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source | linux | .. SPDX-License-Identifier: GPL-2.0
=====================
IIO Interfacing Tools
=====================
1. Linux Kernel Tools
=====================
Linux Kernel provides some userspace tools that can be used to retrieve data
from IIO sysfs:
* lsiio: example application that provides a list of IIO devices and triggers... | Documentation/iio/iio_tools.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============
Industrial I/O
==============
.. toctree::
:maxdepth: 1
iio_adc
iio_configfs
iio_devbuf
iio_dmabuf_api
iio_tools
Industrial I/O Kernel Drivers
=============================
.. toctree::
:maxdepth: 1
ad3552r
ad4000
ad4030
ad4062
... | Documentation/iio/index.rst | null | null | null | null | null |
source | linux | ==============================
OPT4060 driver
==============================
1. Overview
=============================
This driver supports the Texas Instrument RGBW high resolution color sensor over
I2C.
https://www.ti.com/lit/gpn/opt4060
The driver supports:
- Raw values for red, green, blue and clear.
- Illuminan... | Documentation/iio/opt4060.rst | null | null | null | null | null |
source | linux | ===========================
InfiniBand Midlayer Locking
===========================
This guide is an attempt to make explicit the locking assumptions
made by the InfiniBand midlayer. It describes the requirements on
both low-level drivers that sit below the midlayer and upper level
protocols that use the midl... | Documentation/infiniband/core_locking.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==========
InfiniBand
==========
.. toctree::
:maxdepth: 1
core_locking
ipoib
opa_vnic
sysfs
tag_matching
ucaps
user_mad
user_verbs | Documentation/infiniband/index.rst | null | null | null | null | null |
source | linux | ==================
IP over InfiniBand
==================
The ib_ipoib driver is an implementation of the IP over InfiniBand
protocol as specified by RFC 4391 and 4392, issued by the IETF ipoib
working group. It is a "native" implementation in the sense of
setting the interface type to ARPHRD_INFINIBAND and th... | Documentation/infiniband/ipoib.rst | null | null | null | null | null |
source | linux | =================================================================
Intel Omni-Path (OPA) Virtual Network Interface Controller (VNIC)
=================================================================
Intel Omni-Path (OPA) Virtual Network Interface Controller (VNIC) feature
supports Ethernet functionality over Omni-Path ... | Documentation/infiniband/opa_vnic.rst | null | null | null | null | null |
source | linux | ===========
Sysfs files
===========
The sysfs interface has moved to
Documentation/ABI/stable/sysfs-class-infiniband. | Documentation/infiniband/sysfs.rst | null | null | null | null | null |
source | linux | ==================
Tag matching logic
==================
The MPI standard defines a set of rules, known as tag-matching, for matching
source send operations to destination receives. The following parameters must
match the following source and destination parameters:
* Communicator
* User tag - wild card may be speci... | Documentation/infiniband/tag_matching.rst | null | null | null | null | null |
source | linux | =================================
Infiniband Userspace Capabilities
=================================
User CAPabilities (UCAPs) provide fine-grained control over specific
firmware features in Infiniband (IB) devices. This approach offers
more granular capabilities than the existing Linux capabilities,
whic... | Documentation/infiniband/ucaps.rst | null | null | null | null | null |
source | linux | ====================
Userspace MAD access
====================
Device files
============
Each port of each InfiniBand device has a "umad" device and an
"issm" device attached. For example, a two-port HCA will have two
umad devices and two issm devices, while a switch will have one
device of each type (for sw... | Documentation/infiniband/user_mad.rst | null | null | null | null | null |
source | linux | ======================
Userspace verbs access
======================
The ib_uverbs module, built by enabling CONFIG_INFINIBAND_USER_VERBS,
enables direct userspace access to IB hardware via "verbs," as
described in chapter 11 of the InfiniBand Architecture Specification.
To use the verbs, the libibverbs libra... | Documentation/infiniband/user_verbs.rst | null | null | null | null | null |
source | linux | .. _input-event-codes:
=================
Input event codes
=================
The input protocol uses a map of types and codes to express input device values
to userspace. This document describes the types and codes and how and when they
may be used.
