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/linux/Documentation/devicetree/bindings/memory-controllers/
H A Dmediatek,smi-common.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/memory-controller
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/linux/Documentation/devicetree/bindings/mfd/
H A Dtps6105x.txt
/linux/Documentation/driver-api/media/
H A Dv4l2-intro.rst1 .. SPDX-License-Identifier: GPL-2.0
4 ------------
8 /dev, and create also non-V4L2 devices such as DVB, ALSA, FB, I2C and input
15 called 'sub-devices'.
22 connecting to sub-devices themselves. Some of this is quite complicated
25 There is also a lot of common code that could never be refactored due to
30 common code into utility functions shared by all drivers.
32 A good example to look at as a reference is the v4l2-pci-skeleton.c
38 -------------------------
44 2) A way of initializing and commanding sub-devices (if any).
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H A Dv4l2-subdev.rst1 .. SPDX-License-Identifier: GPL-2.0
3 V4L2 sub-devices
4 ----------------
6 Many drivers need to communicate with sub-devices. These devices can do all
8 encoding or decoding. For webcams common sub-devices are sensors and camera
12 driver with a consistent interface to these sub-devices the
13 :c:type:`v4l2_subdev` struct (v4l2-subdev.h) was created.
15 Each sub-device driver must have a :c:type:`v4l2_subdev` struct. This struct
16 can be stand-alone for simple sub-devices or it might be embedded in a larger
18 low-level device struct (e.g. ``i2c_client``) that contains the device data as
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/linux/Documentation/devicetree/bindings/leds/
H A Dleds-lt3593.txt4 - compatible: Should be "lltc,lt3593".
5 - lltc,ctrl-gpios: A handle to the GPIO that is connected to the 'CTRL'
9 configured in a sub-node in the device node.
11 Optional sub-node properties:
12 - function: See Documentation/devicetree/bindings/leds/common.txt
13 - color: See Documentation/devicetree/bindings/leds/common.txt
14 - label: A label for the LED. If none is given, the LED will be
16 - linux,default-trigger: The default trigger for the LED.
17 See Documentation/devicetree/bindings/leds/common.txt
18 - default-state: The initial state of the LED.
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H A Dleds-spi-byte.txt4 - one LED is controlled by a single byte on MOSI
5 - the value of the byte gives the brightness between two values (lowest to
7 - no return value is necessary (no MISO signal)
16 configured in a sub-node in the device node.
19 - compatible: should be one of
20 * "ubnt,acb-spi-led" microcontroller (SONiX 8F26E611LA) based device
23 Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
26 LED sub-node properties:
27 - label:
28 see Documentation/devicetree/bindings/leds/common.txt
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H A Dleds-lgm.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/leds-lgm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Zhu, Yi Xin <Yixin.zhu@intel.com>
11 - Amireddy Mallikarjuna reddy <mallikarjunax.reddy@intel.com>
15 const: intel,lgm-ssoled
23 clock-names:
25 - const: sso
26 - const: fpid
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H A Dleds-cr0014114.txt1 Crane Merchandising System - cr0014114 LED driver
2 -------------------------------------------------
8 - compatible: "crane,cr0014114"
10 Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
11 apply. In particular, "reg" and "spi-max-frequency" properties must be given.
13 LED sub-node properties:
14 - function :
15 see Documentation/devicetree/bindings/leds/common.txt
16 - color :
17 see Documentation/devicetree/bindings/leds/common.txt
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/linux/Documentation/userspace-api/media/v4l/
H A Dselections-common.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
4 .. _v4l2-selections-common:
6 Common selection definitions
9 While the :ref:`V4L2 selection API <selection-api>` and
10 :ref:`V4L2 subdev selection APIs <v4l2-subdev-selections>` are very
12 sub-device API, the selection rectangle refers to the media bus format,
13 and is bound to a sub-device's pad. On the V4L2 interface the selection
14 rectangles refer to the in-memory pixel format.
16 This section defines the common definitions of the selection interfaces
23 v4l2-selection-targets
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H A Dvidioc-subdev-enum-frame-interval.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL - Enumerate frame intervals
35 given sub-device pad. Frame intervals only makes sense for sub-devices
39 For the common use case of image sensors, the frame intervals available
40 on the sub-device output pad depend on the frame format and size on the
54 other pads of the sub-device, as well as on the current active links.
58 Sub-devices that support the frame interval enumeration ioctl should
60 multiple pads of the same sub-device is not defined.
66 .. flat-table:: struct v4l2_subdev_frame_interval_enum
67 :header-rows: 0
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/linux/drivers/acpi/acpica/
H A Dutdelete.c1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: utdelete - object deletion and reference count utilities
27 * PARAMETERS: object - Object to be deleted
32 * updated (All reference counts, including sub-objects!)
