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/Documentation/devicetree/bindings/powerpc/fsl/
Dsrio-rmu.txt5 node is composed of three types of sub-nodes ("fsl-srio-msg-unit",
6 "fsl-srio-dbell-unit" and "fsl-srio-port-write-unit").
10 - compatible
13 Definition: Must include "fsl,srio-rmu-vX.Y", "fsl,srio-rmu".
18 - reg
20 Value type: <prop-encoded-array>
22 length of the SRIO configuration registers for message units
23 and doorbell units.
25 - fsl,liodn
26 Usage: optional-but-recommended (for devices with PAMU)
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/Documentation/userspace-api/media/v4l/
Dmetafmt-generic.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
8 Generic line-based metadata formats
14 These generic line-based metadata formats define the memory layout of the data
17 .. _v4l2-meta-fmt-generic-8:
20 -----------------------
22 The V4L2_META_FMT_GENERIC_8 format is a plain 8-bit metadata format. This format
23 is used on CSI-2 for 8 bits per :term:`Data Unit`.
26 packed into one 16-bit Data Unit. Otherwise the 16 bits per pixel dataformat is
27 :ref:`V4L2_META_FMT_GENERIC_CSI2_16 <v4l2-meta-fmt-generic-csi2-16>`.
34 .. flat-table:: Sample 4x2 Metadata Frame
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Dvidioc-g-modulator.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator attributes
52 this is a write-only ioctl, it does not return the actual audio
67 .. flat-table:: struct v4l2_modulator
68 :header-rows: 0
69 :stub-columns: 0
72 * - __u32
73 - ``index``
74 - Identifies the modulator, set by the application.
75 * - __u8
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Dext-ctrls-image-source.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _image-source-controls:
9 The Image Source control class is intended for low-level control of
15 .. _image-source-control-id:
28 same sub-device.
59 non-sensitive.
64 .. flat-table:: struct v4l2_area
65 :header-rows: 0
66 :stub-columns: 0
69 * - __u32
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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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Dext-ctrls-codec-stateless.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _codec-stateless-controls:
18 .. _codec-stateless-control-id:
23 .. _v4l2-codec-stateless-h264:
43 .. flat-table:: struct v4l2_ctrl_h264_sps
44 :header-rows: 0
45 :stub-columns: 0
48 * - __u8
49 - ``profile_idc``
50 -
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Dvidioc-queryctrl.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_QUERYCTRL - VIDIOC_QUERY_EXT_CTRL - VIDIOC_QUERYMENU - Enumerate controls and menu control i…
42 of a struct :ref:`v4l2_queryctrl <v4l2-queryctrl>` and call the
60 driver returns the next supported non-compound control, or ``EINVAL`` if
72 :ref:`v4l2_queryctrl <v4l2-queryctrl>` since that structure is full.
80 fields of struct :ref:`v4l2_querymenu <v4l2-querymenu>` and call the
85 :ref:`v4l2_queryctrl <v4l2-queryctrl>` ``minimum`` to ``maximum``,
99 .. _v4l2-queryctrl:
103 .. flat-table:: struct v4l2_queryctrl
104 :header-rows: 0
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/Documentation/devicetree/bindings/soc/ti/
Dti,pruss.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 TI Programmable Real-Time Unit and Industrial Communication Subsystem
11 - Suman Anna <s-anna@ti.com>
15 The Programmable Real-Time Unit and Industrial Communication Subsystem
16 (PRU-ICSS a.k.a. PRUSS) is present on various TI SoCs such as AM335x, AM437x,
17 Keystone 66AK2G, OMAP-L138/DA850 etc. A PRUSS consists of dual 32-bit RISC
18 cores (Programmable Real-Time Units, or PRUs), shared RAM, data and
23 peripheral interfaces, fast real-time responses, or specialized data handling.
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/Documentation/devicetree/bindings/
Dwriting-bindings.rst1 .. SPDX-License-Identifier: GPL-2.0
11 Documentation/devicetree/bindings/submitting-patches.rst
17 - DO attempt to make bindings complete even if a driver doesn't support some
21 - DON'T refer to Linux or "device driver" in bindings. Bindings should be
24 - DO use node names matching the class of the device. Many standard names are
27 - DO check that the example matches the documentation especially after making
30 - DON'T create nodes just for the sake of instantiating drivers. Multi-function
34 - DON'T use 'syscon' alone without a specific compatible string. A 'syscon'
42 - DO make 'compatible' properties specific. DON'T use wildcards in compatible
47 - DO use a vendor prefix on device-specific property names. Consider if
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/Documentation/devicetree/bindings/mfd/
Dsamsung,s5m8767.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzk@kernel.org>
17 and current regulators, RTC, clock outputs and other sub-blocks.
