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path: root/drivers/input/touchscreen/zforce_ts.c
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2024-10-02move asm/unaligned.h to linux/unaligned.hAl Viro
asm/unaligned.h is always an include of asm-generic/unaligned.h; might as well move that thing to linux/unaligned.h and include that - there's nothing arch-specific in that header. auto-generated by the following: for i in `git grep -l -w asm/unaligned.h`; do sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i done for i in `git grep -l -w asm-generic/unaligned.h`; do sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i done git mv include/asm-generic/unaligned.h include/linux/unaligned.h git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h
2024-09-05Input: zforce_ts - switch to using asynchronous probingDmitry Torokhov
The driver waits for the device to boot, which can be a lengthy process. Switch it to asynchronous probing to allow more devices to be probed simultaneously. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-19-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - remove assert/deassert wrappersDmitry Torokhov
The wrappers are extremely simple, used once, and do not bring much value. Remove them. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-18-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - do not hardcode interrupt levelDmitry Torokhov
Stop forcing interrupt to be low level triggered and instead rely on the platform to define proper trigger to allow flexibility in board designs. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-17-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - switch to using devm_regulator_get_enable()Dmitry Torokhov
The driver does not actively manage regulator state past probe() time, so we can use devm_regulator_get_enable() to simplify the code. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-16-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - stop treating VDD regulator as optionalDmitry Torokhov
This regulator is not optional from the controller point of view, so stop treating it as such. For hard-wired designs that omit the regulator from their device trees regulator subsystem will create a dummy instance. This may introduce unnecessary delay of 100us in case of dummy regulator, but if it is important the driver should be marked as using asynchronous probing to avoid even longer delays waiting for the command completions. Also use usleep_range() instead of udelay() to avoid spinning. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-15-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - make zforce_idtable constantDmitry Torokhov
The I2C ID table is not supposed to change; mark it as const. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-14-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - use dev_err_probe() where appropriateDmitry Torokhov
Use dev_err_probe() helper to log deferrals in the devices_deferred debugfs file and avoid extra messages in the logs. Also rename "ret" variables holding error codes only to "error". Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-13-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - do not ignore errors when acquiring regulatorDmitry Torokhov
We should abort probe on any error besides -ENOENT which signifies that the regulator is not defined in device tree or elsewhere, not only when we see -EPROBE_DEFER. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-12-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - make parsing of contacts less confusingDmitry Torokhov
Zforce touch data packet consists of a byte representing number of contacts followed by several chunks with length of 9 bytes representing each contact. Instead of accounting for the leading byte by increasing offset of each field in contacts by one introduce a pointer to contact data and point it appropriately. This avoids awkward constructs like: point.prblty = payload[9 * i + 9]; which makes it seem like there is off-by-one error, in favor of more straightforward: point.prblty = p[8]; Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-11-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - switch to using get_unaligned_le16Dmitry Torokhov
Instead of doing conversion from little-endian data to CPU endianness by hand use existing helpers. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-10-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - use guard notation when acquiring mutexesDmitry Torokhov
Guard notation allows for simpler code and ensures that mutexes are automatically released in all code paths. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-9-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - ensure that pm_stay_awake() and pm_relax() are balancedDmitry Torokhov
There is a small chance that ts->suspending flag may change while the interrupt handler is running. To make sure call to pm_relax() is not skipped on accident use a temporary to hold the original value at the beginning of interrupt. Use READ_ONCE() so that the value is actually fetched at the right time. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-8-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - remove unneeded lockingDmitry Torokhov
There is no need to have a lock around calls to i2c_master_send() and i2c_master_recv() as they are not issued concurrently and they are not sharing any buffers. Also there is no need for command_mutex as all commands are issued sequentially. Remove both. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-7-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - handle errors from input_mt_init_sots()Dmitry Torokhov
input_mt_init_slots() can potentially return error which needs to be handled. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-6-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - do not explicitly set EV_SYN, etc bitsDmitry Torokhov
Input core and various helpers already do that for us, so drop the code setting these bits explicitly. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-5-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - remove support for platfrom dataDmitry Torokhov
