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/Documentation/devicetree/bindings/pinctrl/
Dpincfg-node.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/pincfg-node.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linus.walleij@linaro.org>
21 bias-disable:
25 bias-high-impedance:
27 description: high impedance mode ("third-state", "floating")
29 bias-bus-hold:
33 bias-pull-up:
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Dcypress,cy8c95x0.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Patrick Rudolph <patrick.rudolph@9elements.com>
14 Pin function configuration is performed on a per-pin basis.
19 - cypress,cy8c9520
20 - cypress,cy8c9540
21 - cypress,cy8c9560
26 gpio-controller: true
28 '#gpio-cells':
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Dpinctrl-max77620.txt6 Please refer file <devicetree/bindings/pinctrl/pinctrl-bindings.txt>
11 --------------------------
14 - pinctrl-names: A pinctrl state named per <pinctrl-bindings.txt>.
15 - pinctrl[0...n]: Properties to contain the phandle for pinctrl states per
16 <pinctrl-bindings.txt>.
19 sub-node have following properties:
22 ------------------
23 - pins: List of pins. Valid values of pins properties are:
27 -------------------
29 <pinctrl-bindings.txt>. Absence of properties will leave the configuration
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Dqcom,pmic-gpio.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/qcom,pmic-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Bjorn Andersson <bjorn.andersson@linaro.org>
19 - enum:
20 - qcom,pm2250-gpio
21 - qcom,pm660-gpio
22 - qcom,pm660l-gpio
23 - qcom,pm6125-gpio
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Dnxp,s32g2-siul2-pinctrl.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/pinctrl/nxp,s32g2-siul2-pinctrl.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Ghennadi Procopciuc <Ghennadi.Procopciuc@oss.nxp.com>
12 - Chester Lin <chester62515@gmail.com>
24 MSCR102-MSCR111, MSCR123-MSCR143, IMCR84-IMCR118 and IMCR398-IMCR429.
29 - nxp,s32g2-siul2-pinctrl
34 - MSCR (Multiplexed Signal Configuration Register)
36 or a function output pin depends on the selected signal source.
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Dfsl,imx-pinctrl.txt10 Please refer to pinctrl-bindings.txt in this directory for details of the
18 such as pull-up, open drain, drive strength, etc.
21 - compatible: "fsl,<soc>-iomuxc"
22 Please refer to each fsl,<soc>-pinctrl.txt binding doc for supported SoCs.
25 - fsl,pins: each entry consists of 6 integers and represents the mux and config
28 imx*-pinfunc.h under device tree source folder. The last integer CONFIG is
29 the pad setting value like pull-up on this pin. And that's why fsl,pins entry
41 Please refer to each fsl,<soc>-pinctrl,txt binding doc for SoC specific part
45 Some requirements for using fsl,imx-pinctrl binding:
62 non-removable;
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/Documentation/userspace-api/ioctl/
Dcdrom.rst5 - Edward A. Falk <efalk@google.com>
10 the CDROM layer. These are by-and-large implemented (as of Linux 2.6)
23 CDROMSTOP Stop the cdrom drive
24 CDROMSTART Start the cdrom drive
33 CDROMEJECT_SW enable(1)/disable(0) auto-ejecting
34 CDROMMULTISESSION Obtain the start-of-last-session
40 CDROMRESET hard-reset the drive
41 CDROMVOLREAD Get the drive's volume setting
47 CDROMPLAYBLK scsi-cd only, (struct cdrom_blk)
49 CDROMGETSPINDOWN return 4-bit spindown value
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/Documentation/devicetree/bindings/power/reset/
Dgpio-restart.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/power/reset/gpio-restart.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sebastian Reichel <sre@kernel.org>
13 Drive a GPIO line that can be used to restart the system from a restart handler.
17 'open-source' is not found, the GPIO line will be driven in the inactive state. Otherwise its
22 This will also cause an inactive->active edge condition, triggering positive edge triggered
23 reset. After a delay specified by active-delay, the GPIO is set to inactive, thus causing an
24 active->inactive edge, triggering negative edge triggered reset. After a delay specified by
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/Documentation/cdrom/
Dcdrom-standard.rst2 A Linux CD-ROM standard
14 Linux is probably the Unix-like operating system that supports
18 - The large list of hardware devices available for the many platforms
19 that Linux now supports (i.e., i386-PCs, Sparc Suns, etc.)
20 - The open design of the operating system, such that anybody can write a
22 - There is plenty of source code around as examples of how to write a driver.
29 This divergence of behavior has been very significant for CD-ROM
30 devices; the way a particular drive reacts to a `standard` *ioctl()*
32 their drivers totally inconsistent, the writers of Linux CD-ROM
35 maintain uniform behavior across all the Linux CD-ROM drivers.
