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/Documentation/devicetree/bindings/iio/filter/
Dadi,admv8818.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ADMV8818 Digitally Tunable, High-Pass and Low-Pass Filter
10 - Antoniu Miclaus <antoniu.miclaus@analog.com>
15 The device features four independently controlled high-pass
16 filters (HPFs) and four independently controlled low-pass filters
19 https://www.analog.com/en/products/admv8818.html
24 - adi,admv8818
29 spi-max-frequency:
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/Documentation/sound/cards/
Dcmipci.rst2 Brief Notes on C-Media 8338/8738/8768/8770 Driver
8 Front/Rear Multi-channel Playback
9 ---------------------------------
13 DACs, both streams are handled independently unlike the 4/6ch multi-
22 - The first DAC supports U8 and S16LE formats, while the second DAC
24 - The second DAC supports only two channel stereo.
51 control switch in the driver "Line-In As Rear", which you can change
52 via alsamixer or somewhat else. When this switch is on, line-in jack
60 4/6 Multi-Channel Playback
61 --------------------------
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/Documentation/devicetree/bindings/pinctrl/
Dqcom,pmic-mpp.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/qcom,pmic-mpp.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm PMIC Multi-Purpose Pin (MPP) block
10 - Bjorn Andersson <bjorn.andersson@linaro.org>
19 - items:
20 - enum:
21 - qcom,pm8019-mpp
22 - qcom,pm8226-mpp
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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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/Documentation/hwmon/
Dltc4282.rst1 .. SPDX-License-Identifier: GPL-2.0-only
8 * Analog Devices LTC4282
12 Addresses scanned: - I2C 0x40 - 0x5A (7-bit)
13 Addresses scanned: - I2C 0x80 - 0xB4 with a step of 2 (8-bit)
17 https://www.analog.com/media/en/technical-documentation/data-sheets/ltc4282.pdf
19 Author: Nuno Sá <nuno.sa@analog.com>
25 from a live backplane. Using one or more external N-channel pass transistors,
28 power, energy and fault status. The device features analog foldback current
31 parallel MOSFETs or support a 2-stage start-up that first charges the load
32 capacitance followed by enabling a low on-resistance path to the load. The
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Dpmbus-core.rst9 power-management protocol with a fully defined command language that facilitates
11 protocol is implemented over the industry-standard SMBus serial interface and
12 enables programming, control, and real-time monitoring of compliant power
14 communication between devices based on both analog and digital technologies, and
18 promoted by the PMBus Implementers Forum (PMBus-IF), comprising 30+ adopters
22 commands, and manufacturers can add as many non-standard commands as they like.
23 Also, different PMBUs devices act differently if non-supported commands are
43 PMBus device capabilities auto-detection
46 For generic PMBus devices, code in pmbus.c attempts to auto-detect all supported
47 PMBus commands. Auto-detection is somewhat limited, since there are simply too
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/Documentation/sound/hd-audio/
Dnotes.rst2 More Notes on HD-Audio Driver
11 HD-audio is the new standard on-board audio component on modern PCs
12 after AC97. Although Linux has been supporting HD-audio since long
15 This document explains the brief trouble-shooting and debugging
16 methods for the HD-audio hardware.
18 The HD-audio component consists of two parts: the controller chip and
19 the codec chips on the HD-audio bus. Linux provides a single driver
20 for all controllers, snd-hda-intel. Although the driver name contains
21 a word of a well-known hardware vendor, it's not specific to it but for
22 all controller chips by other companies. Since the HD-audio
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/Documentation/sound/designs/
Dtimestamping.rst7 - Trigger_tstamp is the system time snapshot taken when the .trigger
11 estimate with a delay. In the latter two cases, the low-level driver
17 - tstamp is the current system timestamp updated during the last
19 The difference (tstamp - trigger_tstamp) defines the elapsed time.
29 - ``avail`` reports how much can be written in the ring buffer
30 - ``delay`` reports the time it will take to hear a new sample after all
43 ascii-art, this could be represented as follows (for the playback
47 --------------------------------------------------------------> time
50 analog link dma app FullBuffer
53 |< codec delay >|<--hw delay-->|<queued samples>|<---avail->|
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/Documentation/sound/soc/
Ddapm.rst11 management frameworks and, as such, can easily co-exist with them.
32 The graph for the STM32MP1-DK1 sound card is shown in picture:
34 .. kernel-figure:: dapm-graph.svg
75 Mixes several analog signals into a single analog signal.
77 An analog switch that outputs only one of many inputs.
81 Analog to Digital Converter
83 Digital to Analog Converter
85 An analog switch
139 (Widgets are defined in include/sound/soc-dapm.h)
