Commit Graph

533869 Commits

Author SHA1 Message Date
Fabio Estevam
3905de62b2 Input: imx6ul_tsc - check for negative return value
We should check for negative values returned by platform_get_irq().

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:41:53 -07:00
Fabio Estevam
6cc527b058 Input: imx6ul_tsc - propagate the errors
imx6ul_adc_init() may fail in two cases, so we should better
propagate the errors and make sure that the callers of
this function also check and propagate the errors accordingly.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:41:53 -07:00
Dmitry Torokhov
46b018fa95 Input: walkera0701 - fix abs() calculations on 64 bit values
abs() function can not be used with 64 bit values, so let's switch to
abs64(). From include/linux/kernel.h:

/*
 * abs() handles unsigned and signed longs, ints, shorts and chars.
 * For all input types abs() returns a signed long.
 * abs() should not be used for 64-bit types (s64, u64, long long)
 * - use abs64() for those.
 */

Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:39:47 -07:00
Javier Martinez Canillas
86a39bffc4 Input: mms114 - remove unneded semicolons
They aren't needed and are just creating null statements so remove it.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:39:03 -07:00
Javier Martinez Canillas
b9ab471b71 Input: pm8941-pwrkey - remove unneded semicolon
It's not needed and is just creating a null statement so remove it.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:39:03 -07:00
Daniel Martin
b1452723cf Input: fix typo in MT documentation
Section "Event Computation" had this:
    ...
    ABS_MT_TOOL_X := C_X
    ABS_MT_TOOL_X := C_Y

Replace the second ABS_MT_TOOL_X with ABS_MT_TOOL_Y.

Signed-off-by: Daniel Martin <consume.noise@gmail.com>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:39:02 -07:00
Dudley Du
b0379d7aa4 Input: cyapa - fix address of Gen3 devices in device tree documentation
All of the Gen3 touchpads are fixed with I2C address 0x67, so correct the
reg value description from 0x24 to 0x67.

Signed-off-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-19 11:39:02 -07:00
Dmitry Torokhov
53431d0a35 Merge branch 'next' into for-linus
Prepare second round of input updates for 4.3 merge window.
2015-09-11 09:02:36 -07:00
Fabio Estevam
ade9c1a47c Input: imx_keypad - remove obsolete comment
Since commit 81e8f2bc (Input: imx_keypad - add pm suspend and resume
support) the imx_keypad driver supports power management, so let's remove
the obsolete comment.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-05 11:49:33 -07:00
Haibo Chen
9a436d524d Input: touchscreen - add imx6ul_tsc driver support
Freescale i.MX6UL contains a internal touchscreen controller,
this patch add a driver to support this controller.

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-05 11:49:33 -07:00
Sanchayan Maity
48ead50c1d Input: Add touchscreen support for Colibri VF50
The Colibri Vybrid VF50 module supports 4-wire touchscreens using
FETs and ADC inputs. This driver uses the IIO consumer interface
and relies on the vf610_adc driver based on the IIO framework.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-05 11:11:48 -07:00
Takashi Iwai
f5d75341fa Input: i8042 - lower log level for "no controller" message
Nowadays the machines without i8042 controller is popular, and no need
to print "No controller found" message in the error log level, which
annoys at booting in quiet mode.  Let's lower it info level.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-05 11:11:48 -07:00
Takashi Iwai
eb38f3a4f6 Input: evdev - do not report errors form flush()
We've got bug reports showing the old systemd-logind (at least
system-210) aborting unexpectedly, and this turned out to be because
of an invalid error code from close() call to evdev devices.  close()
is supposed to return only either EINTR or EBADFD, while the device
returned ENODEV.  logind was overreacting to it and decided to kill
itself when an unexpected error code was received.  What a tragedy.

The bad error code comes from flush fops, and actually evdev_flush()
returns ENODEV when device is disconnected or client's access to it is
revoked. But in these cases the fact that flush did not actually happen is
not an error, but rather normal behavior. For non-disconnected devices
result of flush is also not that interesting as there is no potential of
data loss and even if it fails application has no way of handling the
error. Because of that we are better off always returning success from
evdev_flush().

