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/Documentation/devicetree/bindings/leds/
Dcommon.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jacek Anaszewski <jacek.anaszewski@gmail.com>
11 - Pavel Machek <pavel@ucw.cz>
14 LED and flash LED devices provide the same basic functionality as current
15 regulators, but extended with LED and flash LED specific features like
16 blinking patterns, flash timeout, flash faults and external flash strobe mode.
18 Many LED devices expose more than one current output that can be connected
19 to one or more discrete LED component. Since the arrangement of connections
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Dleds-bcm6328.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/leds/leds-bcm6328.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Álvaro Fernández Rojas <noltari@gmail.com>
17 as spi-gpio. See
21 exporting the 74x164 as spi-gpio prevents those LEDs to be hardware
24 BCM6328 LED controller has a HWDIS register, which controls whether a LED
25 should be controlled by a hardware signal instead of the MODE register value,
27 is usually 1:1 for hardware to LED signals, but through the activity/link
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/Documentation/admin-guide/laptops/
Dlg-laptop.rst1 .. SPDX-License-Identifier: GPL-2.0+
7 By Matan Ziv-Av <matan@svgalib.org>
11 -------
15 - FN-F1 (LG control panel) - Generates F15
16 - FN-F5 (Touchpad toggle) - Generates F21
17 - FN-F6 (Airplane mode) - Generates RFKILL
18 - FN-F9 (Reader mode) - Generates F14
23 Reader mode
24 -----------
26 Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables
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Dthinkpad-acpi.rst9 - Borislav Deianov <borislav@users.sf.net>
10 - Henrique de Moraes Holschuh <hmh@hmh.eng.br>
12 http://ibm-acpi.sf.net/
19 This driver used to be named ibm-acpi until kernel 2.6.21 and release
20 0.13-20070314. It used to be in the drivers/acpi tree, but it was
21 moved to the drivers/misc tree and renamed to thinkpad-acpi for kernel
25 The driver is named "thinkpad-acpi". In some places, like module
29 "tpacpi" is used as a shorthand where "thinkpad-acpi" would be too
33 ------
38 - Fn key combinations
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/Documentation/devicetree/bindings/usb/
Dusb251xb.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/usb/usb251xb.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Microchip USB 2.0 Hi-Speed Hub Controller
10 - Richard Leitner <richard.leitner@skidata.com>
15 - microchip,usb2422
16 - microchip,usb2512b
17 - microchip,usb2512bi
18 - microchip,usb2513b
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/Documentation/devicetree/bindings/net/
Dmicrochip,lan78xx.txt8 - compatible: Should be one of "usb424,7800", "usb424,7801" or "usb424,7850".
14 - microchip,led-modes: a 0..4 element vector, with each element configuring
15 the operating mode of an LED. Omitted LEDs are turned off. Allowed values
16 are defined in "include/dt-bindings/net/microchip-lan78xx.h".
21 &usb {
22 usb-port@1 {
25 #address-cells = <1>;
26 #size-cells = <0>;
28 usb-port@1 {
31 #address-cells = <1>;
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/Documentation/devicetree/bindings/mfd/
Dmaxim,max77693.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Chanwoo Choi <cw00.choi@samsung.com>
11 - Krzysztof Kozlowski <krzk@kernel.org>
18 includes voltage current regulators, charger, LED/flash, haptic motor driver
34 led:
37 max77693-muic:
44 const: maxim,max77693-muic
47 - compatible
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Dqcom,spmi-pmic.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/mfd/qcom,spmi-pmic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm SPMI PMICs multi-function device
13 16-bit SPMI peripheral address space into 256 smaller fixed-size regions, 256 bytes
14 each. A function can consume one or more of these fixed-size register regions.
24 - Stephen Boyd <sboyd@kernel.org>
29 - pattern: '^pmic@.*$'
30 - pattern: '^pm(a|s)?[0-9]*@.*$'
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/Documentation/admin-guide/media/
Dsi470x.rst1 .. SPDX-License-Identifier: GPL-2.0
12 -----------------------------
17 together with a small microcontroller C8051F321, to form a USB radio.
