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/Documentation/userspace-api/media/v4l/
Dvidioc-s-hw-freq-seek.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_S_HW_FREQ_SEEK - Perform a hardware frequency seek
37 zero out the ``reserved`` array of a struct
41 The ``rangelow`` and ``rangehigh`` fields can be set to a non-zero value
58 If this ioctl is called from a non-blocking filehandle, then ``EAGAIN``
65 .. flat-table:: struct v4l2_hw_freq_seek
66 :header-rows: 0
67 :stub-columns: 0
70 * - __u32
71 - ``tuner``
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Dfunc-poll.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _func-poll:
13 v4l2-poll - Wait for some event on a file descriptor
18 .. code-block:: c
47 is non-zero). Capture devices set the ``POLLIN`` and ``POLLRDNORM``
50 zero, on failure it returns -1 and the ``errno`` variable is set
76 it waits until the driver is ready for a non-blocking
94 non-zero ``revents`` fields, or zero if the call timed out. On error -1
/Documentation/arch/arm64/
Dtagged-pointers.rst20 --------------------------------------
25 (Documentation/arch/arm64/tagged-address-abi.rst).
29 - pointer arguments to system calls, including pointers in structures
32 - the stack pointer (sp), e.g. when interpreting it to deliver a
35 - the frame pointer (x29) and frame records, e.g. when interpreting
38 Using non-zero address tags in any of these locations when the
44 passing non-zero address tags to the kernel via system calls is
45 forbidden, and using a non-zero address tag for sp is strongly
48 Programs maintaining a frame pointer and frame records that use non-zero
54 ---------------
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Dtagged-address-abi.rst14 ---------------
17 userspace (EL0) to perform memory accesses through 64-bit pointers with
18 a non-zero top byte. This document describes the relaxation of the
23 -----------------------------
27 non-zero top-byte that references an address in the user process address
30 - ``mmap()`` syscall where either:
32 - flags have the ``MAP_ANONYMOUS`` bit set or
33 - the file descriptor refers to a regular file (including those
34 returned by ``memfd_create()``) or ``/dev/zero``
36 - ``brk()`` syscall (i.e. the heap area between the initial location of
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/Documentation/ABI/stable/
Dsysfs-bus-fsl-mc1 What: /sys/bus/fsl-mc/rescan
5 Description: Writing a non-zero value to this attribute will
6 force a rescan of fsl-mc bus in the system and
7 synchronize the objects under fsl-mc bus and the
11 What: /sys/bus/fsl-mc/autorescan
15 Description: Writing a zero value to this attribute will
17 of the fsl-mc bus is performed. A non-zero value
/Documentation/ABI/testing/
Dsysfs-bus-peci6 Writing a non-zero value to this attribute will
10 What: /sys/bus/peci/devices/<controller_id>-<device_addr>/remove
15 Writing a non-zero value to this attribute will
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
73 their documentation see `sysfs-class-led-trigger-*`.
Dsysfs-driver-st9 with the #define DEBUG set to a non-zero value (this is the
Dsysfs-class-mtd4 Contact: linux-mtd@lists.infradead.org
12 Contact: linux-mtd@lists.infradead.org
22 Contact: linux-mtd@lists.infradead.org
24 These directories provide the corresponding read-only device
30 Contact: linux-mtd@lists.infradead.org
34 read-write device so <minor> will be even.
39 Contact: linux-mtd@lists.infradead.org
42 to the read-only variant of the MTD device (in
48 Contact: linux-mtd@lists.infradead.org
51 zero, this is the eraseblock size for the entire device.
