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/linux/Documentation/ABI/testing/
H A Dsysfs-class-devlink2 Date: May 2020
7 denoted as ... above, is of the form <supplier>--<consumer>
12 Date: May 2020
21 - 'consumer unbind'
22 - 'supplier unbind'
23 - 'never'
32 when as long as the supplier and consumer devices themselves
36 Date: May 2020
42 Date: May 2020
54 '1' Affects runtime power management
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H A Dsysfs-bus-dax2 Date: October, 2020
11 Date: October, 2020
16 device. Specified in the format <start>-<end>.
21 Date: October, 2020
44 Date: October, 2020
50 an existing device, the new size can be written to this as
64 KernelVersion: v5.1
67 (RO) The target-node attribute is the Linux numa-node that a
68 device-dax instance may create when it is online. Prior to
74 What: $(readlink -f /sys/bus/dax/devices/daxX.Y)/../dax_region/available_size
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H A Dsysfs-bus-thunderbolt22 boot attribute is set to 1.
29 de-authorization of devices. Value of 1 means user can
30 de-authorize PCIe tunnel by writing 0 to authorized
38 for DMA protection. Value of 1 means IOMMU is used 0 means
78 0 The device will be de-authorized (only supported if
79 deauthorization attribute under domain contains 1)
80 1 The device will be authorized and connected
87 0 The device will be de-authorized (only supported if
88 deauthorization attribute under domain contains 1)
89 1 The 32 byte hex string is added to the device NVM and
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H A Dsysfs-class-rtrs-server1 What: /sys/class/rtrs-server
2 Date: Feb 2020
8 What: /sys/class/rtrs-server/<session-name>/paths/
9 Date: Feb 2020
13 a directory entry named as <source address>@<destination address> is created
16 What: /sys/class/rtrs-server/<session-name>/paths/<src@dst>/disconnect
17 Date: Feb 2020
20 Description: When "1" is written to the file, the RTRS session is being disconnected.
21 Operations is non-blocking and returns control immediately to the caller.
23 What: /sys/class/rtrs-server/<session-name>/paths/<src@dst>/hca_name
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H A Dsysfs-bus-dfl-devices-n3000-nios2 Date: Oct 2020
5 Description: Read-only. Returns the FEC mode of the 25G links of the
14 Date: Oct 2020
17 Description: Read-only. Returns the enumeration value of the working mode of
22 - "0": Reset
23 - "1": 4x10G
24 - "2": 4x25G
25 - "3": 2x25G
26 - "4": 2x25G+2x10G
27 - "5": 1x25G
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H A Dsysfs-bus-event_source-devices-hv_24x72 Date: September 2020
3 Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
4 Description: Read-only. Attribute group to describe the magic bits
6 (See ABI/testing/sysfs-bus-event_source-devices-format).
12 chip = "config:16-31"
13 core = "config:16-31"
14 domain = "config:0-3"
15 lpar = "config:0-15"
16 offset = "config:32-63"
17 vcpu = "config:16-31"
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H A Dsysfs-driver-w1_therm2 Date: May 2020
7 (typical -55 degC to 125 degC), if not values will be trimmed
8 to device min/max capabilities. Values are integer as they are
11 master level, refer to Documentation/w1/w1-generic.rst for
18 Date: May 2020
34 Date: May 2020
40 * '1': device externally powered
41 * '-xx': xx is kernel error when reading power status
48 Date: May 2020
55 values after power-on. Read or write are :
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H A Dsysfs-bus-vdpa2 Date: March 2020
6 to a driver after the creation. It initially contains 1, which
14 Date: March 2020
24 Date: March 2020
32 Date: March 2020
47 driver_override file (echo vhost-vdpa > driver_override) and may
54 not bind to any driver. This also allows devices to opt-out of
55 driver binding using a driver_override name such as "none".
H A Dsysfs-class-rnbd-client1 What: /sys/class/rnbd-client
2 Date: Feb 2020
5 Description: Provide information about RNBD-client.
6 All sysfs files that are not read-only provide the usage information on read:
10 # cat /sys/class/rnbd-client/ctl/map_device
18 What: /sys/class/rnbd-client/ctl/map_device
19 Date: Feb 2020
34 I.e. "clt_hostname-srv_hostname" could be a natural choice.
49 The single addr is treated as the destination.
70 directory and an entry in /sys/class/rnbd-client/ctl/devices
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H A Dsysfs-devices-platform-stratix10-rsu3 What: /sys/devices/platform/stratix10-rsu.0/current_image
10 What: /sys/devices/platform/stratix10-rsu.0/fail_image
17 What: /sys/devices/platform/stratix10-rsu.0/state
42 What: /sys/devices/platform/stratix10-rsu.0/version
63 What: /sys/devices/platform/stratix10-rsu.0/error_location
70 What: /sys/devices/platform/stratix10-rsu.0/error_details
77 What: /sys/devices/platform/stratix10-rsu.0/retry_counter
85 fail-over flow.
