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/Documentation/devicetree/bindings/arm/bcm/
Dbcm2835.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Eric Anholt <eric@anholt.net>
11 - Stefan Wahren <wahrenst@gmx.net>
18 - description: BCM2711 based Boards
20 - enum:
21 - raspberrypi,400
22 - raspberrypi,4-compute-module
23 - raspberrypi,4-model-b
[all …]
/Documentation/iio/
Diio_dmabuf_api.rst1 .. SPDX-License-Identifier: GPL-2.0
4 High-speed DMABUF interface for IIO
11 file-based interface, with read() and write() access calls through the
14 It additionally supports a DMABUF based interface, where the userspace
20 zero-copy fashion, for instance between IIO and the USB stack.
22 The userspace application can also memory-map the DMABUF objects, and
25 kernel and userspace. This is particularly useful for high-speed devices
27 It does however increase the userspace-kernelspace synchronization
40 IIO buffer. Returns zero on success, and a negative errno value on
45 from the IIO buffer. Returns zero on success, and a negative errno
/Documentation/devicetree/bindings/mtd/
Dfsmc-nand.txt5 - compatible : "st,spear600-fsmc-nand", "stericsson,fsmc-nand"
6 - reg : Address range of the mtd chip
7 - reg-names: Should contain the reg names "fsmc_regs", "nand_data", "nand_addr" and "nand_cmd"
10 - bank-width : Width (in bytes) of the device. If not present, the width
12 - nand-skip-bbtscan: Indicates the BBT scanning should be skipped
13 - timings: array of 6 bytes for NAND timings. The meanings of these bytes
16 are valid. Zero means one clockcycle, 15 means 16 clock
20 kept in Hi-Z (tristate) after the start of a write access.
21 Only valid for write transactions. Zero means zero cycles,
24 when writing) after the command deassertation. Zero means
[all …]
/Documentation/filesystems/ext4/
Dverity.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ------------
6 ext4 supports fs-verity, which is a filesystem feature that provides
7 Merkle tree based hashing for individual readonly files. Most of
8 fs-verity is common to all filesystems that support it; see
10 fs-verity documentation. However, the on-disk layout of the verity
11 metadata is filesystem-specific. On ext4, the verity metadata is
14 - Zero-padding to the next 65536-byte boundary. This padding need not
15 actually be allocated on-disk, i.e. it may be a hole.
17 - The Merkle tree, as documented in
[all …]
/Documentation/fb/
Dapi.rst9 ---------------
12 with frame buffer devices. In-kernel APIs between device drivers and the frame
22 ---------------
36 - FB_CAP_FOURCC
38 The driver supports the four character code (FOURCC) based format setting API.
44 --------------------
46 Pixels are stored in memory in hardware-dependent formats. Applications need
58 - FB_TYPE_PACKED_PIXELS
67 - FB_TYPE_PLANES
75 - FB_TYPE_INTERLEAVED_PLANES
[all …]
/Documentation/devicetree/bindings/mips/ingenic/
Ddevices.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Ingenic XBurst based Platforms
10 - 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
21 - description: Qi Hardware Ben NanoNote
23 - const: qi,lb60
24 - const: ingenic,jz4740
26 - description: YLM RetroMini RS-90
28 - const: ylm,rs90
[all …]
/Documentation/devicetree/bindings/soc/fsl/cpm_qe/
Dcpm.txt10 - compatible : "fsl,cpm1", "fsl,cpm2", or "fsl,qe".
11 - reg : A 48-byte region beginning with CPCR.
15 #address-cells = <1>;
16 #size-cells = <1>;
17 #interrupt-cells = <2>;
18 compatible = "fsl,mpc8272-cpm", "fsl,cpm2";
24 - fsl,cpm-command : This value is ORed with the opcode and command flag
27 - fsl,cpm-brg : Indicates which baud rate generator the device
29 should be dynamically allocated. If zero, the
32 - reg : Unless otherwise specified, the first resource represents the
[all …]
/Documentation/admin-guide/media/
Dtechnisat.rst1 .. SPDX-License-Identifier: GPL-2.0
13 -----------------------------
19 .. code-block:: none
21 lspci -vvv for a PCI device (lsusb -vvv for an USB device) will show you for example:
29 -------------------
37 (except ``Simple tuner support`` for ATSC 3rd generation only -> see case 9 please).
41 - Main module part:
50 - Frontend / Tuner / Demodulator module part:
55 - SkyStar DVB-S Revision 2.3:
57 #) => ``Zarlink VP310/MT312/ZL10313 based``
[all …]
/Documentation/admin-guide/mm/damon/
Dreclaim.rst1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based Reclamation
7 DAMON-based Reclamation (DAMON_RECLAIM) is a static kernel module that aimed to
9 It doesn't aim to replace the LRU-list based page_granularity reclamation, but
15 On general memory over-committed systems, proactively reclaiming cold pages
20 Free Pages Reporting [3]_ based memory over-commit virtualization systems are
24 guests could be not so memory-frugal, mainly because some kernel subsystems and
25 user-space applications are designed to use as much memory as available. Then,
54 -------
60 no real monitoring and reclamation due to the watermarks-based activation
[all …]
/Documentation/devicetree/bindings/soc/fsl/cpm_qe/cpm/
Di2c.txt6 - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"
7 - reg : On CPM2 devices, the second resource doesn't specify the I2C
10 - #address-cells : Should be one. The cell is the i2c device address with
11 the r/w bit set to zero.