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/Documentation/devicetree/bindings/sound/
Dcs35l36.txt5 - compatible : "cirrus,cs35l36"
7 - reg : the I2C address of the device for I2C
9 - VA-supply, VP-supply : power supplies for the device,
13 - cirrus,boost-ctl-millivolt : Boost Voltage Value. Configures the boost
18 - cirrus,boost-peak-milliamp : Boost-converter peak current limit in mA.
24 - cirrus,boost-ind-nanohenry : Inductor estimation LBST reference value.
32 - cirrus,multi-amp-mode : Boolean to determine if there are more than
33 one amplifier in the system. If more than one it is best to Hi-Z the ASP
36 - cirrus,boost-ctl-select : Boost converter control source selection.
37 Selects the source of the BST_CTL target VBST voltage for the boost
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/Documentation/admin-guide/laptops/
Ddisk-shock-protection.rst7 Last modified: 2008-10-03
19 --------
21 ATA/ATAPI-7 specifies the IDLE IMMEDIATE command with unload feature.
22 Issuing this command should cause the drive to switch to idle mode and
26 the internal hard drive and park its heads on the ramp when critical
37 ----------------
42 -EOPNOTSUPP if the device does not support the unload feature.
44 of the respective drive off the platter and block all I/O operations
49 -EOVERFLOW, but heads will be parked anyway and the timeout will be
55 immediately by specifying a timeout of 0. Values below -2 are rejected
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/Documentation/devicetree/bindings/iio/imu/
Dst,lsm6dsx.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STM 6-axis (acc + gyro) IMU Mems sensors
10 - Lorenzo Bianconi <lorenzo@kernel.org>
18 - enum:
19 - st,lsm6ds3
20 - st,lsm6ds3h
21 - st,lsm6dsl
22 - st,lsm6dsm
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/Documentation/driver-api/gpio/
Ddriver.rst26 between 0 and n-1, n being the number of GPIOs managed by the chip.
29 example if a system uses a memory-mapped set of I/O-registers where 32 GPIO
30 lines are handled by one bit per line in a 32-bit register, it makes sense to
44 So for example one platform could use global numbers 32-159 for GPIOs, with a
46 global numbers 0..63 with one set of GPIO controllers, 64-79 with another type
47 of GPIO controller, and on one particular board 80-95 with an FPGA. The legacy
49 2000-2063 to identify GPIO lines in a bank of I2C GPIO expanders.
60 - methods to establish GPIO line direction
61 - methods used to access GPIO line values
62 - method to set electrical configuration for a given GPIO line
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Dconsumer.rst21 - Simple compile coverage with e.g. COMPILE_TEST - it does not matter that
25 - Truly optional GPIOLIB support - where the driver does not really make use
26 of the GPIOs on certain compile-time configurations for certain systems, but
27 will use it under other compile-time configurations. In this case the
33 some open coding of error handling should be expected when you do this.
35 All the functions that work with the descriptor-based GPIO interface are
45 With the descriptor-based interface, GPIOs are identified with an opaque,
46 non-forgeable handler that must be obtained through a call to one of the
62 see Documentation/driver-api/gpio/board.rst
73 to be electrically used with open drain.
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/Documentation/devicetree/bindings/watchdog/
Daspeed,ast2400-wdt.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/watchdog/aspeed,ast2400-wdt.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andrew Jeffery <andrew@codeconstruct.com.au>
15 - aspeed,ast2400-wdt
16 - aspeed,ast2500-wdt
17 - aspeed,ast2600-wdt
25 The clock used to drive the watchdog counter. From the AST2500 no source
29 aspeed,reset-type:
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/Documentation/admin-guide/gpio/
Dgpio-virtuser.rst1 .. SPDX-License-Identifier: GPL-2.0-only
8 consumer devices can be instantiated from device-tree or over configfs.
10 A virtual consumer uses the driver-facing GPIO APIs and allows to cover it with
11 automated tests driven by user-space. The GPIOs are requested using
15 -----------------------
17 The gpio-consumer module registers a configfs subsystem called
18 ``'gpio-virtuser'``. For details of the configfs filesystem, please refer to
25 **Group:** ``/config/gpio-virtuser``
27 This is the top directory of the gpio-consumer configfs tree.
29 **Group:** ``/config/gpio-consumer/example-name``
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/Documentation/devicetree/bindings/iio/addac/
Dadi,ad74115.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Cosmin Tanislav <cosmin.tanislav@analog.com>
13 The AD74115H is a single-channel software configurable input/output
17 chip solution with an SPI interface. The device features a 16-bit ADC and a
18 14-bit DAC.