87 What: /sys/devices/platform/stratix10-rsu.0/reboot_image
95 What: /sys/devices/platform/stratix10-rsu.0/notify
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H A Dsysfs-bus-event_source-devices-hv_gpci2 Date: September 2020
3 Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
4 Description: Read-only. Attribute group to describe the magic bits
6 (See ABI/testing/sysfs-bus-event_source-devices-format).
12 counter_info_version = "config:16-23"
13 length = "config:24-31"
14 partition_id = "config:32-63"
15 request = "config:0-31"
16 sibling_part_id = "config:32-63"
17 hw_chip_id = "config:32-63"
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/linux/Documentation/ABI/stable/
H A Dsysfs-driver-firmware-zynqmp1 What: /sys/devices/platform/firmware\:zynqmp-firmware/ggs*
2 Date: March 2020
11 The register is reset during system or power-on
17 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
18 # echo <value> > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
22 # cat /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
23 # echo 0x1234ABCD > /sys/devices/platform/firmware\:zynqmp-firmware/ggs0
27 What: /sys/devices/platform/firmware\:zynqmp-firmware/pggs*
28 Date: March 2020
38 This register is only reset by the power-on reset
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H A Dsysfs-driver-mlxreg-io1 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/asic_health
6 0 - health failed, 2 - health OK, 3 - ASIC in booting state.
10 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld1_version
11 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld2_version
20 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/fan_dir
25 forward direction - relevant bit is set 0;
26 reversed direction - relevant bit is set 1.
30 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld3_version
39 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/jtag_enable
48 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/select_iio
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/linux/Documentation/networking/device_drivers/ethernet/marvell/
H A Docteontx2.rst1 .. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
7 Copyright (c) 2020 Marvell International Ltd.
12 - `Overview`_
13 - `Drivers`_
14 - `Basic packet flow`_
15 - `Devlink health reporters`_
16 - `Quality of service`_
17 - `RVU representors`_
24 PCI-compatible physical and virtual functions. Each functional block
32 - Network pool or buffer allocator (NPA)
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/linux/drivers/media/i2c/
H A Dmax9271.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017-2020 Jacopo Mondi
4 * Copyright (C) 2017-2020 Kieran Bingham
5 * Copyright (C) 2017-2020 Laurent Pinchart
6 * Copyright (C) 2017-2020 Niklas Söderlund
11 * chip. This is not a self-contained driver, as MAX9271 is usually embedded in
13 * components, such as uController units or ISPs/DSPs.
16 * functions exported from this library driver to maximize code re-use.
29 dev_dbg(&dev->client->dev, "%s(0x%02x)\n", __func__, reg); in max9271_read()
31 ret = i2c_smbus_read_byte_data(dev->client, reg); in max9271_read()
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/linux/Documentation/userspace-api/media/v4l/
H A Dcolorspaces-defs.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
12 :c:type:`v4l2_xfer_func`) to specify non-standard
15 non-standard Y'CbCr encodings and the fourth is the quantization
17 specify non-standard quantization methods. Most of the time only the
22 .. _hsv-colorspace:
24 On :ref:`HSV formats <hsv-formats>` the *Hue* is defined as the angle on
26 degrees, i.e. 0-360. When we map this angle value into 8 bits, there are
27 two basic ways to do it: Divide the angular value by 2 (0-179), or use the
28 whole range, 0-255, dividing the angular value by 1.41. The enum
38 .. flat-table:: V4L2 Colorspaces
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/linux/drivers/pwm/
H A Dpwm-visconti.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Toshiba Visconti pulse-width-modulation controller driver
5 * Copyright (c) 2020 - 2021 TOSHIBA CORPORATION
6 * Copyright (c) 2020 - 2021 Toshiba Electronic Devices & Storage Corporation
11 * - The fixed input clock is running at 1 MHz and is divided by either 1,
13 * - When the settings of the PWM are modified, the new values are shadowed
17 * - Disabling the hardware completes the currently running period and keeps
33 #define PIPGM_PWMC_CLK_MASK GENMASK(1, 0)
51 if (!state->enabled) { in visconti_pwm_apply()
52 writel(0, priv->base + PIPGM_PCSR(pwm->hwpwm)); in visconti_pwm_apply()
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/linux/arch/arm64/boot/dts/apple/
H A Dt8103-j293.dts1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
3 * Apple MacBook Pro (13-inch, M1, 2020)
5 * target-type: J293
10 /dts-v1/;
13 #include "t8103-jxxx.dtsi"
14 #include <dt-bindings/leds/common.h>
17 compatible = "apple,j293", "apple,t8103", "apple,arm-platform";
18 model = "Apple MacBook Pro (13-inch, M1, 2020)";
22 * blobs and other device-specific properties
28 led-controller {
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/linux/Documentation/ABI/obsolete/
H A Dsysfs-gpio7 As a Kconfig option, individual GPIO signals may be accessed from
13 GPIOs are identified as they are inside the kernel, using integers in
14 the range 0..INT_MAX. See Documentation/admin-guide/gpio for more information.