55 switch (object->common.type) { in acpi_ut_delete_internal_obj()
60 object->string.pointer)); in acpi_ut_delete_internal_obj()
64 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { in acpi_ut_delete_internal_obj()
68 obj_pointer = object->string.pointer; in acpi_ut_delete_internal_obj()
76 object->buffer.pointer)); in acpi_ut_delete_internal_obj()
80 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { in acpi_ut_delete_internal_obj()
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/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
26 - Group 0: PMU Cycle Counter. This group has one pair of counters
30 - Group 1: PMU Bandwidth Counters. This group has 8 counters that are used
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/linux/tools/perf/Documentation/
H A Dperf-script-perl.txt
/linux/drivers/media/platform/ti/davinci/
H A Dvpif_display.c2 * vpif-display - VPIF display driver
5 * Copyright (C) 2009 Texas Instruments Incorporated - https://www.ti.com/
23 #include <media/v4l2-ioctl.h>
42 MODULE_PARM_DESC(debug, "Debug level 0-1");
74 struct channel_obj *ch = vb2_get_drv_priv(vb->vb2_queue); in vpif_buffer_prepare()
75 struct common_obj *common; in vpif_buffer_prepare() local
77 common = &ch->common[VPIF_VIDEO_INDE in vpif_buffer_prepare()
116 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_buffer_queue_setup() local
149 struct common_obj *common; vpif_buffer_queue() local
170 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_start_streaming() local
255 struct common_obj *common; vpif_stop_streaming() local
302 process_progressive_mode(struct common_obj * common) process_progressive_mode() argument
322 process_interlaced_mode(int fid,struct common_obj * common) process_interlaced_mode() argument
364 struct common_obj *common; vpif_channel_isr() local
458 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_update_resolution() local
501 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_calculate_offsets() local
562 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_config_addr() local
608 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_g_fmt_vid_out() local
625 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_try_fmt_vid_out() local
653 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_s_fmt_vid_out() local
677 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_s_std() local
841 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_s_output() local
910 struct common_obj *common = &ch->common[VPIF_VIDEO_INDEX]; vpif_s_dv_timings() local
1119 struct common_obj *common; vpif_probe_complete() local
1328 struct common_obj *common; vpif_suspend() local
1360 struct common_obj *common; vpif_resume() local
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/linux/drivers/mfd/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
42 using the SPI interface. This driver provides common support for
58 tristate "Active-semi ACT8945A"
63 Support for the ACT8945A PMIC from Active-semi. This device
64 features three step-down DC/DC converters and four low-dropout
80 sun4i-gpad
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/linux/Documentation/devicetree/bindings/mailbox/
H A Dti,omap-mailbox.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/mailbox/ti,omap-mailbo
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/linux/Documentation/devicetree/bindings/sound/
H A Dst,stm32-sai.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/st,stm32-sai.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Olivier Moysan <olivier.moysan@foss.st.com>
14 protocols as I2S standards, LSB or MSB-justified, PCM/DSP, TDM, and AC'97.
15 The SAI contains two independent audio sub-blocks. Each sub-block has
21 - st,stm32f4-sai
22 - st,stm32h7-sai
23 - st,stm32mp25-sai
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H A Dsamsung,midas-audio.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/samsung,midas-audio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sylwester Nawrocki <s.nawrocki@samsung.com>
13 - $ref: sound-card-common.yaml#
17 const: samsung,midas-audio
23 sound-dai:
27 - sound-dai
33 sound-dai:
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/linux/tools/perf/scripts/perl/
H A Dwakeup-latency.pl
H A Drw-by-file.pl
/linux/arch/arm/kernel/
H A Dhead-nommu.S1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * linux/arch/arm/kernel/head-nommu.S
5 * Copyright (C) 1994-2002 Russell King
6 * Copyright (C) 2003-2006 Hyok S. Choi
8 * Common kernel startup code (non-paged MM)
16 #include <asm/asm-offset
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/linux/Documentation/devicetree/bindings/remoteproc/
H A Dti,keystone-rproc.txt5 sub-systems that are used to offload some of the processor-intensive tasks or
8 These processor sub-systems usually contain additional sub-modules like L1
15 Each DSP Core sub-system is represented as a single DT node, and should also
22 --------------------
25 - compatible: Should be one of the following,
26 "ti,k2hk-dsp" for DSPs on Keystone 2 66AK2H/K SoCs
27 "ti,k2l-dsp" for DSPs on Keystone 2 66AK2L SoCs
28 "ti,k2e-dsp" for DSPs on Keystone 2 66AK2E SoCs
29 "ti,k2g-dsp" for DSPs on Keystone 2 66AK2G SoCs
31 - reg: Should contain an entry for each value in 'reg-names'.
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/linux/drivers/iommu/generic_pt/
H A Dpt_common.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2024-2025, NVIDIA CORPORATION & AFFILIATES
17 * entry and can be called with a pts->index pointing to any sub item that makes
32 * pt_attr_from_entry() - Convert the permission bits back to attrs
44 * pt_can_have_leaf() - True if the current level can have an OA entry
53 * pt_can_have_table() - True if the current level can have a lower table
61 return pts->level > 0; in pt_can_have_table()
65 * pt_clear_entries() - Make entries empty (non-present)
77 * pt_entry_make_write_dirty() - Make an entry dirty
87 * pt_entry_make_write_clean() - Make the entry write clean
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/linux/arch/nios2/boot/compressed/
H A Dhead.S28 sub r1, r1, r2
34 sub r1, r1, r2
43 addi r1, r1, (_start - chkadr) /* Source */
55 sub r1, r1, r2
61 /* zero out the .bss segment (uninitialized common data) */
73 /* save args passed from u-boot, maybe */
74 addi sp, sp, -16
91 sub r1, r1, r2
97 sub r1, r1, r2
/linux/Documentation/ABI/testing/
H A Dsysfs-devices-soc5 The /sys/devices/ directory contains a sub-directory for each
6 System-on-Chip (SoC) device on a running platform. Information
19 Read-only attribute common to all SoCs. Contains the SoC machine
26 Read-only attribute common to all SoCs. Contains SoC family name
57 Read-only attribute supported by most SoCs. Contains the SoC's
64 Read-only attribute supported by most SoCs. In the case of
65 ST-Ericsson's chips this contains the SoC serial number.
77 Read-only attribute supported by most SoCs. Contains the SoC's
84 Read-only attribute supported ST-Ericsson's silicon. Contains the
91 The /sys/bus/soc/ directory contains the usual sub-folders

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