There are no in-tree users of platform data and any new ones should either use device tree or static device properties, so let's remove platform data support. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-4-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - simplify reporting of slot stateDmitry Torokhov
input_mt_report_slot_state() returns true if slot is active, so we can combine checks for point.state != STATE_UP. Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-3-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-09-05Input: zforce_ts - use devm_add_action_or_reset()Sudip Mukherjee
If devm_add_action() fails we are explicitly calling the cleanup to free the resources allocated. Lets use the helper devm_add_action_or_reset() and return directly in case of error, as we know that the cleanup function has been already called by the helper if there was any error. Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Andreas Kemnade <andreas@kemnade.info> # Tolino Shine2HD Link: https://lore.kernel.org/r/20240824055047.1706392-2-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2024-05-13Input: drop explicit initialization of struct i2c_device_id::driver_data to 0Uwe Kleine-König
These drivers don't use the driver_data member of struct i2c_device_id, so don't explicitly initialize this member. This prepares putting driver_data in an anonymous union which requires either no initialization or named designators. But it's also a nice cleanup on its own. While add it, also remove commas after the sentinel entries. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20240509174158.2211071-2-u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2023-12-24Input: zforce_ts - accept standard touchscreen propertiesAndreas Kemnade
Only driver-specific properties were accepted, change it to use the now-available standard properties. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Link: https://lore.kernel.org/r/20231223221213.774868-4-andreas@kemnade.info Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2023-05-17Input: Switch i2c drivers back to use .probe()Uwe Kleine-König
After commit b8a1a4cd5a98 ("i2c: Provide a temporary .probe_new() call-back type"), all drivers being converted to .probe_new() and then 03c835f498b5 ("i2c: Switch .probe() to not take an id parameter") convert back to (the new) .probe() to be able to eventually drop .probe_new() from struct i2c_driver. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230517164645.162294-1-u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2023-01-09Input: zforce_ts - switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()Jonathan Cameron
SIMPLE_DEV_PM_OPS() is deprecated as it requires explicit protection against unused function warnings. The new combination of pm_sleep_ptr() and DEFINE_SIMPLE_DEV_PM_OPS() allows the compiler to see the functions, thus suppressing the warning, but still allowing the unused code to be removed. Thus also drop the __maybe_unused markings. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20230102181842.718010-68-jic23@kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2022-12-02Input: zforce_ts - Convert to i2c's .probe_new()Uwe Kleine-König
The probe function doesn't make use of the i2c_device_id * parameter so it can be trivially converted. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20221118224540.619276-268-uwe@kleine-koenig.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2020-12-02Input: use input_device_enabled()Andrzej Pietrasiewicz
Use the newly added helper in relevant input drivers. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> Link: https://lore.kernel.org/r/20200608112211.12125-3-andrzej.p@collabora.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282Thomas Gleixner
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-25Input: zforce_ts - fix dual touch recognitionKnut Wohlrab
A wrong decoding of the touch coordinate message causes a wrong touch ID. Touch ID for dual touch must be 0 or 1. According to the actual Neonode nine byte touch coordinate coding, the state is transported in the lower nibble and the touch ID in the higher nibble of payload byte five. Signed-off-by: Knut Wohlrab <Knut.Wohlrab@de.bosch.com> Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-10-02Input: zforce - simplify function return logicJavier Martinez Canillas
The invoked function already returns zero on success or a negative errno code so there is no need to open code the logic in the caller. This also fixes the following make coccicheck warning: end returns can be simplified and declaration on line 602 can be dropped Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Heiko Stuebner <heiko.stuebner@bq.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-08-03Input: zforce - make the interrupt GPIO optionalDirk Behme
Add support for hardware which uses an I2C Serializer / Deserializer (SerDes) to communicate with the zFroce touch driver. In this case the SerDes will be configured as an interrupt controller and the zForce driver will have no access to poll the GPIO line. To support this, we add two dedicated new GPIOs in the device tree: reset-gpios and irq-gpios, with the irq-gpios being optional. To not break the existing device trees, the index based 'gpios' entries are still supported, but marked as deprecated. With this, if the interrupt GPIO is available, either via the old or new device tree style, the while loop will read and handle the packets as long as the GPIO indicates that the interrupt is asserted (existing, unchanged driver behavior). If the interrupt GPIO isn't available, i.e. not configured via the new device tree style, we are falling back to one read per ISR invocation (new behavior to support the SerDes). Note that the gpiod functions help to handle the optional GPIO: devm_gpiod_get_index_optional() will return NULL in case the interrupt GPIO isn't available. And gpiod_get_value_cansleep() does cover this, too, by returning 0 in this case. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Reviewed-by: Heiko Stuebner <heiko.stuebner@bq.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-07-20Input: zforce - don't invert the interrupt GPIODirk Behme
