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/linux/include/media/
H A Dv4l2-device.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
12 #include <media/media-device.h>
13 #include <media/v4l2-subdev.h>
14 #include <media/v4l2-dev.h>
19 * struct v4l2_device - main struct to for V4L2 device drivers
27 * @notify: notify operation called by some sub
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/linux/Documentation/usb/
H A Dgadget_configfs.rst50 http://www.spinics.net/lists/linux-usb/msg76388.html)
55 $ mount none $CONFIGFS_HOME -t configfs
60 -----------------------
104 ------------------------------
134 -------------------------
150 Each function provides its specific set of attributes, with either read-only
151 or read-write access. Where applicable they need to be written to as
153 Please refer to Documentation/ABI/testing/configfs-usb-gadget for more information.
156 ------------------------------------------------------
164 $ ln -s functions/<name>.<instance name> configs/<name>.<number>
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/linux/arch/arm64/boot/dts/renesas/
H A Dr8a779f0-spider-ethernet.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 * Device Tree Source for the Spider Ethernet sub-board
23 label = "ethernet-sub-board";
31 groups = "tsn0_mdio_b", "tsn0_link_b";
33 power-source = <1800>;
37 groups = "tsn1_mdio_b", "tsn1_link_b";
39 power-source = <1800>;
43 groups = "tsn2_mdio_b", "tsn2_link_b";
45 power-source = <1800>;
50 pinctrl-0 = <&tsn0_pins>, <&tsn1_pins>, <&tsn2_pins>;
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H A Dgray-hawk-single.dtsi1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
6 * Copyright (C) 2024-2025 Glider bv
11 * Because R-Car V4M has only 1 SSI, it cannot handle both Playback/Capture
28 #include <dt-bindings/gpio/gpio.h>
29 #include <dt-bindings/input/input.h>
30 #include <dt-bindings/leds/common.h>
31 #include <dt-bindings/media/video-interfaces.h>
35 compatible = "renesas,gray-hawk-single";
49 can_transceiver0: can-phy0 {
51 #phy-cells = <0>;
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H A Dhihope-rzg2-ex-lvds.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 * Device Tree Source for the RZ/G2[MN] HiHope sub board LVDS common parts
10 compatible = "pwm-backlight";
13 brightness-levels = <0 2 8 16 32 64 128 255>;
14 default-brightness-level = <6>;
23 lvds-connector-en-hog {
24 gpio-hog;
26 output-low;
27 line-name = "lvds-connector-en-gpio";
42 groups = "pwm0";
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/linux/fs/xfs/
H A Dxfs_drain.h1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2022-2023 Oracle. All Rights Reserved.
41 * higher level locking primitive guarding allocation groups.
43 * When there's a collision, cross-referencing between data structures (e.g.
53 * a work item and all the sub-items that the parent item creates before moving
55 * sub-items. Writer threads are permitted to queue multiple work items
57 * sub-items (such as RUIs) must bump the intent counter and maintain it until
58 * the sub-items can themselves bump the intent counter.
65 * The same principles apply to realtime groups because the rt metadata inode
/linux/Documentation/admin-guide/perf/
H A Dalibaba_pmu.rst2 Alibaba's T-Head SoC Uncore Performance Monitoring Unit (PMU)
5 The Yitian 710, custom-built by Alibaba Group's chip development business,
6 T-Head, implements uncore PMU for performance and functional debugging to
9 DDR Sub-System Driveway (DRW) PMU Driver
14 channel is split into two independent sub-channels. The DDR Sub-System Driveway
15 implements separate PMUs for each sub-channel to monitor various performance
20 sub-channels of the same channel in die 0. And the PMU device of die 1 is
23 Each sub-channel has 36 PMU counters in total, which is classified into
24 four groups:
26 - Group 0: PMU Cycle Counter. This group has one pair of counters
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/linux/Documentation/devicetree/bindings/pinctrl/
H A Dabilis,tb10x-iomux.txt5 -------------------
7 - compatible: should be "abilis,tb10x-iomux";
8 - reg: should contain the physical address and size of the pin controller's
13 --------------------
15 Functions are defined (and referenced) by sub-nodes of the pin controller.
16 Every sub-node defines exactly one function (implying a set of pins).
19 controller sub-nodes.