21 const: samsung,s5m8767-pmic
39 s5m8767,pmic-buck2-dvs-voltage:
40 $ref: /schemas/types.yaml#/definitions/uint32-array
44 A set of 8 voltage values in micro-volt (uV) units for buck2 when
47 s5m8767,pmic-buck3-dvs-voltage:
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/Documentation/driver-api/media/
Dv4l2-subdev.rst1 .. SPDX-License-Identifier: GPL-2.0
3 V4L2 sub-devices
4 ----------------
6 Many drivers need to communicate with sub-devices. These devices can do all
8 encoding or decoding. For webcams common sub-devices are sensors and camera
12 driver with a consistent interface to these sub-devices the
13 :c:type:`v4l2_subdev` struct (v4l2-subdev.h) was created.
15 Each sub-device driver must have a :c:type:`v4l2_subdev` struct. This struct
16 can be stand-alone for simple sub-devices or it might be embedded in a larger
18 low-level device struct (e.g. ``i2c_client``) that contains the device data as
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/Documentation/devicetree/bindings/memory-controllers/ddr/
Djedec,lpddr-channel.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr-channel.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
16 - Julius Werner <jwerner@chromium.org>
21 - jedec,lpddr2-channel
22 - jedec,lpddr3-channel
23 - jedec,lpddr4-channel
24 - jedec,lpddr5-channel
26 io-width:
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/Documentation/devicetree/bindings/remoteproc/
Dti,pru-rproc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/remoteproc/ti,pru-rproc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Suman Anna <s-anna@ti.com>
13 Each Programmable Real-Time Unit and Industrial Communication Subsystem
14 (PRU-ICSS or PRUSS) has two 32-bit load/store RISC CPU cores called
15 Programmable Real-Time Units (PRUs), each represented by a node. Each PRU
17 use the Data RAMs present within the PRU-ICSS for code execution.
27 corresponding PRU-ICSS node. Each node can optionally be rendered inactive by
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/Documentation/filesystems/
Dzonefs.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ZoneFS - Zone filesystem for Zoned block devices
11 as a file. Unlike a regular POSIX-compliant file system with native zoned block
18 than to a full-featured POSIX file system. The goal of zonefs is to simplify
22 example of this approach is the implementation of LSM (log-structured merge)
31 -------------------
62 by sub-directories. This file structure is built entirely using zone information
63 provided by the device and so does not require any complex on-disk metadata
66 On-disk metadata
67 ----------------
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Ddax.rst6 ----------
12 For block devices that are memory-like, the page cache pages would be
19 -----
30 ------------------------------
32 When mounting the filesystem, use the ``-o dax`` option on the command line or
34 within the filesystem. It is equivalent to the ``-o dax=always`` behavior below.
38 ----------------------------
41 -------
43 1. There exists an in-kernel file access mode flag `S_DAX` that corresponds to
61 ``-o dax=inode`` means "follow `FS_XFLAG_DAX`" and is the default.
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Dfscrypt.rst2 Filesystem-level encryption (fscrypt)
11 Note: "fscrypt" in this document refers to the kernel-level portion,
14 covers the kernel-level portion. For command-line examples of how to
20 <https://source.android.com/security/encryption/file-based>`_, over
25 Unlike dm-crypt, fscrypt operates at the filesystem level rather than
28 filesystem. This is useful for multi-user systems where each user's
29 data-at-rest needs to be cryptographically isolated from the others.