A single hardware event generates multiple input events. Each inpu... | Documentation/input/event-codes.rst | null | null | null | null | null |
source | linux | ========================
Force feedback for Linux
========================
:Author: Johann Deneux <johann.deneux@gmail.com> on 2001/04/22.
:Updated: Anssi Hannula <anssi.hannula@gmail.com> on 2006/04/09.
You may redistribute this file. Please remember to include shape.svg and
interactive.svg as well.
Introduction
~~... | Documentation/input/ff.rst | null | null | null | null | null |
source | linux | ---------------------------
Linux Gamepad Specification
---------------------------
:Author: 2013 by David Herrmann <dh.herrmann@gmail.com>
Introduction
~~~~~~~~~~~~
Linux provides many different input drivers for gamepad hardware. To avoid
having user-space deal with different button-mappings for each gamepad, this... | Documentation/input/gamepad.rst | null | null | null | null | null |
source | linux | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Programming gameport drivers
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A basic classic gameport
~~~~~~~~~~~~~~~~~~~~~~~~
If the gameport doesn't provide more than the inb()/outb() functionality,
the code needed to register it with the joystick drivers is simple::
struct gameport gameport;
gameport... | Documentation/input/gameport-programming.rst | null | null | null | null | null |
source | linux | ===================
Input Documentation
===================
Contents:
.. toctree::
:maxdepth: 2
input_uapi
input_kapi
devices/index | Documentation/input/index.rst | null | null | null | null | null |
source | linux | ===============================
Creating an input device driver
===============================
The simplest example
~~~~~~~~~~~~~~~~~~~~
Here comes a very simple example of an input device driver. The device has
just one button and the button is accessible at i/o port BUTTON_PORT. When
pressed or released a BUTTON_I... | Documentation/input/input-programming.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
============
Introduction
============
:Copyright: |copy| 1999-2001 Vojtech Pavlik <vojtech@ucw.cz> - Sponsored by SuSE
Architecture
============
Input subsystem is a collection of drivers that is designed to support
all input devices under Linux. Most of the drivers reside in
drivers/inpu... | Documentation/input/input.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
################################
Linux Input Subsystem kernel API
################################
.. toctree::
:caption: Table of Contents
:maxdepth: 2
:numbered:
input-programming
gameport-programming
notifier | Documentation/input/input_kapi.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
###################################
Linux Input Subsystem userspace API
###################################
.. toctree::
:caption: Table of Contents
:maxdepth: 2
:numbered:
input
event-codes
multi-touch-protocol
gamepad
ff
joydev/index
uinput
userio | Documentation/input/input_uapi.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
=========================
Multi-touch (MT) Protocol
=========================
:Copyright: |copy| 2009-2010 Henrik Rydberg <rydberg@euromail.se>
Introduction
------------
In order to utilize the full power of the new multi-touch and multi-user
devices, a way to report detailed data from mu... | Documentation/input/multi-touch-protocol.rst | null | null | null | null | null |
source | linux | =================
Keyboard notifier
=================
One can use register_keyboard_notifier to get called back on keyboard
events (see kbd_keycode() function for details). The passed structure is
keyboard_notifier_param (see <linux/keyboard.h>):
- 'vc' always provide the VC for which the keyboard event applies;
- '... | Documentation/input/notifier.rst | null | null | null | null | null |
source | linux | =============
uinput module
=============
Introduction
============
uinput is a kernel module that makes it possible to emulate input devices
from userspace. By writing to /dev/uinput (or /dev/input/uinput) device, a
process can create a virtual input device with specific capabilities. Once
this virtual device is cre... | Documentation/input/uinput.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
===================
The userio Protocol
===================
:Copyright: |copy| 2015 Stephen Chandler Paul <thatslyude@gmail.com>
Sponsored by Red Hat
Introduction
=============
This module is intended to try to make the lives of input driver developers
easier by allowing them to test va... | Documentation/input/userio.rst | null | null | null | null | null |
source | linux | ----------------------
ALPS Touchpad Protocol
----------------------
Introduction
------------
Currently the ALPS touchpad driver supports seven protocol versions in use by
ALPS touchpads, called versions 1, 2, 3, 4, 5, 6, 7 and 8.