Also returning EINTR from flush()/close() is discouraged (as it is not
clear how application should handle this error), so let's stop taking
evdev->mutex interruptibly.

Bugzilla: http://bugzilla.suse.com/show_bug.cgi?id=939834
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 23:38:23 -07:00
James Chen
22c15e5e00 Input: elants_i2c - extend the calibration timeout to 12 seconds
The 23 inch device found in Chrome project buddy requires 9.2~10.5 seconds
to complete calibration. Let's increase calibration timeout to 12 seconds
to give the device enough time.

Signed-off-by: James Chen <james.chen@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 23:37:10 -07:00
Luis de Bethencourt
26492f195e Input: sparcspkr - fix module autoload for OF platform drivers
These platform drivers have a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 23:37:09 -07:00
Luis de Bethencourt
731857715f Input: regulator-haptic - fix module autoload for OF platform driver
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:56:20 -07:00
Luis de Bethencourt
544edf56fd Input: pwm-beeper - fix module autoload for OF platform driver
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:56:20 -07:00
Luis de Bethencourt
e4dbe79628 Input: ab8500-ponkey - Fix module autoload for OF platform driver
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.

Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:56:19 -07:00
Javier Martinez Canillas
f2bc114b82 Input: cyttsp - remove unnecessary MODULE_ALIAS()
The drivers have a I2C device ID table that is used to create the module
aliases and also "cyttsp" and "cyttsp4" are not supported I2C device IDs
so these module aliases are never used.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:56:19 -07:00
João Paulo Rechi Vita
4aeca98c49 Input: elan_i2c - add ACPI ID "ELAN1000"
This ACPI ID present in the DSDT of the ASUS E202SA laptop.

Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:56:18 -07:00
Dmitry Torokhov
01b944fe1c Merge branch 'next' into for-linus
Prepare first round of input updates for 4.3 merge window.
2015-09-03 10:01:44 -07:00
Duson Lin
58f1eae48e Input: elan_i2c - use iap_version to get firmware information
When driver is in IAP mode ic_type query may return 0xff. However
iap_version will always be valid, so let's use it to determine parameters
of the firmware that the controller is supposed to accept.

Signed-off-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-09-03 10:00:16 -07:00
Javier Martinez Canillas
d6f5aef298 Input: max8997_haptic - fix module alias
The driver is a platform driver and not a I2C driver so its modalias
should be exported with MODULE_DEVICE_TABLE(platform,...) instead of
MODULE_DEVICE_TABLE(i2c,...).

Also, remove the unnecessary MODULE_ALIAS("platform:max8997-haptic")
now that the correct module alias is created.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-28 17:46:25 -07:00
Benson Leung
742f452b9b Input: elan_i2c - fix typos for validpage_count
Search for "vaildpage_count" and replace with "validpage_count".

Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-28 17:46:24 -07:00
Stefan Assmann
66bc2f51ef Input: psmouse - add small delay for IBM trackpoint pass-through mode
There are trackpoint devices that fail to respond to the PS2 command
PSMOUSE_CMD_GETID if immediately queried after the parent device is
deactivated. Add a small delay for the hardware to get in a sane state
before sending any PS2 commands.

One example of such a system is:
Lenovo ThinkPad X120e, model 30515QG
synaptics: Touchpad model: 1, fw: 8.0, id: 0x1e2b1, caps: 0xd001a3/0x940300/0x121c00, board id: 1811, fw id: 797391

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-26 13:14:25 -07:00
Dmitry Torokhov
e51e38494a Input: synaptics - fix handling of disabling gesture mode
Bit 2 of the mode byte has dual meaning: it can disable reporting of
gestures when touchpad works in Relative mode or normal Absolute mode,
or it can enable so called Extended W-Mode when touchpad uses enhanced
Absolute mode (W-mode). The extended W-Mode confuses our driver and
causes missing button presses on some Thinkpads (x250, T450s), so let's
make sure we do not enable it.