22 - abilis,function: should be set to the name of the function's pin group.
24 The following pin groups are available:
25 - GPIO ports: gpioa, gpiob, gpioc, gpiod, gpioe, gpiof, gpiog,
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H A Dberlin,pinctrl.txt1 * Pin-controller driver for the Marvell Berlin SoCs
4 controller register sets. Pin controller nodes should be a sub-node of
6 controlled are organized in groups, so no actual pin information is
9 A pin-controller node should contain subnodes representing the pin group
14 is called a 'function' in the pin-controller subsystem.
17 - compatible: should be one of:
18 "marvell,berlin2-soc-pinctrl",
19 "marvell,berlin2-system-pinctrl",
20 "marvell,berlin2cd-soc-pinctrl",
21 "marvell,berlin2cd-system-pinctrl",
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H A Dbrcm,ns2-pinmux.txt8 - compatible:
9 Must be "brcm,ns2-pinmux"
11 - reg:
15 Properties in sub nodes:
17 - function:
20 - groups:
21 The list of groups to select with a given function
23 - pins:
26 The generic properties bias-disable, bias-pull-down, bias-pull-up,
27 drive-strength, slew-rate, input-enable, input-disable are supported
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H A Dpinmux-node.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/pinmux-node.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linus.walleij@linaro.org>
30 groups = "u0rxtx", "u0rtscts";
36 groups = "spi0pins";
50 For cases like this, the pin controller driver may use pinctrl-pin-array helper
55 #pinctrl-cells = <2>;
58 pinctrl-pin-array = <
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H A Dcanaan,k210-fpioa.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/canaan,k210-fpioa.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Damien Le Moal <dlemoal@kernel.org>
16 a per-pin basis.
20 const: canaan,k210-fpioa
29 - description: Controller reference clock source
30 - description: APB interface clock source
32 clock-names:
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/linux/scripts/lib/kdoc/
H A Dkdoc_re.py2 # SPDX-License-Identifier: GPL-2.0
8 Those help caching regular expressions and do matching for kernel-doc.
22 regular expressions and define sub at class init time.
30 Adds a new regex or re-use it from the cache.
92 def sub(self, sub, string, count=0):
94 Alias to re.sub
97 return self.regex.sub(su
95 sub(self, sub, string, count=0) global() argument
229 sub(self, regex, sub, line, count=0) global() argument
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/linux/tools/perf/pmu-events/
H A Dmetric.py1 # SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
13 def ToPerfJson(self) -> str:
17 def ToPython(self) -> str:
25 def Equals(self, other) -> bool:
29 def Substitute(self, name: str, expression: 'Expression') -> 'Expression':
32 def __str__(self) -> str:
35 def __or__(self, other: Union[int, float, 'Expression']) -> 'Operator':
38 def __ror__(self, other: Union[int, float, 'Expression']) -> 'Operator':
41 def __xor__(self, other: Union[int, float, 'Expression']) -> 'Operator':
44 def __and__(self, other: Union[int, float, 'Expression']) -> 'Operator':
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/linux/Documentation/netlink/
H A Dnetlink-raw.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/netlink-raw.yaml#
5 $schema: https://json-schema.org/draft-07/schema
11 pattern: ^[0-9a-z-]+$
12 name-cap:
14 pattern: ^[0-9a-zA-Z-]+$
18 len-or-define:
20 pattern: ^[0-9A-Za-z_-]+( - 1)?$
27 required: [ name, doc, attribute-sets, operations ]
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H A Dgenetlink.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/genetlink-legacy.yaml#
5 $schema: https://json-schema.org/draft-07/schema
11 pattern: ^[0-9a-z-]+$
15 len-or-define:
17 pattern: ^[0-9A-Za-z_-]+( - 1)?$
19 len-or-limit:
20 # literal int, const name, or limit based on fixed-width type
21 # e.g. u8-min, u16-max, etc.