Since roughly mid-2010 several new ALPS touchpads have been released and
integrated in... | Documentation/input/devices/alps.rst | null | null | null | null | null |
source | linux | ===============
Amiga joysticks
===============
Pinouts
=======
Amiga 4-joystick parallel port extension
----------------------------------------
Parallel port pins:
===== ======== ==== ==========
Pin Meaning Pin Meaning
===== ======== ==== ==========
2 Up1 6 Up2
3 Down1 7 Down2
4 ... | Documentation/input/devices/amijoy.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
----------------------------------
Apple Touchpad Driver (appletouch)
----------------------------------
:Copyright: |copy| 2005 Stelian Pop <stelian@popies.net>
appletouch is a Linux kernel driver for the USB touchpad found on post
February 2005 and October 2005 Apple Aluminium Powerbooks.... | Documentation/input/devices/appletouch.rst | null | null | null | null | null |
source | linux | ====================================
Intelligent Keyboard (ikbd) Protocol
====================================
Introduction
============
The Atari Corp. Intelligent Keyboard (ikbd) is a general purpose keyboard
controller that is flexible enough that it can be used in a variety of
products without modification. The ... | Documentation/input/devices/atarikbd.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
------------------------
BCM5974 Driver (bcm5974)
------------------------
:Copyright: |copy| 2008-2009 Henrik Rydberg <rydberg@euromail.se>
The USB initialization and package decoding was made by Scott Shawcroft as
part of the touchd user-space driver project:
:Copyright: |copy| 2008 Scot... | Documentation/input/devices/bcm5974.rst | null | null | null | null | null |
source | linux | CMA3000-D0x Accelerometer
=========================
Supported chips:
* VTI CMA3000-D0x
Datasheet:
CMA3000-D0X Product Family Specification 8281000A.02.pdf
<http://www.vti.fi/en/>
:Author: Hemanth V <hemanthv@ti.com>
Description
-----------
CMA3000 Tri-axis accelerometer supports Motion detect, Measurement and... | Documentation/input/devices/cma3000_d0x.rst | null | null | null | null | null |
source | linux | Crystal SoundFusion CS4610/CS4612/CS461 joystick
================================================
This is a new low-level driver to support analog joystick attached to
Crystal SoundFusion CS4610/CS4612/CS4615. This code is based upon
Vortex/Solo drivers as an example of decoration style, and ALSA
0.5.8a kernel drivers... | Documentation/input/devices/cs461x.rst | null | null | null | null | null |
source | linux | EDT ft5x06 based Polytouch devices
----------------------------------
The edt-ft5x06 driver is useful for the EDT "Polytouch" family of capacitive
touch screens. Note that it is *not* suitable for other devices based on the
focaltec ft5x06 devices, since they contain vendor-specific firmware. In
particular this driver... | Documentation/input/devices/edt-ft5x06.rst | null | null | null | null | null |
source | linux | Elantech Touchpad Driver
========================
Copyright (C) 2007-2008 Arjan Opmeer <arjan@opmeer.net>
Extra information for hardware version 1 found and
provided by Steve Havelka
Version 2 (EeePC) hardware support based on patches
received from Woody at Xandros and forwarded to me
by user StewieGriffin at ... | Documentation/input/devices/elantech.rst | null | null | null | null | null |
source | linux | ===============
Iforce Protocol
===============
:Author: Johann Deneux <johann.deneux@gmail.com>
Home page at `<http://web.archive.org/web/*/http://www.esil.univ-mrs.fr>`_
:Additions: by Vojtech Pavlik.
Introduction
============
This document describes what I managed to discover about the protocol used to
specify... | Documentation/input/devices/iforce-protocol.rst | null | null | null | null | null |
source | linux | Driver-specific documentation
=============================
This section provides information about various devices supported by the
Linux kernel, their protocols, and driver details.