Also, according to the spec W mode "... bit is defined only in Absolute
mode on pads whose capExtended capability bit is set. In Relative mode and
in TouchPads without this capability, the bit is reserved and should be
left at 0.", so let's make sure we respect this requirement as well.

Reported-by: Nick Bowler <nbowler@draconx.ca>
Suggested-by: Gabor Balla <gaborwho@gmail.com>
Tested-by: Gabor Balla <gaborwho@gmail.com>
Tested-by: Nick Bowler <nbowler@draconx.ca>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-26 10:09:22 -07:00
Michele Curti
534fcb3bda Input: elan_i2c - enable ELAN0100 acpi panels
Enable ELAN0100 touchpad driver, found on a Asus X205TA laptop, to
gai 2,3 fingers tap and 2 fingers scroll.

Signed-off-by: Michele Curti <michele.curti@gmail.com>
Reviewed-by: Duson Lin <dusonlin@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-24 10:55:49 -07:00
Peng Fan
4ea14a53d8 Input: gpio-keys - report error when disabling unsupported key
When trying to disable a key that is not supported by the device we should
report error, not do nothing and report success:

root@yocto:/sys/devices/soc0/gpio-keys# cat keys
114-116
root@yocto:/sys/devices/soc0/gpio-keys# echo 77 > keys
root@yocto:/sys/devices/soc0/gpio-keys#

We want 'echo 77 > keys' to report an error, but silence to give us an
illusion that all is 'ok'.

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-24 10:55:48 -07:00
Julia Lawall
ff89de6ba1 Input: sur40 - fix error return code
Propagate error code on failure, or upper layers will be confused by
returned 0 (success) code.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-24 10:55:24 -07:00
Dan Carpenter
9c8f55798a Input: sentelic - silence some underflow warnings
I have a static checker that complains when we check for an upper bound
but don't have a corresponding check for a lower bound.  With this code,
the upper bound check seems not really required, so it is not a bug to
leave the lower bound check out as well.  But let's silence the warning
by making these variables unsigned.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-21 09:32:59 -07:00
Yalin Wang
012bd2a533 Input: zhenhua - switch to using bitrev8()
Instead of custom zhenhua_bitreverse() let's use generic bitrev8().

Signed-off-by: Yalin Wang <yalin.wang2010@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-20 17:44:34 -07:00
Vincent Pelletier
1ae5ddb6f8 Input: gpio_keys_polled - request GPIO pin as input.
GPIOF_IN flag was lost in:
Commit 633a21d80b4a("input: gpio_keys_polled: Add support for GPIO
descriptors").

Without this flag, legacy code path (for non-descriptor GPIO declarations)
would configure GPIO as output (0 meaning GPIOF_DIR_OUT | GPIOF_INIT_LOW).

Cc: stable@vger.kernel.org
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-20 12:07:37 -07:00
Javier Martinez Canillas
95ecdc2549 Input: cros_ec_keyb - replace KEYBOARD_CROS_EC dependency
The ChromeOS EC keyboard driver config depends on CROS_EC_PROTO but
MFD_CROS_EC selects CROS_EC_PROTO instead. Mixing select and depends
on is bad practice as it may lead to circular Kconfig dependencies.