23 /direction ... r/w as: in, out (default low); write: high, low
24 /edge ... r/w as: none, falling, rising, both
25 /active_low ... r/w as: 0, 1
27 /base ... (r/o) same as N
29 /ngpio ... (r/o) number of GPIOs; numbered N to N + (ngpio - 1)
32 /direction ... r/w as: in, out (default low); write: high, low
39 This ABI is obsoleted by Documentation/ABI/testing/gpio-cdev and will be
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/linux/include/linux/can/
H A Dlength.h1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (C) 2020 Oliver Hartkopp <socketcan@hartkopp.net>
3 * Copyright (C) 2020 Marc Kleine-Budde <kernel@pengutronix.de>
4 * Copyright (C) 2020, 2023 Vincent Mailhol <mailhol.vincent@wanadoo.fr>
19 * ---------------------------------------------------------
20 * Start Of Frame (SOF) 1
23 * Remote Transmission Request (RTR) 1
25 * IDentifier Extension bit (IDE) 1
26 * FD Format indicator (FDF) 1
37 * ---------------------------------------------------------
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/linux/lib/
H A Ddevmem_is_allowed.c1 // SPDX-License-Identifier: GPL-2.0-only
7 * Copyright (C) 2020 Google, Inc.
18 * disallowing access to system RAM as well as device-exclusive MMIO regions.
26 return 1; in devmem_is_allowed()
/linux/Documentation/devicetree/bindings/media/i2c/
H A Ddongwoon,dw9768.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 # Copyright (c) 2020 MediaTek Inc.
4 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Dongchun Zhu <dongchun.zhu@mediatek.com>
13 description: |-
14 The Dongwoon DW9768 is a single 10-bit digital-to-analog (DAC) converter
16 a linear mode driver. The DAC is controlled via a 2-wire (I2C-compatible)
17 serial interface that operates at clock rates up to 1MHz. This chip
24 - dongwoon,dw9768 # for DW9768 VCM
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/linux/include/linux/dma/
H A Dqcom-gpi-dma.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2020, Linaro Limited
10 * enum spi_transfer_cmd - spi transfer commands
13 SPI_TX = 1,
19 * struct gpi_spi_config - spi config for peripheral
24 * @pack_en: process tx/rx buffers as packed
50 I2C_WRITE = 1,
55 * struct gpi_i2c_config - i2c config for peripheral
57 * @pack_enable: process tx/rx buffers as packed
67 * @muli-msg: is part of multi i2c r-w msgs
/linux/security/landlock/
H A Dtask.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Landlock - Ptrace and scope hooks
5 * Copyright © 2017-2020 Mickaël Salaün <mic@digikod.net>
6 * Copyright © 2019-2020 ANSSI
7 * Copyright © 2024-202
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/linux/Documentation/devicetree/bindings/misc/
H A Dolpc,xo1.75-ec.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 # Copyright (C) 2019,2020 Lubomir Rintel <lkundrak@v3.sk>
4 ---
5 $id: http://devicetree.org/schemas/misc/olpc,xo1.75-ec.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: OLPC XO-1.75 Embedded Controller
11 This binding describes the Embedded Controller acting as a SPI bus master
12 on a OLPC XO-1.75 laptop computer.
17 "ready-gpios" property of the SSP binding as documented in:
18 <Documentation/devicetree/bindings/spi/marvell,mmp2-ssp.yaml>.
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