.. toctree::
:maxdepth: 2
:numbered:
:glob:
* | Documentation/input/devices/index.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
.. _joystick-parport:
==============================
Parallel Port Joystick Drivers
==============================
:Copyright: |copy| 1998-2000 Vojtech Pavlik <vojtech@ucw.cz>
:Copyright: |copy| 1998 Andree Borrmann <a.borrmann@tu-bs.de>
Sponsored by SuSE
Disclaimer
==========
Any infor... | Documentation/input/devices/joystick-parport.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
=========================
N-Trig touchscreen Driver
=========================
:Copyright: |copy| 2008-2010 Rafi Rubin <rafi@seas.upenn.edu>
:Copyright: |copy| 2009-2010 Stephane Chatty
This driver provides support for N-Trig pen and multi-touch sensors. Single
and multi-touch events are tr... | Documentation/input/devices/ntrig.rst | null | null | null | null | null |
source | linux | =======================================================
pxrc - PhoenixRC Flight Controller Adapter
=======================================================
:Author: Marcus Folkesson <marcus.folkesson@gmail.com>
This driver let you use your own RC controller plugged into the
adapter that comes with PhoenixRC or other c... | Documentation/input/devices/pxrc.rst | null | null | null | null | null |
source | linux | ============================================================
rotary-encoder - a generic driver for GPIO connected devices
============================================================
:Author: Daniel Mack <daniel@caiaq.de>, Feb 2009
Function
--------
Rotary encoders are devices which are connected to the CPU or other... | Documentation/input/devices/rotary-encoder.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
=================
Sentelic Touchpad
=================
:Copyright: |copy| 2002-2011 Sentelic Corporation.
:Last update: Dec-07-2011
Finger Sensing Pad Intellimouse Mode (scrolling wheel, 4th and 5th buttons)
============================================================================
A) M... | Documentation/input/devices/sentelic.rst | null | null | null | null | null |
source | linux | ===========================
Walkera WK-0701 transmitter
===========================
Walkera WK-0701 transmitter is supplied with a ready to fly Walkera
helicopters such as HM36, HM37, HM60. The walkera0701 module enables to use
this transmitter as joystick
Devel homepage and download:
http://zub.fei.tuke.sk/walkera-w... | Documentation/input/devices/walkera0701.rst | null | null | null | null | null |
source | linux | =======================================================
xpad - Linux USB driver for Xbox compatible controllers
=======================================================
This driver exposes all first-party and third-party Xbox compatible
controllers. It has a long history and has enjoyed considerable usage
as Windows' x... | Documentation/input/devices/xpad.rst | null | null | null | null | null |
source | linux | ===============================================
Driver documentation for yealink usb-p1k phones
===============================================
Status
======
The p1k is a relatively cheap usb 1.1 phone with:
- keyboard full support, yealink.ko / input event API
- LCD full support, yealink.ko / sysfs API
- L... | Documentation/input/devices/yealink.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
======================
Linux Joystick support
======================
:Copyright: |copy| 1996-2000 Vojtech Pavlik <vojtech@ucw.cz> - Sponsored by SuSE
.. toctree::
:caption: Table of Contents
:maxdepth: 3
joystick
joystick-api | Documentation/input/joydev/index.rst | null | null | null | null | null |
source | linux | .. _joystick-api:
=====================
Programming Interface
=====================
:Author: Ragnar Hojland Espinosa <ragnar@macula.net> - 7 Aug 1998
Introduction
============
.. important::
This document describes legacy ``js`` interface. Newer clients are
encouraged to switch to the generic event (``evdev``... | Documentation/input/joydev/joystick-api.rst | null | null | null | null | null |
source | linux | .. include:: <isonum.txt>
.. _joystick-doc:
Introduction
============
The joystick driver for Linux provides support for a variety of joysticks
and similar devices. It is based on a larger project aiming to support all
input devices in Linux.
The mailing list for the project is:
linux-input@vger.kernel.org
send ... | Documentation/input/joydev/joystick.rst | null | null | null | null | null |
source | linux | =======
Credits
=======
I want to thank all who contributed to this project and especially to:
(in alphabetical order)
Thomas Bogendörfer (tsbogend@bigbug.franken.de)
Tester, lots of bugfixes and hints.
Alan Cox (alan@lxorguk.ukuu.org.uk)
For help getting into standard-kernel.