25 - adi,ad74115h
30 spi-max-frequency:
33 spi-cpol: true
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/Documentation/devicetree/bindings/mfd/
Das3722.txt4 -------------------
5 - compatible: Must be "ams,as3722".
6 - reg: I2C device address.
7 - interrupt-controller: AS3722 has internal interrupt controller which takes the
8 interrupt request from internal sub-blocks like RTC, regulators, GPIOs as well
10 - #interrupt-cells: Should be set to 2 for IRQ number and flags.
11 The first cell is the IRQ number. IRQ numbers for different interrupt source
12 of AS3722 are defined at dt-bindings/mfd/as3722.h
14 interrupts.txt, using dt-bindings/irq.
17 --------------------
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/Documentation/userspace-api/media/v4l/
Dvidioc-g-edid.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_EDID - VIDIOC_S_EDID - VIDIOC_SUBDEV_G_EDID - VIDIOC_SUBDEV_S_EDID - Get or set the EDID o…
38 File descriptor returned by :c:func:`open()`.
48 with subdevice nodes (/dev/v4l-subdevX) or with video nodes
97 this will drive the hotplug pin low and/or block the source from reading
105 .. flat-table:: struct v4l2_edid
106 :header-rows: 0
107 :stub-columns: 0
110 * - __u32
111 - ``pad``
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Ddev-encoder.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
6 Memory-to-Memory Stateful Video Encoder Interface
12 further post-processing by the client.
34 5. Single-planar API (see :ref:`planar-apis`) and applicable structures may be
35 used interchangeably with multi-planar API, unless specified otherwise,
47 Refer to :ref:`decoder-glossary`.
52 .. kernel-render:: DOT
65 qi -> Initialization [ label = "open()" ];
67 Initialization -> Encoding [ label = "Both queues streaming" ];
69 Encoding -> Drain [ label = "V4L2_ENC_CMD_STOP" ];
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/Documentation/usb/
Dmass-storage.rst9 appearing to the host as a disk or a CD-ROM drive. It supports
12 to read-only, and gadget can indicate that it is removable and/or
13 CD-ROM (the latter implies read-only access).
15 Its requirements are modest; only a bulk-in and a bulk-out endpoint
17 Support is included for full-speed, high-speed and SuperSpeed
20 Note that the driver is slightly non-portable in that it assumes
21 a single memory/DMA buffer will be usable for bulk-in and bulk-out
38 - file=filename[,filename...]
53 simulating CD-ROM, block size of the device if the backing file is
56 - removable=b[,b...]
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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
10 5 = /dev/zero Null byte source
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
50 0 = /dev/fd0 Controller 0, drive 0, autodetect
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/Documentation/networking/dsa/
Dsja1105.rst8 The NXP SJA1105 is a family of 10 SPI-managed automotive switches:
10 - SJA1105E: First generation, no TTEthernet
11 - SJA1105T: First generation, TTEthernet
12 - SJA1105P: Second generation, no TTEthernet, no SGMII
13 - SJA1105Q: Second generation, TTEthernet, no SGMII
14 - SJA1105R: Second generation, no TTEthernet, SGMII
15 - SJA1105S: Second generation, TTEthernet, SGMII
16 - SJA1110A: Third generation, TTEthernet, SGMII, integrated 100base-T1 and
17 100base-TX PHYs
18 - SJA1110B: Third generation, TTEthernet, SGMII, 100base-T1, 100base-TX
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/Documentation/arch/powerpc/
Dcxlflash.rst12 purpose co-processors which can read or write an application's
40 - Any flash device (LUN) can be configured to be accessed as a
43 - Any flash device (LUN) can be configured to be accessed from
47 or physical LUN access) or access to a kernel/AFU-mediated
67 +-------------------------------+
71 +-------------------------------+
75 +-------------------------------+
78 +-------------------------------+
99 the sizes of all the virtual LUNs, along with the meta-data associated
124 a high-level overview of each supported service (IOCTL) is provided
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/Documentation/process/
Dmaintainer-pgp-guide.rst12 Linux Foundation. Please read that document for more in-depth discussion
15 .. _`Protecting Code Integrity`: https://github.com/lfit/itpol/blob/master/protecting-code-integrit…
22 communication channels between developers via PGP-signed email exchange.
24 The Linux kernel source code is available in two main formats:
26 - Distributed source repositories (git)
27 - Periodic release snapshots (tarballs)
35 - git repositories provide PGP signatures on all tags
36 - tarballs provide detached PGP signatures with all downloads
41 -------------------------------------------
64 ----------------------
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