Introduce freezer-friendly wrappers around wait_event_interruptible() and
wait_event_interruptible_timeout(), originally defined in <linux/wait.h>, to
be used in freezable kernel threads.  Make some of the freezable kernel
threads use them.

This is necessary for the freezer to stop sending signals to kernel threads,
which is implemented in the next patch.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NPavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NIlya Frolov <zeylie@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Convert from class_device to device for hwmon_device_register/unregister
Signed-off-by: NTony Jones <tonyj@suse.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Signed-off-by: NMark M. Hoffman <mhoffman@lightlink.com>

Signed-off-by: NKristoffer Ericson <Kristoffer.Ericson@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Given that the code is not checking for signals it should
use uninterruptible sleep.
Signed-off-by: NRene Herman <rene.herman@gmail.com>
Acked-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

A reply of 0x0600 means all OK, 0x1501 means OK, but EEPROM empty.
The behavior with an empty EEPROM is the same as without one at all
so do not fail loading the driver.
Signed-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch fixes a nasty typo in usbtouchscreen driver. The typo
is inherited from the original mtouchusb. It used to make the input
subsytem to incorrectly report the physical device ids to userspace
that in turn is very confusing for, e.g. XInput hotplug facilities
in setups with multiple identical touchscreens.
Signed-off-by: NVladimir Shebordaev <vshebordaev@mail.ru>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

This patch adds support for IdealTEK URTC1000 touchscreen controllers.

Documentation can be downloaded at:

	http://projects.tbmn.org/cgi-bin/trac.cgi/wiki/urtc-1000Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

These serial touchscreens are found on some Fujitsu lifebook
P-series laptops, and the B6210. Using this requires a new
version of inputattach and doing:

 inputattach -fjt /dev/ttyS0

Big thanks to Stephen Hemminger for testing it and making it
work on his B6210 laptop.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Pendown status from the PENIRQ pin is currently read only at the beginning
of a sample set. If the pen is lifted just after sampling has began then
sampled values become wrong.

This patch adds an optional platform penirq_recheck_delay attribute.  If
non-zero, samples are only reported to the input subsystem if PENIRQ is
still active that long after the samples taken.
Signed-off-by: NSemih Hazar <semih.hazar@indefia.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The ads7846 driver has support for filtering, but when the chip gets
deselected between samples this causes noise. This patch adds support
for an optional settling delay time, so that two consecutive samples
will be taken with the specified delay time apart.  This ensures that
the chip won't be deselected, so the noise won't appear.

Filtering can still be done, but will have less work to do since each
time a new sample is taken the same delay applies.
Signed-off-by: NSemih Hazar <semih.hazar@indefia.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Acked-by: NNigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch adds support for IRTOUCHSYSTEMS (or UNITOP) infrared touchscreens.

The touchscreen sends data in 8-byte packets.
BYTE 0 - unknown meaning, seen only one value: 0x54
BYTE 1 - unknown meaning, 3 lowest bits indicate touch state
        values seen: 0x81, 0x82 or 0x83
        bit 0 = set if the screen is touched and was not touched before (touch
        bit 1 = set if the screen is touched and was touched (dragging)
        bit 2 = set if the touch was ended (release)
BYTES 2 and 3 - X position, high-order-byte first, range = 0 to 0x0FFF
BYTES 4 and 5 - Y position, high-order-byte first, range = 0 to 0x0FFF
BYTE 6 - unknown meaning, seen only one value: 0xFF
BYTE 7 - unknown meaning, seen only one value: 0x00
Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

During the move from drivers/usb/input into drivers/input/touchscreen
Kconfig variables were shuffled a bit to use a new namespace
(CONFIG_TOUCHSCREEN) while usbtouchscreen was still using old ones.

Also noticed by Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

In commit [1] the SPI mode is set to 1, but it should be 0.  As stated
in the commit, ads784x samples the data on the rising edge.  SPI mode 1
samples on the falling edge [2] though.

The root cause of this is a bug in the omap_uwire code, which treats
CPHA=1 incorrectly; so these two bugs cancel each other out on one
of the main regression test platforms for this driver.

