| /linux/Documentation/ABI/testing/ |
| H A D | debugfs-scmi-raw | 7 in little-endian binary format to have it sent to the configured
11 Each write to the entry causes one command request to be built
12 and sent while the replies are read back one message at time
22 in little-endian binary format to have it sent to the configured
29 Each write to the entry causes one command request to be built
30 and sent while the replies are read back one message at time
40 little-endian binary format to have it sent to the configured
45 Each write to the entry causes one command request to be built
46 and sent while the replies are read back one message at time
55 polling-mode; write a complete SCMI asynchronous command message
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| /linux/include/linux/dma/ |
| H A D | sprd-dma.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
15 * The Spreadtrum DMA controller supports channel 2-stage tansfer, that means
16 * we can request 2 dma channels, one for source channel, and another one for
17 * destination channel. Each channel is independent, and has its own
18 * configurations. Once the source channel's transaction is done, it will
19 * trigger the destination channel's transaction automatically by hardware
22 * To support 2-stage tansfer, we must configure the channel mode and trigger
27 * enum sprd_dma_chn_mode: define the DMA channel mode for 2-stage transfer
28 * @SPRD_DMA_CHN_MODE_NONE: No channel mode setting which means channel doesn't
29 * support the 2-stage transfer.
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| /linux/include/sound/sof/ |
| H A D | channel_map.h | 1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
16 * \brief Channel map, specifies transformation of one-to-many or many-to-one.
18 * In case of one-to-many specifies how the output channels are computed out of
19 * a single source channel,
20 * in case of many-to-one specifies how a single target channel is computed
23 * Channel index specifies position of the channel in the stream on the 'one'
29 * Channel mask describes which channels are taken into account on the "many"
30 * side. Bit[i] set to 1 means that i-th channel is used for computation
33 * Channel mask is followed by array of coefficients in Q2.30 format,
34 * one per each channel set in the mask (left to right, LS bit set in the
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| /linux/Documentation/trace/ |
| H A D | stm.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 protocol multiplexing data from multiple trace sources, each one of
10 which is assigned a unique pair of master and channel. While some of
14 master/channel combination from this pool.
17 sources can only be identified by master/channel combination, so in
20 master/channel pairs to the trace sources that it understands.
23 master 7 channel 15, while arbitrary user applications can use masters
34 associated with it, located in "stp-policy" subsystem directory in
40 $ ls /config/stp-policy/dummy_stm.my-policy/user
42 $ cat /config/stp-policy/dummy_stm.my-policy/user/masters
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| /linux/Documentation/driver-api/ |
| H A D | edac.rst | 5 ----------------------------------------
8 *sockets, *socket sets*, *banks*, *rows*, *chip-select rows*, *channels*,
35 * Channel
37 A memory controller channel, responsible to communicate with a group of
38 DIMMs. Each channel has its own independent control (command) and data
43 It is typically the highest hierarchy on a Fully-Buffered DIMM memory
48 just one memory stick when an error occurs, as the error correction code
49 is calculated using two DIMMs instead of one. Due to that, it is capable
52 * Single-channel
54 The data accessed by the memory controller is contained into one dimm
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|
| /linux/Documentation/iio/ |
| H A D | ad4030.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
16 * `AD4030-24 <https://www.analog.com/AD4030-24>`_
17 * `AD4032-24 <https://www.analog.com/AD4032-24>`_
18 * `AD4630-16 <https://www.analog.com/AD4630-16>`_
19 * `AD4630-24 <https://www.analog.com/AD4630-24>`_
20 * `AD4632-16 <https://www.analog.com/AD4632-16>`_
21 * `AD4632-24 <https://www.analog.com/AD4632-24>`_
26 Each "hardware" channel as described in the datasheet is split in 2 IIO
29 - One channel for the differential data
30 - One channel for the common byte.
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|
| /linux/Documentation/arch/arm/stm32/ |
| H A D | stm32-dma-mdma-chaining.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 STM32 DMA-MDMA chaining
9 ------------
11 This document describes the STM32 DMA-MDMA chaining feature. But before going
44 ----------
46 STM32 DMA-MDMA chaining feature relies on the strengths of STM32 DMA and
50 (when DMA data counter - DMA_SxNDTR - reaches 0), the memory pointers
53 process one memory area while the second memory area is being filled/used by
56 With STM32 MDMA linked-list mode, a single request initiates the data array
57 (collection of nodes) to be transferred until the linked-list pointer for the
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|
| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | vidioc-g-modulator.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_G_MODULATOR - VIDIOC_S_MODULATOR - Get or set modulator attributes
44 begin at index zero, incrementing by one until the driver returns
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.
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| /linux/sound/pci/ca0106/ |
| H A D | ca0106.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
12 * Removed noise from Center/LFE channel when in Analog mode.
50 * Implement support for Line-in capture on SB Live 24bit.