Since the platform device that is matched with the keyboard driver
is registered by the ChromeOS EC mfd driver, KEYBOARD_CROS_EC really
should depend on MFD_CROS_EC. And because this config option selects
CROS_EC_PROTO, that dependency is met as well. So make the driver
to depend on MFD_CROS_EC instead of CROS_EC_PROTO.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-19 14:24:36 -07:00
Matt Ranostay
efe3b616f8 Input: cap11xx - add LED support
Several cap11xx variants have LEDs that be can be controlled; let's plug
the driver into the LED subsystem.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-16 23:22:01 -07:00
Stephen Rothwell
7229b87bb2 Input: elants_i2c - fix for devm_gpiod_get API change
Flags are now mandatory for devm_gpiod_get(). So let's use proper flag
to configure gpio for output instead of doing this by hand.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
[Dmitry: GPIOD_ASIS -> GPIOD_OUT_LOW]
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-13 16:05:02 -07:00
Dmitry Torokhov
71d0f56235 Input: elan_i2c - enable asynchronous probing
It takes a bit of time to go through controller power up sequence and
initialization. To not stall the overall boot progress let's probe the
controller asynchronously, given that userspace is usually prepared for
hot-plugging of input devices and thus does not rely on particular
ordering.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-07 14:55:39 -07:00
Dmitry Torokhov
9f6a07b67f Input: elants_i2c - enable asynchronous probing
It takes a bit of time to go through controller power up sequence and
initialization. To not stall the overall boot progress let's probe the
controller asynchronously, given that userspace is usually prepared for
hot-plugging of input devices and thus does not rely on particular
ordering.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-07 14:55:39 -07:00
Dmitry Torokhov
afe10358e4 Input: elants_i2c - wire up regulator support
Elan touchscreen controllers use two power supplies, vcc33 and vccio,
and we need to enable them before trying to access the device. On X86
firmware usually does this, but on ARM it is usually left to the kernel.

Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Scott Liu <scott.liu@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-07 14:55:38 -07:00
Dmitry Torokhov
00159f19a5 Input: do not emit unneeded EV_SYN when suspending
Do not emit EV_SYN/SYN_REPORT on suspend if there were no keys that are
still pressed as we are suspending the device (and in all other cases when
input core is forcibly releasing keys via input_dev_release_keys() call).

Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-07 14:55:38 -07:00
Duson Lin
6b30c73e9f Input: elantech - add special check for fw_version 0x470f01 touchpad
It is no need to check the packet[0] for sanity check when doing
elantech_packet_check_v4() function for fw_version = 0x470f01 touchpad.

Signed-off by: Duson Lin <dusonlin@emc.com.tw>
Reviewed-by: Ulrik De Bie <ulrik.debie-os@e2big.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-07 14:54:15 -07:00
Marek Belisko
e661d0a044 Input: twl4030-vibra - fix ERROR: Bad of_node_put() warning
Fix following:
[    8.862274] ERROR: Bad of_node_put() on /ocp/i2c@48070000/twl@48/audio
[    8.869293] CPU: 0 PID: 1003 Comm: modprobe Not tainted 4.2.0-rc2-letux+ #1175
[    8.876922] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[    8.883514] [<c00159e0>] (unwind_backtrace) from [<c0012488>] (show_stack+0x10/0x14)
[    8.891693] [<c0012488>] (show_stack) from [<c05cb810>] (dump_stack+0x78/0x94)
[    8.899322] [<c05cb810>] (dump_stack) from [<c02cfd5c>] (kobject_release+0x68/0x7c)
[    8.907409] [<c02cfd5c>] (kobject_release) from [<bf0040c4>] (twl4030_vibra_probe+0x74/0x188 [twl4030_vibra])
[    8.917877] [<bf0040c4>] (twl4030_vibra_probe [twl4030_vibra]) from [<c03816ac>] (platform_drv_probe+0x48/0x90)
[    8.928497] [<c03816ac>] (platform_drv_probe) from [<c037feb4>] (really_probe+0xd4/0x238)
[    8.937103] [<c037feb4>] (really_probe) from [<c0380160>] (driver_probe_device+0x30/0x48)
[    8.945678] [<c0380160>] (driver_probe_device) from [<c03801e0>] (__driver_attach+0x68/0x8c)
[    8.954589] [<c03801e0>] (__driver_attach) from [<c037ea60>] (bus_for_each_dev+0x50/0x84)
[    8.963226] [<c037ea60>] (bus_for_each_dev) from [<c037f828>] (bus_add_driver+0xcc/0x1e4)
[    8.971832] [<c037f828>] (bus_add_driver) from [<c0380b60>] (driver_register+0x9c/0xe0)
[    8.980255] [<c0380b60>] (driver_register) from [<c00097e0>] (do_one_initcall+0x100/0x1b8)
[    8.988983] [<c00097e0>] (do_one_initcall) from [<c00b8008>] (do_init_module+0x58/0x1c0)
[    8.997497] [<c00b8008>] (do_init_module) from [<c00b8cac>] (SyS_init_module+0x54/0x64)
[    9.005950] [<c00b8cac>] (SyS_init_module) from [<c000ed20>] (ret_fast_syscall+0x0/0x54)
[    9.015838] input: twl4030:vibrator as /devices/platform/68000000.ocp/48070000.i2c/i2c-0/0-0048/48070000.i2c:twl@48:audio/input/input2