Henner Eisen (eis@baty.hanse.de)
... | Documentation/isdn/credits.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====
ISDN
====
.. toctree::
:maxdepth: 2
interface_capi
m_isdn
credits | Documentation/isdn/index.rst | null | null | null | null | null |
source | linux | =========================================
Kernel CAPI Interface to Hardware Drivers
=========================================
1. Overview
===========
From the CAPI 2.0 specification:
COMMON-ISDN-API (CAPI) is an application programming interface standard used
to access ISDN equipment connected to basic rate interface... | Documentation/isdn/interface_capi.rst | null | null | null | null | null |
source | linux | ============
mISDN Driver
============
mISDN is a new modular ISDN driver, in the long term it should replace
the old I4L driver architecture for passive ISDN cards.
It was designed to allow a broad range of applications and interfaces
but only have the basic function in kernel, the interface to the user
space is base... | Documentation/isdn/m_isdn.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0-only
==========================
Bash completion for Kbuild
==========================
The kernel build system is written using Makefiles, and Bash completion
for the `make` command is available through the `bash-completion`_ project.
However, the Makefiles for the kernel build are... | Documentation/kbuild/bash-completion.rst | null | null | null | null | null |
source | linux | =========================
GCC plugin infrastructure
=========================
Introduction
============
GCC plugins are loadable modules that provide extra features to the
compiler [1]_. They are useful for runtime instrumentation and static analysis.
We can analyse, change and add further code during compilation vi... | Documentation/kbuild/gcc-plugins.rst | null | null | null | null | null |
source | linux | =======================
DWARF module versioning
=======================
Introduction
============
When CONFIG_MODVERSIONS is enabled, symbol versions for modules
are typically calculated from preprocessed source code using the
**genksyms** tool. However, this is incompatible with languages such
as Rust, where the so... | Documentation/kbuild/gendwarfksyms.rst | null | null | null | null | null |
source | linux | =============================================
Exporting kernel headers for use by userspace
=============================================
The "make headers_install" command exports the kernel's header files in a
form suitable for use by userspace programs.
The linux kernel's exported header files describe the API for... | Documentation/kbuild/headers_install.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================
Kernel Build System
===================
.. toctree::
:maxdepth: 1
kconfig-language
kconfig-macro-language
kbuild
kconfig
makefiles
modules
headers_install
issues
reproducible-builds
gcc-plugins
llvm
gendwar... | Documentation/kbuild/index.rst | null | null | null | null | null |
source | linux | ================
Recursion issues
================
issue #1
--------
.. literalinclude:: Kconfig.recursion-issue-01
:language: kconfig
issue #2
--------
.. literalinclude:: Kconfig.recursion-issue-02
:language: kconfig | Documentation/kbuild/issues.rst | null | null | null | null | null |
source | linux | ======
Kbuild
======
Output files
============
modules.order
-------------
This file records the order in which modules appear in Makefiles. This
is used by modprobe to deterministically resolve aliases that match
multiple modules.
modules.builtin
---------------
This file lists all modules that are built into the ... | Documentation/kbuild/kbuild.rst | null | null | null | null | null |
source | linux | ================
Kconfig Language
================
Introduction
------------
The configuration database is a collection of configuration options
organized in a tree structure::
+- Code maturity level options
| +- Prompt for development and/or incomplete code/drivers
+- General setup
| +- Networking support
| ... | Documentation/kbuild/kconfig-language.rst | null | null | null | null | null |
source | linux | ======================
Kconfig macro language
======================
Concept
-------
The basic idea was inspired by Make. When we look at Make, we notice sort of
two languages in one. One language describes dependency graphs consisting of
targets and prerequisites. The other is a macro language for performing textual... | Documentation/kbuild/kconfig-macro-language.rst | null | null | null | null | null |
source | linux | =================================
Configuration targets and editors
=================================
This file contains some assistance for using ``make *config``.
Use ``make help`` to list all of the possible configuration targets.
The xconfig ('qconf'), menuconfig ('mconf'), and nconfig ('nconf')
programs also ha... | Documentation/kbuild/kconfig.rst | null | null | null | null | null |
source | linux | .. _kbuild_llvm:
==============================
Building Linux with Clang/LLVM
==============================
This document covers how to build the Linux kernel with Clang and LLVM
utilities.
About
-----
The Linux kernel has always traditionally been compiled with GNU toolchains
such as GCC and binutils. Ongoing wo... | Documentation/kbuild/llvm.rst | null | null | null | null | null |
source | linux | ======================
Linux Kernel Makefiles
======================
This document describes the Linux kernel Makefiles.
