kernel/linux.git/include/linux/serio.h, branch v6.6.132

Input: serio - define serio_pause_rx guard to pause and resume serio ports

2025-02-27T12:10:45+00:00

[ Upstream commit 0e45a09a1da0872786885c505467aab8fb29b5b4 ] serio_pause_rx() and serio_continue_rx() are usually used together to temporarily stop receiving interrupts/data for a given serio port. Define "serio_pause_rx" guard for this so that the port is always resumed once critical section is over. Example: scoped_guard(serio_pause_rx, elo->serio) { elo->expected_packet = toupper(packet[0]); init_completion(&elo->cmd_done); } Link: https://lore.kernel.org/r/20240905041732.2034348-2-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov Stable-dep-of: 08bd5b7c9a24 ("Input: synaptics - fix crash when enabling pass-through port") Signed-off-by: Sasha Levin

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

Input: serio - add fast reconnect option

2017-03-25T17:37:26+00:00

Devices connected to serio bus are quite slow, and to improve apparent speed of resume process, serio core resumes (reconnects) its devices asynchronously, by posting port reconnect requests to a workqueue. Unfortunately this means that if there is a dependent device of a given serio port (for example SMBus part of touchpad connected via both PS/2 and SMBus), we do not have a good way of ensuring resume order. This change allows drivers to define "fast reconnect" handlers that would be called in-line during system resume. Drivers need to ensure that these handlers are truly "fast". Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: i8042 - break load dependency between atkbd/psmouse and i8042

2016-07-27T21:20:09+00:00

As explained in 1407814240-4275-1-git-send-email-decui@microsoft.com we have a hard load dependency between i8042 and atkbd which prevents keyboard from working on Gen2 Hyper-V VMs. > hyperv_keyboard invokes serio_interrupt(), which needs a valid serio > driver like atkbd.c. atkbd.c depends on libps2.c because it invokes > ps2_command(). libps2.c depends on i8042.c because it invokes > i8042_check_port_owner(). As a result, hyperv_keyboard actually > depends on i8042.c. > > For a Generation 2 Hyper-V VM (meaning no i8042 device emulated), if a > Linux VM (like Arch Linux) happens to configure CONFIG_SERIO_I8042=m > rather than =y, atkbd.ko can't load because i8042.ko can't load(due to > no i8042 device emulated) and finally hyperv_keyboard can't work and > the user can't input: https://bugs.archlinux.org/task/39820 > (Ubuntu/RHEL/SUSE aren't affected since they use CONFIG_SERIO_I8042=y) To break the dependency we move away from using i8042_check_port_owner() and instead allow serio port owner specify a mutex that clients should use to serialize PS/2 command stream. Reported-by: Mark Laws Tested-by: Mark Laws Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov

Input: i8042 - add unmask_kbd_data option

2015-07-16T17:30:55+00:00

A big problem with the current i8042 debugging option is that it outputs data going to and from the keyboard by default. As a result, many dmesg logs uploaded by users will unintentionally contain sensitive information such as their password, as such it's probably a good idea not to output data coming from the keyboard unless specifically enabled by the user. Signed-off-by: Stephen Chandler Paul Reviewed-by: Andreas Mohr Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: serio - add firmware_id sysfs attribute

2014-04-20T05:42:19+00:00

serio devices exposed via platform firmware interfaces such as ACPI may provide additional identifying information of use to userspace. We don't associate the serio devices with the firmware device (we don't set it as parent), so there's no way for userspace to make use of this information. We cannot change the parent for serio devices instantiated though a firmware interface as that would break suspend / resume ordering. Therefore this patch adds a new firmware_id sysfs attribute so that userspace can get a string from there with any additional identifying information the firmware interface may provide. Signed-off-by: Hans de Goede Acked-by: Peter Hutterer Signed-off-by: Dmitry Torokhov

UAPI: (Scripted) Disintegrate include/linux

2012-10-13T09:46:48+00:00

Signed-off-by: David Howells Acked-by: Arnd Bergmann Acked-by: Thomas Gleixner Acked-by: Michael Kerrisk Acked-by: Paul E. McKenney Acked-by: Dave Jones

Input: serio - add helper macro for serio_driver boilerplate

2012-04-04T16:25:42+00:00

This patch introduces the module_serio_driver macro which is a convenience macro for serio driver modules similar to module_platform_driver. It is intended to be used by drivers which init/exit section does nothing but registers/unregisters the serio driver. By using this macro it is possible to eliminate a few lines of boilerplate code per serio driver. Based on work done by Lars-Peter Clausen for other buses (i2c and spi). Signed-off-by: Axel Lin Signed-off-by: Dmitry Torokhov

include: convert various register fcns to macros to avoid include chaining

2011-10-31T23:32:32+00:00

The original implementations reference THIS_MODULE in an inline. We could include , but it is better to avoid chaining. Fortunately someone else already thought of this, and made a similar inline into a #define in for device_schedule_callback(), [see commit 523ded71de0] so follow that precedent here. Also bubble up any __must_check that were used on the prev. wrapper inline functions up one to the real __register functions, to preserve any prev. sanity checks that were used in those instances. Signed-off-by: Paul Gortmaker

Input: add a driver for TSC-40 serial touchscreen

2011-09-28T17:24:14+00:00

This patch adds the TSC-40 serial touchscreen driver and should be compatible with TSC-10 and TSC-25. The driver was written by Linutronix on behalf of Bachmann electronic GmbH. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Christian Gmeiner Signed-off-by: Dmitry Torokhov