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/linux/Documentation/netlink/specs/
H A Dnlctrl.yaml1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
2 ---
4 protocol: genetlink-legacy
5 uapi-header: linux/genetlink.h
8 genetlink meta-family that exposes information about all genetlink
12 -
13 name: op-flags
15 enum-name:
17 - admin-perm
18 - cmd-cap-do
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/linux/Documentation/devicetree/bindings/pci/
H A Dsnps,dw-pcie-common.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pci/snps,dw-pcie-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jingoo Han <jingoohan1@gmail.com>
11 - Gustavo Pimentel <gustavo.pimentel@synopsys.com>
23 Interface - DBI. In accordance with the reference manual the register
24 configuration space belongs to the Configuration-Dependent Module (CDM)
25 and is split up into several sub-parts Standard PCIe configuration
26 space, Port Logic Registers (PL), Shadow Config-space Registers,
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/linux/include/target/iscsi/
H A Discsi_target_stat.h1 /* SPDX-License-Identifier: GPL-2.0 */
10 * For struct iscsi_tiqn->tiqn_wwn default groups
19 * For struct iscsi_session->se_sess default groups
39 /* iSCSI login failure types (sub oids) */
/linux/Documentation/arch/powerpc/
H A Dassociativity.rst9 are represented as being members of a sub-grouping domain. This performance
11 From the platform view, these groups are also referred to as domains.
17 Hypervisor indicates the type/form of associativity used via "ibm,architecture-vec-5 property".
18 Bit 0 of byte 5 in the "ibm,architecture-vec-5" property indicates usage of Form 0 or Form 1.
20 bit 2 of byte 5 in the "ibm,architecture-vec-5" property is used.
23 ------
27 ------
28 With Form 1 a combination of ibm,associativity-reference-points, and ibm,associativity
29 device tree properties are used to determine the NUMA distance between resource groups/domains.
34 The “ibm,associativity-reference-points” property contains a list of one or more numbers
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/linux/Documentation/ABI/testing/
H A Dconfigfs-iio4 Contact: linux-iio@vger.kernel.org
7 directory. It contains sub-groups corresponding to IIO
H A Dconfigfs-acpi4 Contact: linux-acpi@vger.kernel.org
7 contains sub-groups corresponding to ACPI configurable options.
18 - a binary attribute that the user can use to
27 The rest of the attributes are read-only and are valid only
31 - ASCII table signature
34 - length of table in bytes, including the header
37 - ACPI Specification minor version number
40 - ASCII OEM identification
43 - ASCII OEM table identification
46 - OEM revision number
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/linux/drivers/media/platform/ti/am437x/
H A Dam437x-vpfe.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2013 - 2014 Texas Instruments, Inc.
12 #include <linux/am437x-vpfe.h>
20 #include <media/v4l2-dev.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/videobuf2-v4l2.h>
24 #include <media/videobuf2-dma-contig.h>
26 #include "am437x-vpfe_regs.h"
36 /* BT656 - 8 bit */
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/linux/drivers/platform/chrome/
H A Dchromeos_acpi.c1 // SPDX-License-Identifier: GPL-2.0-only
30 return attr->mode; \
40 ret = parse_attr_name(attr->attr.name, name, &num); \
73 union acpi_object *element = obj->package.elements; in chromeos_acpi_handle_package()
75 if (pkg_num >= obj->package.count) in chromeos_acpi_handle_package()
76 return -EINVAL; in chromeos_acpi_handle_package()
79 if (element->type == ACPI_TYPE_PACKAGE) { in chromeos_acpi_handle_package()
80 if (sub_pkg_num >= element->package.count) in chromeos_acpi_handle_package()
81 return -EINVAL; in chromeos_acpi_handle_package()
82 /* select sub element inside this package */ in chromeos_acpi_handle_package()
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/linux/Documentation/admin-guide/cgroup-v1/
H A Dcgroups.rst2 Control Groups
6 Documentation/admin-guide/cgroup-v1/cpusets.rst
12 Portions Copyright (c) 2004-2006 Silicon Graphics, Inc.
20 1. Control Groups
38 1. Control Groups
42 ----------------------
44 Control Groups provide a mechanism for aggregating/partitioning sets of
45 tasks, and all their future children, into hierarchical groups with
54 facilities provided by cgroups to treat groups of tasks in
56 schedules a resource or applies per-cgroup limits, but it may be
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