Overview
========
The Makefiles have five parts::
Makefile the top Makefile.
.config the kernel configuration file.
arch/$(SRCARCH)/Makefile the arch ... | Documentation/kbuild/makefiles.rst | null | null | null | null | null |
source | linux | =========================
Building External Modules
=========================
This document describes how to build an out-of-tree kernel module.
Introduction
============
"kbuild" is the build system used by the Linux kernel. Modules must use
kbuild to stay compatible with changes in the build infrastructure and
to ... | Documentation/kbuild/modules.rst | null | null | null | null | null |
source | linux | ===================
Reproducible builds
===================
It is generally desirable that building the same source code with
the same set of tools is reproducible, i.e. the output is always
exactly the same. This makes it possible to verify that the build
infrastructure for a binary distribution or embedded system h... | Documentation/kbuild/reproducible-builds.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=============
False Sharing
=============
What is False Sharing
=====================
False sharing is related with cache mechanism of maintaining the data
coherence of one cache line stored in multiple CPU's caches; then
academic definition for it is in [1]_. Consider a struct wit... | Documentation/kernel-hacking/false-sharing.rst | null | null | null | null | null |
source | linux | .. _kernel_hacking_hack:
============================================
Unreliable Guide To Hacking The Linux Kernel
============================================
:Author: Rusty Russell
Introduction
============
Welcome, gentle reader, to Rusty's Remarkably Unreliable Guide to Linux
Kernel Hacking. This document descr... | Documentation/kernel-hacking/hacking.rst | null | null | null | null | null |
source | linux | .. _kernel_hacking:
=====================
Kernel Hacking Guides
=====================
.. toctree::
:maxdepth: 2
hacking
locking
false-sharing | Documentation/kernel-hacking/index.rst | null | null | null | null | null |
source | linux | .. _kernel_hacking_lock:
===========================
Unreliable Guide To Locking
===========================
:Author: Rusty Russell
Introduction
============
Welcome, to Rusty's Remarkably Unreliable Guide to Kernel Locking
issues. This document describes the locking systems in the Linux Kernel
in 2.6.
With the wi... | Documentation/kernel-hacking/locking.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====
LEDs
====
.. toctree::
:maxdepth: 1
leds-class
leds-class-flash
leds-class-multicolor
ledtrig-oneshot
ledtrig-transient
ledtrig-usbport
uleds
leds-blinkm
leds-cht-wcove
leds-el15203000
leds-lm3556
leds-lp3944
leds-lp5521
leds-lp5... | Documentation/leds/index.rst | null | null | null | null | null |
source | linux | ==================
Leds BlinkM driver
==================
The leds-blinkm driver supports the devices of the BlinkM family.
They are RGB-LED modules driven by a (AT)tiny microcontroller and
communicate through I2C. The default address of these modules is
0x09 but this can be changed through a command. By this you coul... | Documentation/leds/leds-blinkm.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===========================================================
Kernel driver for Intel Cherry Trail Whiskey Cove PMIC LEDs
===========================================================
/sys/class/leds/<led>/hw_pattern
--------------------------------
Specify a hardware pattern for the ... | Documentation/leds/leds-cht-wcove.rst | null | null | null | null | null |
source | linux | ==============================
Flash LED handling under Linux
==============================
Some LED devices provide two modes - torch and flash. In the LED subsystem
those modes are supported by LED class (see Documentation/leds/leds-class.rst)
and LED Flash class respectively. The torch mode related features are en... | Documentation/leds/leds-class-flash.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
====================================
Multicolor LED handling under Linux
====================================
Description
===========
The multicolor class groups monochrome LEDs and allows controlling two
aspects of the final combined color: hue and lightness. The former is
control... | Documentation/leds/leds-class-multicolor.rst | null | null | null | null | null |
source | linux | ========================
LED handling under Linux
========================
In its simplest form, the LED class just allows control of LEDs from
userspace. LEDs appear in /sys/class/leds/. The maximum brightness of the
LED is defined in max_brightness file. The brightness file will set the brightness
of the LED (taking... | Documentation/leds/leds-class.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==================================
Kernel driver for Crane EL15203000
==================================
/sys/class/leds/<led>/hw_pattern
--------------------------------
Specify a hardware pattern for the EL15203000 LED.