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/Documentation/userspace-api/media/mediactl/
Drequest-func-poll.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
4 .. _request-func-poll:
13 request-poll - Wait for some event on a file descriptor
18 .. code-block:: c
45 is non-zero). Request file descriptor set the ``POLLPRI`` flag in ``revents``
47 a value of zero, on failure it returns -1 and the ``errno`` variable is
57 structures which have non-zero ``revents`` fields, or zero if the call
58 timed out. On error -1 is returned, and the ``errno`` variable is set
Dmedia-ioc-enum-entities.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 MEDIA_IOC_ENUM_ENTITIES - Enumerate entities and their properties
40 .. _media-ent-id-flag-next:
47 Entity IDs can be non-contiguous. Applications must *not* try to
55 .. flat-table:: struct media_entity_desc
56 :header-rows: 0
57 :stub-columns: 0
60 * - __u32
61 - ``id``
62 -
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/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>
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
35 - arm,l220-cache
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/Documentation/translations/it_IT/RCU/
Dtorture.rst1 .. SPDX-License-Identifier: GPL-2.0
3 .. include:: ../disclaimer-ita.rst
19 Documentation/admin-guide/kernel-parameters.txt.
26 …rcu-torture:--- Start of test: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_no_idle_…
27 …rcu-torture: rtc: (null) ver: 155441 tfle: 0 rta: 155441 rtaf: 8884 rtf: 155440 rtmbe: 0…
28 rcu-torture: Reader Pipe: 727860534 34213 0 0 0 0 0 0 0 0 0
29 rcu-torture: Reader Batch: 727877838 17003 0 0 0 0 0 0 0 0 0
30 …rcu-torture: Free-Block Circulation: 155440 155440 155440 155440 155440 155440 155440 155440 1554…
31 …rcu-torture:--- End of test: SUCCESS: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_n…
36 printk() usa KERN_ALERT, dunque i messaggi dovrebbero essere ben visibili. ;-)
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/Documentation/userspace-api/media/cec/
Dcec-func-poll.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _cec-func-poll:
13 cec-poll - Wait for some event on a file descriptor
18 .. code-block:: c
45 is non-zero). CEC devices set the ``POLLIN`` and ``POLLRDNORM`` flags in
50 a value of zero, on failure it returns -1 and the ``errno`` variable is
59 non-zero ``revents`` fields, or zero if the call timed out. On error -1
Dcec-ioc-receive.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
14 CEC_RECEIVE, CEC_TRANSMIT - Receive or transmit a CEC message
42 If the file descriptor is in non-blocking mode and there are no received
43 messages pending, then it will return -1 and set errno to the ``EAGAIN``
45 is non-zero and no message arrived within ``timeout`` milliseconds, then
46 it will return -1 and set errno to the ``ETIMEDOUT`` error code.
51 be 0, ``tx_status`` will be 0 and ``rx_status`` will be non-zero).
52 2. the transmit result of an earlier non-blocking transmit (the ``sequence``
53 field will be non-zero, ``tx_status`` will be non-zero and ``rx_status``
55 3. the reply to an earlier non-blocking transmit (the ``sequence`` field will
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/Documentation/devicetree/bindings/sound/
Dtdm-slot.txt6 dai-tdm-slot-num : Number of slots in use.
7 dai-tdm-slot-width : Width in bits for each slot.
8 dai-tdm-slot-tx-mask : Transmit direction slot mask, optional
9 dai-tdm-slot-rx-mask : Receive direction slot mask, optional
12 dai-tdm-slot-num = <2>;
13 dai-tdm-slot-width = <8>;
14 dai-tdm-slot-tx-mask = <0 1>;
15 dai-tdm-slot-rx-mask = <1 0>;
27 number presents bit-0 (LSB), second presents bit-1, etc. Any non zero
29 does not do anything, if either mask is set non zero value.
Dnuvoton,nau8325.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Seven Lee <WTLI@nuvoton.com>
13 - $ref: dai-common.yaml#
22 nuvoton,vref-impedance-ohms:
25 Tie-Off selection options. Due to the high impedance of the VREF
26 pin, it is important to use a low-leakage capacitor.
30 nuvoton,dac-vref-microvolt:
39 nuvoton,alc-enable:
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/Documentation/translations/it_IT/process/
Ddeprecated.rst1 .. SPDX-License-Identifier: GPL-2.0
3 .. include:: ../disclaimer-ita.rst
18 le tempistiche, non è sempre possibile fare questo tipo di conversione tutta
26 ------------
28 `non produce più alcun avviso durante la compilazione
33 interfaccia come 'vecchia', questa non è una soluzione completa. L'interfaccia
38 ----------------
50 <https://lore.kernel.org/lkml/CA+55aFy6jNLsywVYdGp83AMrXBo_P-pkjkphPGrO=82SPKCpLQ@mail.gmail.com/>`…
52 <https://lore.kernel.org/lkml/CAHk-=whDHsbK3HTOpTF=ue_o04onRwTEaK_ZoJp_fjbqq4+=Jw@mail.gmail.com/>`_
65 ----------------------------------------------------
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/Documentation/arch/arm/
Dkernel_user_helpers.rst2 Kernel-provided User Helpers
43 --------------------
77 -------------
114 - Valid only if __kuser_helper_version >= 1 (from kernel version 2.6.12).