12 - #size-cells : Should be zero.
13 - clock-frequency : Can be used to set the i2c clock frequency. If
17 - linux,i2c-index : Can be used to hard code an i2c bus number. By default,
19 - linux,i2c-class : Can be used to override the i2c class. The class is used
25 Example, based on mpc823:
28 compatible = "fsl,mpc823-i2c",
[all …]
/Documentation/devicetree/bindings/timer/
Djcore,pit.txt1 J-Core Programmable Interval Timer and Clocksource
5 - compatible: Must be "jcore,pit".
7 - reg: Memory region(s) for timer/clocksource registers. For SMP,
9 zero-based hardware cpu number.
11 - interrupts: An interrupt to assign for the timer. The actual pit
/Documentation/devicetree/bindings/interrupt-controller/
Djcore,aic.txt1 J-Core Advanced Interrupt Controller
5 - compatible: Should be "jcore,aic1" for the (obsolete) first-generation aic
9 - reg: Memory region(s) for configuration. For SMP, there should be one
10 region per cpu, indexed by the sequential, zero-based hardware cpu
13 - interrupt-controller: Identifies the node as an interrupt controller
15 - #interrupt-cells: Specifies the number of cells needed to encode an
21 aic: interrupt-controller@200 {
24 interrupt-controller;
25 #interrupt-cells = <1>;
/Documentation/virt/kvm/devices/
Dmpic.rst1 .. SPDX-License-Identifier: GPL-2.0
9 - KVM_DEV_TYPE_FSL_MPIC_20 Freescale MPIC v2.0
10 - KVM_DEV_TYPE_FSL_MPIC_42 Freescale MPIC v4.2
20 KVM_DEV_MPIC_BASE_ADDR (rw, 64-bit)
22 naturally aligned. A value of zero disables the mapping.
23 Reset value is zero.
25 KVM_DEV_MPIC_GRP_REGISTER (rw, 32-bit)
28 must be 4-byte aligned.
33 KVM_DEV_MPIC_GRP_IRQ_ACTIVE (rw, 32-bit)
37 For edge-triggered interrupts: Writing 1 is considered an activating
[all …]
/Documentation/usb/
Dfunctionfs.rst24 interface numbers starting from zero). The FunctionFS changes
28 For more information about FunctionFS descriptors see :doc:`functionfs-desc`
51 $ mkdir /dev/ffs-mtp && mount -t functionfs mtp /dev/ffs-mtp
52 $ ( cd /dev/ffs-mtp && mtp-daemon ) &
53 $ mkdir /dev/ffs-hid && mount -t functionfs hid /dev/ffs-hid
54 $ ( cd /dev/ffs-hid && hid-daemon ) &
56 On kernel level the gadget checks ffs_data->dev_name to identify
64 parameter's value is just a one-element list, then the behaviour
78 FunctionFS additionally supports a DMABUF based interface, where the
84 zero-copy fashion, for instance between IIO and the USB stack.
[all …]
/Documentation/bpf/
Dmaps.rst8 hash, array, bloom filter and radix-tree. Several of the map types exist to
9 support specific BPF helpers that perform actions based on the map contents. The
11 `man-pages`_ for `bpf-helpers(7)`_.
15 More details of the BPF syscall are available in `ebpf-syscall`_ and in the
16 `man-pages`_ for `bpf(2)`_.
41 .. code-block:: c
55 Returns a process-local file descriptor on success, or negative error in case of
59 .. note:: Valid characters for ``map_name`` are ``A-Z``, ``a-z``, ``0-9``,
64 Lookup key in a given map using ``attr->map_fd``, ``attr->key``,
65 ``attr->value``. Returns zero and stores found elem into ``attr->value`` on
[all …]
/Documentation/userspace-api/media/dvb/
Ddmx-reqbufs.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 DMX_REQBUFS - Initiate Memory Mapping and/or DMA buffer I/O
36 This ioctl is used to initiate a memory mapped or DMABUF based demux I/O.
54 …unt`` field. The ``count`` can be smaller than the number requested, even zero, when the driver ru…
64 A ``count`` value of zero frees all buffers, after aborting or finishing
70 On success 0 is returned, on error -1 and the ``errno`` variable is set
72 :ref:`Generic Error Codes <gen-errors>` chapter.
/Documentation/ABI/testing/
Dsysfs-class-led9 just be turned on for non-zero brightness settings.