The LEDs board supports only predefined patterns by firmwa... | Documentation/leds/leds-el15203000.rst | null | null | null | null | null |
source | linux | ========================
Kernel driver for lm3556
========================
* Texas Instrument:
1.5 A Synchronous Boost LED Flash Driver w/ High-Side Current Source
* Datasheet: http://www.national.com/ds/LM/LM3556.pdf
Authors:
- Daniel Jeong
Contact:Daniel Jeong(daniel.jeong-at-ti.com, gshark.jeong-at-gmail... | Documentation/leds/leds-lm3556.rst | null | null | null | null | null |
source | linux | ====================
Kernel driver lp3944
====================
* National Semiconductor LP3944 Fun-light Chip
Prefix: 'lp3944'
Addresses scanned: None (see the Notes section below)
Datasheet:
Publicly available at the National Semiconductor website
http://www.national.com/pf/LP/LP3944.html
Authors... | Documentation/leds/leds-lp3944.rst | null | null | null | null | null |
source | linux | ========================
Kernel driver for lp5521
========================
* National Semiconductor LP5521 led driver chip
* Datasheet: http://www.national.com/pf/LP/LP5521.html
Authors: Mathias Nyman, Yuri Zaporozhets, Samu Onkalo
Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com)
Description
-----------
LP5521 ca... | Documentation/leds/leds-lp5521.rst | null | null | null | null | null |
source | linux | ========================
Kernel driver for lp5523
========================
* National Semiconductor LP5523 led driver chip
* Datasheet: http://www.national.com/pf/LP/LP5523.html
Authors: Mathias Nyman, Yuri Zaporozhets, Samu Onkalo
Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com)
Description
-----------
LP5523 can ... | Documentation/leds/leds-lp5523.rst | null | null | null | null | null |
source | linux | ========================
Kernel driver for lp5562
========================
* TI LP5562 LED Driver
Author: Milo(Woogyom) Kim <milo.kim@ti.com>
Description
===========
LP5562 can drive up to 4 channels. R/G/B and White.
LEDs can be controlled directly via the led class control interface.
All four channels can ... | Documentation/leds/leds-lp5562.rst | null | null | null | null | null |
source | linux | =================================================
LP5521/LP5523/LP55231/LP5562/LP8501 Common Driver
=================================================
Authors: Milo(Woogyom) Kim <milo.kim@ti.com>
Description
-----------
LP5521, LP5523/55231, LP5562 and LP8501 have common features as below.
Register access via the I... | Documentation/leds/leds-lp55xx.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
========================
Kernel driver for lp5812
========================
* TI/National Semiconductor LP5812 LED Driver
* Datasheet: https://www.ti.com/product/LP5812#tech-docs
Authors: Jared Zhou <jared-zhou@ti.com>
Description
===========
The LP5812 is a 4x3 matrix LED driver... | Documentation/leds/leds-lp5812.rst | null | null | null | null | null |
source | linux | =======================================
Kernel driver for Mellanox systems LEDs
=======================================
Provide system LED support for the nex Mellanox systems:
"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
"msn2410", "msb7800", "msn2740", "msn2100".