117 -------------
134 r0 = success code (zero or non-zero)
144 Return zero if `*ptr` was changed or non-zero if no exchange happened.
167 - This routine already includes memory barriers as needed.
169 - Valid only if __kuser_helper_version >= 2 (from kernel version 2.6.12).
172 --------------------
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/Documentation/devicetree/bindings/regulator/
Drohm,bd71815-regulator.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/regulator/rohm,bd71815-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
14 see Documentation/devicetree/bindings/mfd/rohm,bd71815-pmic.yaml.
16 The regulator controller is represented as a sub-node of the PMIC node
33 regulator-name:
37 "^((ldo|buck)[1-5]|ldolpsr|ldodvref)$":
44 regulator-name:
[all …]
/Documentation/RCU/
Dtorture.rst1 .. SPDX-License-Identifier: GPL-2.0
19 Documentation/admin-guide/kernel-parameters.txt.
26 …rcu-torture:--- Start of test: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_no_idle_…
27 …rcu-torture: rtc: (null) ver: 155441 tfle: 0 rta: 155441 rtaf: 8884 rtf: 155440 rtmbe: 0…
28 rcu-torture: Reader Pipe: 727860534 34213 0 0 0 0 0 0 0 0 0
29 rcu-torture: Reader Batch: 727877838 17003 0 0 0 0 0 0 0 0 0
30 …rcu-torture: Free-Block Circulation: 155440 155440 155440 155440 155440 155440 155440 155440 1554…
31 …rcu-torture:--- End of test: SUCCESS: nreaders=16 nfakewriters=4 stat_interval=30 verbose=0 test_n…
37 be evident. ;-)
51 * "tfle": If non-zero, indicates that the "torture freelist"
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/Documentation/devicetree/bindings/hwmon/
Dntc-thermistor.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 ---
3 $id: http://devicetree.org/schemas/hwmon/ntc-thermistor.yaml#
4 $schema: http://devicetree.org/meta-schemas/core.yaml#
9 - Linus Walleij <linus.walleij@linaro.org>
13 vary in resistance in an often non-linear way in relation to temperature.
16 temperature is non-linear, software drivers most often need to use a look
20 pull-up resistor or/and a pull-down resistor and a fixed voltage like this:
22 + e.g. 5V = pull-up voltage (puv)
24 +-+
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/Documentation/devicetree/bindings/ptp/
Dtimestamper.txt3 This binding supports non-PHY devices that snoop the MII bus and
9 Non-PHY MII time stamping drivers typically talk to the control
20 compatible = "ines,ptp-ctrl";
26 ethernet-phy@1 {
34 ethernet-phy@2 {
41 appear on time stamp channel 0 (zero), and those from phy@2 appear on
/Documentation/driver-api/
Dxillybus.rst10 - Introduction
11 -- Background
12 -- Xillybus Overview
14 - Usage
15 -- User interface
16 -- Synchronization
17 -- Seekable pipes
19 - Internals
20 -- Source code organization
21 -- Pipe attributes
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/Documentation/scsi/
Dst.rst1 .. SPDX-License-Identifier: GPL-2.0
23 flexible method and applicable to single-user workstations. However,
32 drive performs auto-detection of the tape format well (like some
33 QIC-drives). The result is that any tape can be read, writing can be
37 does not perform auto-detection well enough and there is a single
40 or not :-).
57 between formats in multi-tape operations (the explicitly overridden
72 limits). Both the auto-rewind (minor equals device number) and
73 non-rewind devices (minor is 128 + device number) are implemented.
93 returning zero bytes for two consecutive reads.
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