142 There are convenience macros defined in soc-dapm.h that can be used to quickly
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/Documentation/iio/
Dadxl380.rst1 .. SPDX-License-Identifier: GPL-2.0
7 This driver supports Analog Device's ADXL380/382 on SPI/I2C bus.
12 * `ADXL380 <https://www.analog.com/ADXL380>`_
13 * `ADXL382 <https://www.analog.com/ADXL382>`_
15 The ADXL380/ADXL382 is a low noise density, low power, 3-axis accelerometer with
37 +---------------------------------------------------+----------------------------------------------…
38 | 3-Axis Accelerometer related device files | Description …
39 +---------------------------------------------------+----------------------------------------------…
41 +---------------------------------------------------+----------------------------------------------…
42 | in_accel_filter_high_pass_3db_frequency | Low pass filter bandwidth. …
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/Documentation/userspace-api/media/mediactl/
Dmedia-types.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _media-controller-types:
10 .. _media-entity-functions:
11 .. _MEDIA-ENT-F-UNKNOWN:
12 .. _MEDIA-ENT-F-V4L2-SUBDEV-UNKNOWN:
13 .. _MEDIA-ENT-F-IO-V4L:
14 .. _MEDIA-ENT-F-IO-VBI:
15 .. _MEDIA-ENT-F-IO-SWRADIO:
16 .. _MEDIA-ENT-F-IO-DTV:
17 .. _MEDIA-ENT-F-DTV-DEMOD:
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/Documentation/userspace-api/media/v4l/
Ddev-sliced-vbi.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
11 lines of an analog video signal. During VBI no picture information is
17 :ref:`raw VBI interface <raw-vbi>`. The data is passed as short
28 Different file descriptors must be used to pass raw and sliced VBI data
51 .. _sliced-vbi-format-negotitation:
103 -----------------------------
115 .. flat-table::
116 :header-rows: 0
117 :stub-columns: 0
120 * - __u16
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Dvidioc-g-tuner.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_TUNER - VIDIOC_S_TUNER - Get or set tuner attributes
52 Since this is a write-only ioctl, it does not return the actually
68 .. flat-table:: struct v4l2_tuner
69 :header-rows: 0
70 :stub-columns: 0
72 * - __u32
73 - ``index``
74 - :cspan:`1` Identifies the tuner, set by the application.
75 * - __u8
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/Documentation/driver-api/media/
Dmaintainer-entry-profile.rst5 --------
8 capture, analog and digital TV streams, cameras, remote controllers, HDMI CEC
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
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/Documentation/fb/
Dmatroxfb.rst16 * Most important: boot logo :-)
31 pass to the kernel this command line: "video=matroxfb:vesa:0x1BB".
34 box) and matroxfb (for graphics mode). You should not compile-in vesafb
35 unless you have primary display on non-Matrox VBE2.0 device (see
43 -------------
58 -------------------------
73 ----------
86 Non-listed number can be achieved by more complicated command-line, for
93 XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel
97 Running another (accelerated) X-Server like XF86_SVGA works too. But (at least)
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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/driver-api/usb/
Dwriting_musb_glue_layer.rst15 Instead, these embedded UDC rely on the USB On-the-Go (OTG)
18 Dual-Role Controller (MUSB HDRC) found in the Mentor Graphics Inventra™
21 As a self-taught exercise I have written an MUSB glue layer for the
28 .. _musb-basics:
33 To get started on the topic, please read USB On-the-Go Basics (see
35 hardware level. A couple of wiki pages by Texas Instruments and Analog
46 ------------------------
47 | | <------- drivers/usb/gadget
48 | Linux USB Core Stack | <------- drivers/usb/host
49 | | <------- drivers/usb/core
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/Documentation/input/devices/
Djoystick-parport.rst3 .. _joystick-parport:
9 :Copyright: |copy| 1998-2000 Vojtech Pavlik <vojtech@ucw.cz>
10 :Copyright: |copy| 1998 Andree Borrmann <a.borrmann@tu-bs.de>
18 Any information in this file is provided as-is, without any guarantee that
36 Many console and 8-bit computer gamepads and joysticks are supported. The
40 ------------
59 for your pads, use either keyboard or joystick port, and make a pass-through
69 (pin 9) -----> Power
77 (pin 9) ----|>|-------+------> Power
79 (pin 8) ----|>|-------+
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/Documentation/admin-guide/media/
Dbttv.rst1 .. SPDX-License-Identifier: GPL-2.0
8 ----------------------
12 ./scripts/config -e PCI
13 ./scripts/config -m I2C
14 ./scripts/config -m INPUT
15 ./scripts/config -m MEDIA_SUPPORT
16 ./scripts/config -e MEDIA_PCI_SUPPORT
17 ./scripts/config -e MEDIA_ANALOG_TV_SUPPORT
18 ./scripts/config -e MEDIA_DIGITAL_TV_SUPPORT
19 ./scripts/config -e MEDIA_RADIO_SUPPORT
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/Documentation/spi/
Dspi-summary.rst5 02-Feb-2012
8 ------------
17 clocking modes through which data is exchanged; mode-0 and mode-3 are most
32 - SPI may be used for request/response style device protocols, as with
35 - It may also be used to stream data in either direction (half duplex),
38 - Some devices may use eight bit words. Others may use different word
39 lengths, such as streams of 12-bit or 20-bit digital samples.
41 - Words are usually sent with their most significant bit (MSB) first,
44 - Sometimes SPI is used to daisy-chain devices, like shift registers.
51 SPI is only one of the names used by such four-wire protocols, and
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/Documentation/admin-guide/
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
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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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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