23 Documentation/leds/leds-class-multicolor.rst.
30 Writing non-zero to this file while trigger is active changes the
67 Set the trigger for this LED. A trigger is a kernel based source
73 their documentation see `sysfs-class-led-trigger-*`.
/Documentation/mm/
Dovercommit-accounting.rst17 of zero pages.
54 The overcommit is based on the following rules
57 | SHARED or READ-only - 0 cost (the file is the map not swap)
58 | PRIVATE WRITABLE - size of mapping per instance
60 For an anonymous or ``/dev/zero`` map
61 | SHARED - size of mapping
62 | PRIVATE READ-only - 0 cost (but of little use)
63 | PRIVATE WRITABLE - size of mapping per instance
/Documentation/devicetree/bindings/mips/cavium/
Dcib.txt4 - compatible: "cavium,octeon-7130-cib"
8 - interrupt-controller: This is an interrupt controller.
10 - reg: Two elements consisting of the addresses of the RAW and EN
13 - cavium,max-bits: The index (zero based) of the highest numbered bit
16 - interrupts: The CIU line to which the CIB block is connected.
18 - #interrupt-cells: Must be <2>. The first cell is the bit within the
24 interrupt-controller@107000000e000 {
25 compatible = "cavium,octeon-7130-cib";
28 cavium,max-bits = <23>;
30 interrupt-controller;
[all …]
/Documentation/userspace-api/media/v4l/
Dvidioc-enum-framesizes.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_ENUM_FRAMESIZES - Enumerate frame sizes
47 - **Discrete:** The function returns success if the given index value
48 (zero-based) is valid. The application should increase the index by
54 - **Step-wise:** The function returns success if the given index value
55 is zero and ``EINVAL`` for any other index value. The
60 - **Continuous:** This is a special case of the step-wise type above.
61 The function returns success if the given index value is zero and
67 When the application calls the function with index zero, it must check
88 application should zero out all members except for the *IN* fields.
[all …]
Dvidioc-enum-frameintervals.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_ENUM_FRAMEINTERVALS - Enumerate frame intervals
46 - **Discrete:** The function returns success if the given index value
47 (zero-based) is valid. The application should increase the index by
53 - **Step-wise:** The function returns success if the given index value
54 is zero and ``EINVAL`` for any other index value. The
59 - **Continuous:** This is a special case of the step-wise type above.
60 The function returns success if the given index value is zero and
66 When the application calls the function with index zero, it must check
98 application should zero out all members except for the *IN* fields.
[all …]
/Documentation/driver-api/early-userspace/
Dbuffer-format.rst7 Last revision: 2002-01-13
17 The initramfs buffer format is based around the "newc" or "crc" CPIO
29 ALGN(n) means padding with null bytes to an n-byte boundary
44 formats); arbitrary amounts zero bytes (for padding) can be added
47 The cpio "TRAILER!!!" entry (cpio end-of-archive) is optional, but is
72 otherwise zero
78 The c_filesize should be zero for any file which is not a regular file
81 The c_chksum field contains a simple 32-bit unsigned sum of all the
87 If the filename is "TRAILER!!!" this is actually an end-of-archive
88 marker; the c_filesize for an end-of-archive marker must be zero.
[all …]
/Documentation/devicetree/bindings/cache/
Dl2c2x0.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
14 PL220/PL310 and variants) based level 2 cache controller. All these various
16 models (Note 1). Some of the properties that are just prefixed "cache-*" are
22 cache controllers as found in e.g. Cortex-A15/A7/A57/A53. These
28 - $ref: /schemas/cache-controller.yaml#
33 - enum:
34 - arm,pl310-cache
[all …]
/Documentation/watchdog/
Dhpwdt.rst5 for iLO based ProLiant Servers
21 watchdog-test.c. Simply compile the C file and kick it off. If the system
35 zero disables the pretimeout NMI.
43 before calling panic. (-1) disables the watchdog. When value
51 Documentation/watchdog/watchdog-api.rst and Documentation/driver-api/ipmi.rst
55 non-zero values will be rounded, possibly to zero. Users should verify
66 - Documentation/admin-guide/kdump/kdump.rst
67 - Documentation/admin-guide/kernel-parameters.txt (panic=)
68 - Your Linux Distribution specific documentation.
74 --
/Documentation/ABI/stable/
Dsysfs-transport-srp1 What: /sys/class/srp_remote_ports/port-<h>:<n>/delete
4 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
8 What: /sys/class/srp_remote_ports/port-<h>:<n>/dev_loss_tmo
11 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
14 Zero means immediate removal. Setting this attribute to "off"
17 What: /sys/class/srp_remote_ports/port-<h>:<n>/fast_io_fail_tmo
20 Contact: linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org
22 layer error has been observed before failing I/O. Zero means
26 What: /sys/class/srp_remote_ports/port-<h>:<n>/port_id
29 Contact: linux-scsi@vger.kernel.org
[all …]

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