25 -------------
30 - Si4700: FM radio receiver
31 - Si4701: FM radio receiver, RDS Support
32 - Si4702: FM radio receiver
33 - Si4703: FM radio receiver, RDS Support
34 - Si4704: FM radio receiver, no external antenna required
35 - Si4705: FM radio receiver, no external antenna required, RDS support, Dig I/O
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Dphilips.rst1 .. SPDX-License-Identifier: GPL-2.0
7 E-mail: webcam@smcc.demon.nl Last updated: 2004-01-19
30 * Samsung MPC-C10
31 * Samsung MPC-C30
33 * AME CU-001
34 * Visionite VCS-UM100
35 * Visionite VCS-UC300
40 framerates; in addition the webcam uses less bandwidth on the USB bus (handy
46 the latter, since it makes troubleshooting a lot easier. The built-in
47 microphone is supported through the USB Audio class.
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/Documentation/ABI/testing/
Dsysfs-driver-wacom4 Contact: linux-bluetooth@vger.kernel.org
8 from this file returns 1 if tablet reports in high speed mode
12 What: /sys/bus/hid/devices/<bus>:<vid>:<pid>.<n>/wacom_led/led
14 Contact: linux-input@vger.kernel.org
25 Contact: linux-input@vger.kernel.org
27 <obsoleted by the LED class API now exported by the driver>
28 Writing to this file sets the status LED luminance (1..127)
35 Contact: linux-input@vger.kernel.org
37 <obsoleted by the LED class API now exported by the driver>
38 Writing to this file sets the status LED luminance (1..127)
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Dsysfs-platform-asus-wmi6 Change CPU clock configuration (write-only).
9 * 0 -> Super Performance Mode
10 * 1 -> High Performance Mode
11 * 2 -> Power Saving Mode
46 Fan boost mode:
47 * 0 - normal,
48 * 1 - overboost,
49 * 2 - silent
56 Throttle thermal policy mode:
57 * 0 - default,
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/Documentation/leds/
Dleds-class.rst2 LED handling under Linux
5 In its simplest form, the LED class just allows control of LEDs from
7 LED is defined in max_brightness file. The brightness file will set the brightness
8 of the LED (taking a value 0-max_brightness). Most LEDs don't have hardware
9 brightness support so will just be turned on for non-zero brightness settings.
11 The class also introduces the optional concept of an LED trigger. A trigger
12 is a kernel based source of led events. Triggers can either be simple or
14 existing subsystems with minimal additional code. Examples are the disk-activity,
15 nand-disk and sharpsl-charge triggers. With led triggers disabled, the code
18 Complex triggers while available to all LEDs have LED specific
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/Documentation/userspace-api/media/v4l/
Dmetafmt-d4xx.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _v4l2-meta-fmt-d4xx:
15 Intel D4xx (D435, D455 and others) cameras include per-frame metadata in their UVC
37 .. flat-table:: D4xx metadata
39 :header-rows: 1
40 :stub-columns: 0
42 * - **Field**
43 - **Description**
44 * - :cspan:`1` *Depth Control*
45 * - __u32 ID
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/Documentation/hid/
Dhid-transport.rst6 only USB was supported, but other specifications adopted the HID design and
7 provided new transport drivers. The kernel includes at least support for USB,
8 Bluetooth, I2C and user-space I/O drivers.
17 report-parsing, report interpretation and the user-space API. Device specifics
22 +-----------+ +-----------+ +-----------+ +-----------+
24 +-----------+ +-----------+ +-----------+ +-----------+
26 +------------+ +------------+
28 +------------+ +------------+
30 +------------------+ +------------------+
32 +------------------+ +------------------+
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Dhidintro.rst1 .. SPDX-License-Identifier: GPL-2.0
8 descriptors are, and of how a casual (non-kernel) programmer can deal
18 hidreport-parsing
50 Documentation/hid/hid-transport.rst). Devices may misbehave because the
53 device or interaction mode is not handled by the default code.