Description
-----------
Driver provides th... | Documentation/leds/leds-mlxcpld.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=========================================
The device for Mediatek MT6370 RGB LED
=========================================
Description
-----------
The MT6370 integrates a four-channel RGB LED driver, designed to provide a
variety of lighting effect for mobile device applications. ... | Documentation/leds/leds-mt6370-rgb.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
==============================
Kernel driver for Qualcomm LPG
==============================
Description
-----------
The Qualcomm LPG can be found in a variety of Qualcomm PMICs and consists of a
number of PWM channels, a programmable pattern lookup table and a RGB LED
current sin... | Documentation/leds/leds-qcom-lpg.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================================
Kernel driver for Spreadtrum SC27XX
===================================
/sys/class/leds/<led>/hw_pattern
--------------------------------
Specify a hardware pattern for the SC27XX LED. For the SC27XX
LED controller, it only supports 4 stages to ... | Documentation/leds/leds-sc27xx.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
============================================
Kernel driver for STMicroelectronics LED1202
============================================
/sys/class/leds/<led>/hw_pattern
--------------------------------
Specify a hardware pattern for the ST1202 LED. The LED controller
implements 12 ... | Documentation/leds/leds-st1202.rst | null | null | null | null | null |
source | linux | ====================
One-shot LED Trigger
====================
This is a LED trigger useful for signaling the user of an event where there are
no clear trap points to put standard led-on and led-off settings. Using this
trigger, the application needs only to signal the trigger when an event has
happened, then the tri... | Documentation/leds/ledtrig-oneshot.rst | null | null | null | null | null |
source | linux | =====================
LED Transient Trigger
=====================
The leds timer trigger does not currently have an interface to activate
a one shot timer. The current support allows for setting two timers, one for
specifying how long a state to be on, and the second for how long the state
to be off. The delay_on valu... | Documentation/leds/ledtrig-transient.rst | null | null | null | null | null |
source | linux | ====================
USB port LED trigger
====================
This LED trigger can be used for signalling to the user a presence of USB device
in a given port. It simply turns on LED when device appears and turns it off
when it disappears.
It requires selecting USB ports that should be observed. All available ones a... | Documentation/leds/ledtrig-usbport.rst | null | null | null | null | null |
source | linux | ==============
Userspace LEDs
==============
The uleds driver supports userspace LEDs. This can be useful for testing
triggers and can also be used to implement virtual LEDs.
Usage
=====
When the driver is loaded, a character device is created at /dev/uleds. To
create a new LED class device, open /dev/uleds and wri... | Documentation/leds/uleds.rst | null | null | null | null | null |
source | linux | -*- org -*-
It is somehow important to provide consistent interface to the
userland. LED devices have one problem there, and that is naming of
directories in /sys/class/leds. It would be nice if userland would
just know right "name" for given LED function, but situation got more
complex.
Anyway, if backwards compatib... | Documentation/leds/well-known-leds.txt | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
=================
Livepatching APIs
=================
Livepatch Enablement
====================
.. kernel-doc:: kernel/livepatch/core.c
:export:
Shadow Variables
================
.. kernel-doc:: kernel/livepatch/shadow.c
:export:
System State Changes
====================... | Documentation/livepatch/api.rst | null | null | null | null | null |
source | linux | ======================
(Un)patching Callbacks
======================
Livepatch (un)patch-callbacks provide a mechanism for livepatch modules
to execute callback functions when a kernel object is (un)patched. They
can be considered a **power feature** that **extends livepatching abilities**
to include:
- Safe updat... | Documentation/livepatch/callbacks.rst | null | null | null | null | null |
source | linux | ===================================
Atomic Replace & Cumulative Patches
===================================
There might be dependencies between livepatches. If multiple patches need
to do different changes to the same function(s) then we need to define
an order in which the patches will be installed. And function impl... | Documentation/livepatch/cumulative-patches.rst | null | null | null | null | null |
source | linux | .. SPDX-License-Identifier: GPL-2.0
===================
Kernel Livepatching
===================
.. toctree::
:maxdepth: 1
livepatch
callbacks
cumulative-patches
module-elf-format
shadow-vars
system-state
reliable-stacktrace
api | Documentation/livepatch/index.rst | null | null | null | null | null |
source | linux | =========
Livepatch
=========
This document outlines basic information about kernel livepatching.
.. Table of Contents:
.. contents:: :local:
1. Motivation
=============
There are many situations where users are reluctant to reboot a system. It may
be because their system is performing complex scientific computat... | Documentation/livepatch/livepatch.rst | null | null | null | null | null |
source | linux | ===========================
Livepatch module ELF format
===========================
This document outlines the ELF format requirements that livepatch modules must follow.
.. Table of Contents
.. contents:: :local:
1. Background and motivation
============================
Formerly, livepatch required separate arc... | Documentation/livepatch/module-elf-format.rst | null | null | null | null | null |
source | linux | ===================
Reliable Stacktrace
===================
This document outlines basic information about reliable stacktracing.
.. Table of Contents:
.. contents:: :local:
1. Introduction
===============
The kernel livepatch consistency model relies on accurately identifying which
functions may have live state a... | Documentation/livepatch/reliable-stacktrace.rst | null | null | null | null | null |
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