73 #define IPR_MIDI_RX_B 0x00020000 /* MIDI UART-B Receive buffer non-empty */
74 #define IPR_MIDI_TX_B 0x00010000 /* MIDI UART-B Transmit buffer empty */
87 #define IPR_MIDI_RX_A 0x00000004 /* MIDI UART-A Receive buffer non-empty */
88 #define IPR_MIDI_TX_A 0x00000002 /* MIDI UART-A Transmit buffer empty */
93 #define INTE_MIDI_RX_B 0x00020000 /* MIDI UART-B Receive buffer non-empty */
94 #define INTE_MIDI_TX_B 0x00010000 /* MIDI UART-B Transmit buffer empty */
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|
| /linux/drivers/net/wireless/quantenna/qtnfmac/ |
| H A D | qlink.h | 1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (c) 2015-2016 Quantenna Communications. All rights reserved. */
31 * enum qlink_msg_type - QLINK message types
49 * struct qlink_msg_header - common QLINK protocol message header
53 * @type: Message type, one of &enum qlink_msg_type.
65 * enum qlink_hw_capab - device capabilities.
68 * @QLINK_HW_CAPAB_STA_INACT_TIMEOUT: device implements a logic to kick-out
91 * enum qlink_driver_capab - host driver capabilities.
108 * struct qlink_intf_info - information on virtual interface.
112 * @if_type: Mode of interface operation, one of &enum qlink_iface_type
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|
| /linux/Documentation/arch/mips/ |
| H A D | ingenic-tcu.rst | 1 .. SPDX-License-Identifier: GPL-2.0
7 The Timer/Counter Unit (TCU) in Ingenic JZ47xx SoCs is a multi-function
11 - JZ4725B, JZ4750, JZ4755 only have six TCU channels. The other SoCs all
14 - JZ4725B introduced a separate channel, called Operating System Timer
15 (OST). It is a 32-bit programmable timer. On JZ4760B and above, it is
16 64-bit.
18 - Each one of the TCU channels has its own clock, which can be reparented to three
21 - The watchdog and OST hardware blocks also feature a TCSR register with the same
23 - The TCU registers used to gate/ungate can also gate/ungate the watchdog and
26 - Each TCU channel works in one of two modes:
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|
| /linux/sound/firewire/dice/ |
| H A D | dice-interface.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
11 * block read transactions with at least quadlet-aligned offset and length.
12 * Writes are not allowed except where noted; quadlet-sized registers must be
15 * All values are in big endian. The DICE firmware runs on a little-endian CPU
16 * and just byte-swaps _all_ quadlets on the bus, so values without endianness
17 * (e.g. strings) get scrambled and must be byte-swapped again by the driver.
32 * size values are measured in quadlets. Read-only.
50 * Stores the full 64-bit address (node ID and offset in the node's address
60 * A bitmask with asynchronous events; read-only. When any event(s) happen,
74 /* Other bits may be used for device-specific events. */
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| /linux/Documentation/devicetree/bindings/iio/adc/ |
| H A D | xilinx-xadc.txt | 8 frontends for the DRP interface exist. One that is only available on the ZYNQ
9 family as a hardmacro in the SoC portion of the ZYNQ. The other one is available
22 - compatible: Should be one of
23 * "xlnx,zynq-xadc-1.00.a": When using the ZYNQ device
25 * "xlnx,axi-xadc-1.00.a": When using the axi-xadc pcore to
27 * "xlnx,system-management-wiz-1.3": When using the
30 - reg: Address and length of the register set for the device
31 - interrupts: Interrupt for the XADC control interface.
32 - clocks: When using the ZYNQ this must be the ZYNQ PCAP clock,
33 when using the axi-xadc or the axi-system-management-wizard this must be
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|
| /linux/Documentation/devicetree/bindings/display/ |
| H A D | dsi-controller.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/dsi-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linusw@kernel.org>
24 can control one to four virtual channels to one panel. Each virtual
25 channel should have a node "panel" for their virtual channel with their
26 reg-property set to the virtual channel number, usually there is just
27 one virtual channel, number 0.
33 clock-master:
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|
| /linux/Documentation/devicetree/bindings/input/ |
| H A D | azoteq,iqs7222.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jeff LaBundy <jeff@labundy.com>
21 - azoteq,iqs7222a
22 - azoteq,iqs7222b
23 - azoteq,iqs7222c
24 - azoteq,iqs7222d
29 irq-gpios:
32 Specifies the GPIO connected to the device's active-low RDY output.
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|
| /linux/Documentation/networking/ |
| H A D | ppp_generic.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 PPP Generic Driver and Channel Interface
12 The generic PPP driver in linux-2.4 provides an implementation of the
26 the services of PPP ``channels``. A PPP channel encapsulates a
27 mechanism for transporting PPP frames from one machine to another. A
28 PPP channel implementation can be arbitrarily complex internally but
31 handle ioctl requests. Currently there are PPP channel
36 natural and straightforward way, by allowing more than one channel to
42 PPP channel API
43 ---------------
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|
| /linux/Documentation/fb/ |
| H A D | viafb.rst | 6 --------
15 ---------------
34 ----------------------
47 - 640x480 (default)
48 - 720x480
49 - 800x600
50 - 1024x768
53 - 8, 16, 32 (default:32)
56 - 60, 75, 85, 100, 120 (default:60)
59 - 0 : expansion (default)
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| /linux/drivers/net/wireless/ath/ath5k/ |
| H A D | phy.c | 2 * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
3 * Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com>
4 * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
5 * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org>
42 * Here we handle the low-level functions related to baseband
48 * - Channel setting/switching
50 * - Automatic Gain Control (AGC) calibration
52 * - Noise Floor calibration
54 * - I/Q imbalance calibration (QAM correction)
56 * - Calibration due to thermal changes (gain_F)
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|
| /linux/sound/pci/emu10k1/ |
| H A D | p16v.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (c) by James Courtier-Dutton <James@superbug.demon.co.uk>
11 /* Audigy2 P16V pointer-offset register set, accessed through the PTR2 and DATA2 registers …
20 /* One list entry: 4 bytes for DMA address,
22 * One list entry is 8 bytes long.
23 * One list entry for each period in the buffer.
25 #define PLAYBACK_LIST_SIZE 0x01 /* Size of list in bytes << 16. E.g. 8 periods -> 0x00380000 */
41 /* [0:1] Capture input 0 channel select. 0 = Capture output 0.
45 * [3:2] Capture input 1 channel select. 0 = Capture output 0.
49 * [5:4] Capture input 2 channel select. 0 = Capture output 0.
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|
| /linux/Documentation/input/devices/ |
| H A D | rotary-encoder.rst | 2 rotary-encoder - a generic driver for GPIO connected devices
8 --------
11 peripherals with two wires. The outputs are phase-shifted by 90 degrees
16 a stable state with both outputs high (half-period mode) and some have
17 a stable state in all steps (quarter-period mode).
23 Channel A ____| |_____| |_____| |____
28 Channel B |_____| |_____| |_____| |__
33 |<-------->|
34 one step
36 |<-->|
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|
| /linux/Documentation/devicetree/bindings/spi/ |
| H A D | sprd,spi-adi.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/spi/sprd,spi-adi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Orson Zhai <orsonzhai@gmail.com>
11 - Baolin Wang <baolin.wang7@gmail.com>
12 - Chunyan Zhang <zhang.lyra@gmail.com>
15 ADI is the abbreviation of Anolog-Digital interface, which is used to access
24 which means we can just link one analog chip address to one hardware channel,
25 then users can access the mapped analog chip address by this hardware channel
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|
| /linux/Documentation/arch/s390/ |
| H A D | vfio-ccw.rst | 2 vfio-ccw: the basic infrastructure
6 ------------
9 Linux/s390. Motivation for vfio-ccw is to passthrough subchannels to a
13 I/O access method, which is so called Channel I/O. It has its own access
16 - Channel programs run asynchronously on a separate (co)processor.
17 - The channel subsystem will access any memory designated by the caller
18 in the channel program directly, i.e. there is no iommu involved.
24 regions to pass the channel programs from the mdev to its parent device
31 - A good start to know Channel I/O in general:
33 - s390 architecture:
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| /linux/include/linux/iio/ |
| H A D | consumer.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
19 * struct iio_channel - everything needed for a consumer to use a channel
20 * @indio_dev: Device on which the channel exists.
21 * @channel: Full description of the channel.
22 * @data: Data about the channel used by consumer.
26 const struct iio_chan_spec *channel; member
31 * iio_channel_get() - get description of all that is needed to access channel.
36 * @consumer_channel: Unique name to identify the channel on the consumer
44 * iio_channel_release() - release channels obtained via iio_channel_get
45 * @chan: The channel to be released.
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|
| /linux/Documentation/devicetree/bindings/dma/ |
| H A D | k3dma.txt | 6 - compatible: Must be one of
7 - "hisilicon,k3-dma-1.0"
8 - "hisilicon,hisi-pcm-asp-dma-1.0"
9 - reg: Should contain DMA registers location and length.
10 - interrupts: Should contain one interrupt shared by all channel
11 - #dma-cells: see dma.txt, should be 1, para number
12 - dma-channels: physical channels supported
13 - dma-requests: virtual channels supported, each virtual channel
15 - clocks: clock required
21 compatible = "hisilicon,k3-dma-1.0";
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|
| /linux/drivers/net/wireless/intel/iwlwifi/fw/api/ |
| H A D | scan.h | 1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
3 * Copyright (C) 2012-2014, 2018-2025 Intel Corporation
4 * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5 * Copyright (C) 2016-2017 Intel Deutschland GmbH
13 * enum iwl_scan_subcmd_ids - scan commands
33 * struct iwl_ssid_ie - directed scan network information element
37 * each channel may select different ssids from among the 20 entries.
78 * struct iwl_scan_offload_blocklist - SCAN_OFFLOAD_BLACKLIST_S
81 * @client_bitmap: clients ignore this entry - enum scan_framework_client
112 * struct iwl_scan_offload_profile - SCAN_OFFLOAD_PROFILE_S
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|