node passed to of_find_node_by_name is put inside that function and new node
is returned if found. Free returned node not already freed node.

Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-05 11:11:37 -07:00
James Chen
6fd3850227 Input: elants_i2c - disable idle mode before updating firmware
If the device is in idle mode and is in the middle of a scan it may not
have a chance to react to the reset and then IAP commands within required
time interval and firmware update may fail. Let's bring the device out of
idle mode before attempting to reset it so that the scan period is smaller
and thus it can react to the command quicker.

Signed-off-by: James Chen <james.chen@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-05 11:09:56 -07:00
Nick Dyer
a14c0f8fef MAINTAINERS: Add maintainer for atmel_mxt_ts
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:55 -07:00
Nick Dyer
507584e202 Input: atmel_mxt_ts - remove warning on zero T44 count
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:55 -07:00
Nick Dyer
eafc0c8783 Input: atmel_mxt_ts - initialise input slots with INPUT_MT_DIRECT
This indicates the device coordinates should be directly mapped to screen.
This is valid since scaling/flipping/rotation should be done by configuring
the MXT device.

It also flags to Android using INPUT_PROP_DIRECT that the device should be
treated as a touch screen by default, and removes the necessity for a
default IDC file.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:54 -07:00
Nick Dyer
885f3fb9fa Input: atmel_mxt_ts - disable interrupt for 50ms after reset
The CHG/interrupt line is momentarily set (approximately 100 ms) as an
input after power-up or reset for diagnostic purposes. This may cause
spurious interrupts, so disable interrupt handler during this period.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:54 -07:00
Nick Dyer
204476642d Input: atmel_mxt_ts - improve device tree parsing
Use function rather than loop, define np to reduce wrapping.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:53 -07:00
Pan Xinhui
50fabb02c7 Input: atmel_mxt_ts - suspend/resume causes panic if input_dev fails to init
input_dev may be NULL if mxt_initialize_input_device fails. But pm ops is
still available and suspend/resume assume
input_dev is not NULL. To fix this issue, we add a check if (!input_dev).

Signed-off-by: Pan Xinhui <xinhuix.pan@intel.com>
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:53 -07:00
Nick Dyer
146c6a662f Input: atmel_mxt_ts - remove unused defines
Many of these values are out of date and they aren't used in the driver
- all they do is increase the size of the kernel source.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:52 -07:00
Nick Dyer
7f3884f7de Input: atmel_mxt_ts - use deep sleep mode when stopped
The hardcoded 0x83 CTRL setting overrides other settings in that byte,
enabling extra reporting that may not be useful on a particular platform.

Implement improved suspend mechanism via deep sleep. By writing zero to
both the active and idle cycle times the maXTouch device can be put into a
deep sleep mode, using minimal power. It is necessary to issue a calibrate
command after the chip has spent any time in deep sleep, however a soft
reset is unnecessary.

Use the old method on Chromebook Pixel via platform data option.

This patch also deals with the situation where the power configuration is
zero on probe, which would mean that the device never wakes up to execute
commands.

After a config download, the T7 power configuration may have changed so it
is necessary to re-read it.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Acked-by: Benson Leung <bleung@chromium.org>
Acked-by: Yufeng Shen <miletus@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-04 17:03:52 -07:00