34 directly into supported filesystems --- currently ext4, F2FS, UBIFS,
44 fscrypt does not support encrypting files in-place. Instead, it
54 ---------------
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/Documentation/core-api/
Dgenericirq.rst7 :Copyright: |copy| 2005-2010: Thomas Gleixner
8 :Copyright: |copy| 2005-2006: Ingo Molnar
29 __do_IRQ() super-handler, which is able to deal with every type of
36 - Level type
38 - Edge type
40 - Simple type
44 - Fast EOI type
46 In the SMP world of the __do_IRQ() super-handler another type was
49 - Per CPU type
51 This split implementation of high-level IRQ handlers allows us to
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/Documentation/arch/m68k/
Dkernel-options.rst9 Author: Roman.Hodek@informatik.uni-erlangen.de (Roman Hodek)
11 Update: jds@kom.auc.dk (Jes Sorensen) and faq@linux-m68k.org (Chris Lawrence)
58 ----------
76 /dev/ram: -> 0x0100 (initial ramdisk)
77 /dev/hda: -> 0x0300 (first IDE disk)
78 /dev/hdb: -> 0x0340 (second IDE disk)
79 /dev/sda: -> 0x0800 (first SCSI disk)
80 /dev/sdb: -> 0x0810 (second SCSI disk)
81 /dev/sdc: -> 0x0820 (third SCSI disk)
82 /dev/sdd: -> 0x0830 (forth SCSI disk)
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/Documentation/networking/device_drivers/hamradio/
Dz8530drv.rst1 .. SPDX-License-Identifier: GPL-2.0
5 SCC.C - Linux driver for Z8530 based HDLC cards for AX.25
14 1. ftp://ftp.ccac.rwth-aachen.de/pub/jr/z8530drv-utils_3.0-3.tar.gz
16 2. ftp://ftp.pspt.fi/pub/ham/linux/ax25/z8530drv-utils_3.0-3.tar.gz
41 AX.25-HOWTO on how to emulate a KISS TNC on network device drivers.
54 please read 'man insmod' that comes with module-init-tools.
64 of your rc.*-files. This has to be done BEFORE you can
92 - this is just a delimiter to make sccinit a bit simpler to
96 - the address of the data port A of this Z8530 (needed)
98 - the address of the control port A (needed)
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/Documentation/ABI/stable/
Dsysfs-block7 with 4KB physical sectors exposing 512-byte logical
18 internally allocate space in units that are bigger than
35 power-of-two and atomic_write_unit_max_bytes may also be
37 This parameter - along with atomic_write_unit_min_bytes
38 and atomic_write_unit_max_bytes - will not be larger than
50 atomic_write_unit_min. This value must be a power-of-two.
60 be a power-of-two. This value will not be larger than
72 power-of-two and at least the size as in
111 integrity metadata. Set if the device is T10 PI-capable.
119 E.g. T10-DIF-TYPE1-CRC.
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/Documentation/fpga/
Ddfl.rst7 - Enno Luebbers <enno.luebbers@intel.com>
8 - Xiao Guangrong <guangrong.xiao@linux.intel.com>
9 - Wu Hao <hao.wu@intel.com>
10 - Xu Yilun <yilun.xu@intel.com>
29 +----------+ +-->+----------+ +-->+----------+ +-->+----------+
32 +----------+ | | Feature | | | Feature | | | Feature |
33 | Next_DFH |--+ +----------+ | +----------+ | +----------+
34 +----------+ | Next_DFH |--+ | Next_DFH |--+ | Next_DFH |--> NULL
35 | ID | +----------+ +----------+ +----------+
36 +----------+ | ID | | ID | | ID |
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/Documentation/filesystems/iomap/
Ddesign.rst1 .. SPDX-License-Identifier: GPL-2.0
62 units (generally memory pages or blocks) and looks up space mappings on
78 1. Obtain a space mapping via ``->iomap_begin``
80 2. For each sub-unit of work...
89 4. Release the mapping via ``->iomap_end``, if necessary
105 -----------
127 device pre-shutdown hook from returning before other threads have
152 ----------------
158 .. code-block:: c
193 ``->iomap_end`` function must delete the reservation.
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/Documentation/admin-guide/
Dcgroup-v2.rst1 .. _cgroup-v2:
11 conventions of cgroup v2. It describes all userland-visible aspects
14 v1 is available under :ref:`Documentation/admin-guide/cgroup-v1/index.rst <cgroup-v1>`.
19 1-1. Terminology
20 1-2. What is cgroup?
22 2-1. Mounting
23 2-2. Organizing Processes and Threads
24 2-2-1. Processes
25 2-2-2. Threads
26 2-3. [Un]populated Notification
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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
32 their drivers totally inconsistent, the writers of Linux CD-ROM
35 maintain uniform behavior across all the Linux CD-ROM drivers.
38 all the different CD-ROM device drivers for Linux. This document also
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/Documentation/admin-guide/media/
Dimx.rst1 .. SPDX-License-Identifier: GPL-2.0
7 ------------
15 - Image DMA Controller (IDMAC)
16 - Camera Serial Interface (CSI)
17 - Image Converter (IC)
18 - Sensor Multi-FIFO Controller (SMFC)
19 - Image Rotator (IRT)
20 - Video De-Interlacing or Combining Block (VDIC)
26 re-ordering (for example UYVY to YUYV) within the same colorspace, and
27 packed <--> planar conversion. The IDMAC can also perform a simple
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