56 available from the `USB Implementers Forum <https://www.usb.org/>`_
57 `HID web page <https://www.usb.org/hid>`_ address:
59 * the `HID USB Device Class Definition
60 <https://www.usb.org/document-library/device-class-definition-hid-111>`_ (HID Spec from now on)
61 * the `HID Usage Tables <https://usb.org/document-library/hid-usage-tables-14>`_ (HUT from now on)
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/Documentation/admin-guide/
Ddevices.txt1 0 Unnamed devices (e.g. non-device mounts)
7 2 = /dev/kmem OBSOLETE - replaced by /proc/kcore
11 6 = /dev/core OBSOLETE - replaced by /proc/kcore
18 12 = /dev/oldmem OBSOLETE - replaced by /proc/vmcore
31 2 char Pseudo-TTY masters
37 Pseudo-tty's are named as follows:
40 the 1st through 16th series of 16 pseudo-ttys each, and
44 These are the old-style (BSD) PTY devices; Unix98
106 3 char Pseudo-TTY slaves
112 These are the old-style (BSD) PTY devices; Unix98
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Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
45 If set to native, use the device's native backlight mode.
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/Documentation/power/
Dswsusp.rst28 If you have any filesystems on USB devices mounted before software suspend,
30 you have unplugged the USB devices with mounted filesystems on them;
32 power states like "standby", which normally don't turn USB off.)
47 - If you feel ACPI works pretty well on your system, you might try::
51 - If you would like to write hibernation image to swap and then suspend
56 - If you have SATA disks, you'll need recent kernels with SATA suspend
58 are built into kernel -- not modules. [There's way to make
68 - The resume process checks for the presence of the resume device,
72 - The resume process may be triggered in two ways:
81 read-only) otherwise data may be corrupted.
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/Documentation/driver-api/media/
Dmaintainer-entry-profile.rst5 --------
13 - drivers/media
14 - drivers/staging/media
15 - Documentation/admin-guide/media
16 - Documentation/driver-api/media
17 - Documentation/userspace-api/media
18 - Documentation/devicetree/bindings/media/\ [1]_
19 - include/media
33 maintainership model is to have sub-maintainers that have a broad
34 knowledge of a specific aspect of the subsystem. It is the sub-maintainers'
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/Documentation/usb/
Dgadget_hid.rst2 Linux USB HID gadget driver
8 The HID Gadget driver provides emulation of USB Human Interface
14 https://www.usb.org/developers/hidpage/
21 HID function descriptors you want to use - E.G. something
25 #include <linux/usb/g_hid.h>
97 device type (keyboard / mouse / joystick) - E.G.::
103 values are listed at program start. In keyboard mode you can
106 For example type: g i s t r --left-shift
112 --caps-lock and hit return. A report is then sent by the
114 to the caps lock LED status::
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/Documentation/devicetree/bindings/regulator/
Dmaxim,max8997.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzk@kernel.org>
15 motor driver, flash LED driver and Micro-USB Interface Controller.
22 const: maxim,max8997-pmic
24 charger-supply:
30 - description: irq1 interrupt
31 - description: alert interrupt
33 max8997,pmic-buck1-dvs-voltage:
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/Documentation/sound/
Dalsa-configuration.rst2 Advanced Linux Sound Architecture - Driver Configuration guide
38 ----------
47 limiting card index for auto-loading (1-8);
49 For auto-loading more than one card, specify this option
50 together with snd-card-X aliases.
63 Module snd-pcm-oss
64 ------------------
86 regarding opening the device. When this option is non-zero,
90 Module snd-rawmidi
91 ------------------
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/Documentation/networking/
Dethtool-netlink.rst27 wake-on-lan password) omitted.
37 number 1 but any non-zero value should be understood as "true" by recipient.
44 Attributes that need to be filled-in by device drivers and that are dumped to
98 representing bit values and mask of affected bits) and bit-by-bit (list of
101 Verbose (bit-by-bit) bitsets allow sending symbolic names for bits together
126 rounded up to a multiple of 32 bits. They consist of 32-bit words in host byte
141 Bit-by-bit form: nested (bitset) attribute contents:
143 +------------------------------------+--------+-----------------------------+
145 +------------------------------------+--------+-----------------------------+
147 +------------------------------------+--------+-----------------------------+
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