[1] kernel.org GIT 7937e86a
[2] http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_BusSigned-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The TSC2046 is an updated version of the ADS7846 ... mention that in
the Kconfig helptext and driver source.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NKevin Hilman <khilman@mvista.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Fix Philips UCB1400 driver to use sched_setscheduler() instead of setting
the fields of task_struct directly.
Signed-off-by: NSatoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

stuff that does select USB should depend on USB_ARCH_HAS_HCD, or we'll
end up with unbuildable configs.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Trivial fix to follow the DECLARE_WORK changes, this makes the HD64461
touchscreen driver work properly again. As pointed out by David Howells.
Signed-off-by: NKristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This will allow concentrating all input devices in one place
in {menu|x|q}config.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>

Trivial compilation fixes for the hp6xx drivers.
Signed-off-by: NKristoffer Ericson <Kristoffer_e1@hotmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch adds module parameters for several timing values used
in the driver. These values can vary based on the hardware design
and how much capacitive filtering there is on the touch panel inputs,
and the resistance of the panel.
Signed-off-by: NCliff Brake <cbrake@bec-systems.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

In preparation for struct class_device -> struct device input
core conversion, switch to using input_dev->dev.parent when
specifying device position in sysfs tree.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Use input_get_drvdata() and input_set_drvdata() instead.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

The UCB1400 is missing a name parameter in the device_driver struct.
This causes missing information in the /sys tree and seems to cause
other problems with the AC97 functionality. This was tested on a PXA270
system.
Signed-off-by: NCliff Brake <cbrake@bec-systems.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The ads7843 support has now become almost trivial since the last
rework.
Signed-off-by: NNicolas Ferre <nicolas.ferre@rfo.atmel.com>
Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

- hrtimers did not use the hrtimer_restart enum and relied on the implict
  int representation. Fix the prototypes and the functions using the enums.
- Use seperate name spaces for the enumerations
- Convert hrtimer_restart macro to inline function
- Add comments

No functional changes.

[akpm@osdl.org: fix input driver]
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

From: Andrew Morton <akpm@osdl.org>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

 - Hook up to hwmon
     * show sensor attributes only if hwmon is present
     * ... and the board's reference voltage is known
     * otherwise be just a touchscreen
 - Report voltages per hwmon convention
     * measure in millivolts
     * voltages are named in[0-8]_input (ugh)
     * for 7846 chips, properly range-adjust vBATT/in1_input

Battery measurements help during recharge monitoring.  On OSK/Mistral,
the measured voltage agreed with a multimeter to several decimal places.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

We can't depend on the pressure value to determine when the pen was
lifted, so use the GPIO line state instead. This also helps with
chips (like ads7843) that don't have pressure sensors.
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Talk to ADS7846 chip using SPI mode 1, which is what the chip
supports: writes on falling clock edge, reads on rising.
Signed-off-by: NImre Deak <imre.deak@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Use hrtimer instead of the normal timer, since it provides better
sampling resolution. This will:

 - avoid a problem where we have a 1 jiffy poll period and
   dynamic tick on
 - utilize high resolution HW clocks when they are added to
   the hrtimer framework
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

On some LCDs leaving the Vref on provides much better readings.
Signed-off-by: NJarkko Oikarinen <jarkko.oikarinen@nokia.com>
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Some LCDs like the LS041Y3 require a customized filtering
logic for reliable readings, so make the filtering function
replacable through platform specific hooks.
Signed-off-by: NImre Deak <imre.deak@solidboot.com>
Signed-off-by: NJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Commit 2d4ba4a3 introduced a dependency
that was never meant to exist when the ac97_bus.c module was created.
Move ac97_bus.c up the directory hierarchy to make sure it is built when
selected even if sound is configured out so things work as originally
intended.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This driver is an AC97 codec according to its help text.  However, if SOUND is
disabled, the "select SND_AC97_BUS" still inserts that into the .config file:

#
# Sound
#
# CONFIG_SOUND is not set
CONFIG_SND_AC97_BUS=m

Even if the config software followed dependency chains on selects, we should
try to limit usage of "select" to library-type code that is needed (e.g., CRC
functions) instead of bus-type support.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

try_to_freeze() was moved into include/linux/freezer.h
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

SLAB_KERNEL is an alias of GFP_KERNEL.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>

Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>