Commit 2d53809594af ("Input: zforce_ts - convert to use the gpiod interface") converted this driver to use the gpiod functions. These functions take the active low property into account, so we don't have to invert the result of gpiod_get_value_cansleep(). This has been missed in that commit. Fix it. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-07-17Input: drop owner assignment from i2c_driverKrzysztof Kozlowski
i2c_driver does not need to set an owner because i2c_register_driver() will set it. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-07-08Input: zforce_ts - convert to use the gpiod interfaceDirk Behme
Use the new GPIO descriptor interface to handle the zForce GPIOs. This simplifies the code and allows transparently handle GPIO polarity, as specified in device tree data. Also switch to using gpio_{set|get}_value_cansleep() since none of the callers is in atomic context and cansleep variant allows more GPIO controllers to be used with the touchscreen. Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2015-05-13Input: zforce - remove duplicated includeWei Yongjun
Remove duplicated include for delay.h. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Reviewed-by: Heiko Stuebner <heiko.stuebner@bq.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-11-02Input: touchscreen - use __maybe_unused instead of ifdef around suspend/resumeJingoo Han
Use __maybe_unused instead of ifdef guards around suspend/resume functions, in order to increase build coverage and fix build warnings. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-07-21Input: zforce - add regulator handlingHeiko Stuebner
It's possible that the controller has an individually switchable power supply. Therefore add support to control a supplying regulator. As this is not always the case, the regulator is requested as optional. Signed-off-by: Heiko Stuebner <heiko.stuebner@bq.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-05-14Input: zforce - make of_device_id array constJingoo Han
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-03-01Merge tag 'v3.14-rc4' into nextDmitry Torokhov
Merge with Linux 3.14-rc4 to bring devm_request_any_context_irq().
2014-01-27Input: zforce - add devicetree supportHeiko Stübner
This makes the zforce driver usable on devicetree-based platforms too. Signed-off-by: Heiko Stuebner <heiko.stuebner@bqreaders.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-27Input: zforce - use internal pdata pointer instead of dev_get_platdataHeiko Stübner
Devicetree support will be creating its own platfprm data structure that is not attached to the device. Let's use the internal pointer to the pdata instead of re-fetching it with dev_get_platdata(). Signed-off-by: Heiko Stuebner <heiko.stuebner@bqreaders.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-27Input: zforce - reduce stack memory allocated to framesLuis Ortega
A frame is a u8 array with the following structure: [PAYLOAD_HEADER, PAYLOAD_LENGTH, ...PAYLOAD_BODY...] PAYLOAD_BODY can be at most 255 bytes long, as it's size is represented by PAYLOAD_LENGTH. Therefore we can reduce the stack memory allocated to payload_buffer[] roughly by half, from 512 to 257 bytes. Signed-off-by: Luis Ortega <luiorpe1@upv.es> Acked-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl) Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-27Input: zforce - remove unnecessary payload data checksLuis Ortega
The function zforce_read_packet() reads 2 values (bytes) of payload header, validates them and then proceeds to read the payload body. The function stores all these in a u8 buffer. The PAYLOAD_LENGTH check seems to be trying to detect an overflow error. However, since we are just reading a u8 value from the buffer, these checks are unnecessary and we should simply compare against zero. Signed-off-by: Luis Ortega <luiorpe1@upv.es> Acked-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl) Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-27Input: zforce - fix lines exceeding 80 columnsLuis Ortega
Fixed lines exceeding 80 characters long wherever possible, as per the coding style. Signed-off-by: Luis Ortega <luiorpe1@upv.es> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-27Input: zforce - fix spelling errorsLuis Ortega
Fixed a few spelling errors. Signed-off-by: Luis Ortega <luiorpe1@upv.es> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2014-01-23Merge branch 'next' into for-linusDmitry Torokhov
First round of input updates for 3.14.
2013-12-18Input: zforce - fix error return code in zforce_start()Wei Yongjun
The error code was not set if unable to set config, so the error condition wasn't reflected in the return value. Fix to return a negative error code from the error handling case instead of 0. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-12-15Input: zforce - fix possible driver hang during suspendHeiko Stübner
handle_level_irq masks the interrupt before handling it, and only unmasks it after the handler is finished. So when a touch event happens after threads are suspended, but before the system is fully asleep the irq handler tries to wakeup the thread which will only happen on the next resume, resulting in the wakeup event never being sent and the driver not being able to wake the system from sleep due to the masked irq. Therefore move the wakeup_event to a small non-threaded handler. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-10-31Input: add driver for Neonode zForce based touchscreensHeiko Stübner
This adds a driver for touchscreens using the zforce infrared technology from Neonode connected via i2c to the host system. It supports multitouch with up to two fingers and tracking of the contacts in hardware. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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