are passing the same cookie in all calls to request_irq() and
free_irq().
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Don't report BTN_TOUCH until we've got data as some less robust applications
can be confused by getting a touch event by itself and it doesn't seem
unreasonable for them to expect coordinates along with a touch.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This allows maximum flexibility for configuring the direct GPIO based
interrupts.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

If the WM831x pen down and data IRQs run in parallel it is possible for the
data and pen down IRQs to deadlock themselves as one is part way through
disabling its operation while the other is part way through enabling. Fix
this by always disabling the pen down interrupt while data is active and
vice versa.  When a changeover is required we disable the IRQ that is to
be stopped then schedule work that will enable the new IRQ.

We need to handle the data flow in the data IRQ as the readback from the
device needs to be ordered correctly with the IRQ for robust operation.

This also fixes an issue when using the built in IRQs due to enable_irq()
not being valid from interrupt context on an interrupt controller with bus
operations like the built in IRQ controller - this issue may also have
affected other interrupt controllers.  We can't rely on having the data
and pen down IRQs available via GPIOs on the CPU on every system.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Atmel touchscreen chips can use MT protocol B because they can assign
unique id to ABS_MT_TRACKING_ID from finger id provided by hardware.
Signed-off-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: NHenrik Rydberg <rydberg@euromail.se>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Make the CHG line (interrupt line) go high after the interrupts have been
enabled to make sure we don't miss the falling edge.
Signed-off-by: NIiro Valkonen <iiro.valkonen@atmel.com>
Acked-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Atmel touchscreen chip can support 12bit resolution and this patch
modifies to get maximum x and y size from platform data.
Signed-off-by: NJoonyoung Shim <jy0922.shim@samsung.com>
Acked-by: NIiro Valkonen <iiro.valkonen@atmel.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Add MAXI max11801 resistive touchscreen controller driver. This driver
uses Auto Mode and Aperture Mode.

Support for other max1180x devices can be added to this driver as well,
as they use almost the same register addresses and codes.

You can find data sheet here:
http://www.maxim-ic.com/datasheet/index.mvp/id/5943Signed-off-by: NZhang Jiejing <jiejing.zhang@freescale.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

In case of an error in h3600ts_connect(), deconstruct in correct order
and with the right calls.
Signed-off-by: NChristoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>