Home
last modified time | relevance | path

Searched +full:idle +full:- +full:state +full:- +full:name (Results 1 – 25 of 68) sorted by relevance

123

/Documentation/devicetree/bindings/powerpc/opal/
Dpower-mgt.txt1 IBM Power-Management Bindings
5 idle states. The description of these idle states is exposed via the
6 node @power-mgt in the device-tree by the firmware.
9 ----------------
10 Typically each idle state has the following associated properties:
12 - name: The name of the idle state as defined by the firmware.
14 - flags: indicating some aspects of this idle states such as the
15 extent of state-loss, whether timebase is stopped on this
16 idle states and so on. The flag bits are as follows:
18 - exit-latency: The latency involved in transitioning the state of the
[all …]
/Documentation/admin-guide/pm/
Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
8 CPU Idle Time Management
21 memory or executed. Those states are the *idle* states of the processor.
23 Since part of the processor hardware is not used in idle states, entering them
27 CPU idle time management is an energy-efficiency feature concerned about using
28 the idle states of processors for this purpose.
31 ------------
33 CPU idle time management operates on CPUs as seen by the *CPU scheduler* (that
37 software as individual single-core processors. In other words, a CPU is an
44 enter an idle state, that applies to the processor as a whole.
[all …]
Dintel_idle.rst1 .. SPDX-License-Identifier: GPL-2.0
5 ``intel_idle`` CPU Idle Time Management Driver
17 :doc:`CPU idle time management subsystem <cpuidle>` in the Linux kernel
18 (``CPUIdle``). It is the default CPU idle time management driver for the
24 Documentation/admin-guide/pm/cpuidle.rst if you have not done that yet.]
27 logical CPU executing it is idle and so it may be possible to put some of the
28 processor's functional blocks into low-power states. That instruction takes two
38 only way to pass early-configuration-time parameters to it is via the kernel
42 .. _intel-idle-enumeration-of-states:
44 Enumeration of Idle States
[all …]
/Documentation/driver-api/pm/
Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
5 CPU Idle Time Management
13 CPU Idle Time Management Subsystem
18 cores) is idle after an interrupt or equivalent wakeup event, which means that
19 there are no tasks to run on it except for the special "idle" task associated
21 belongs to. That can be done by making the idle logical CPU stop fetching
23 depended on by it into an idle state in which they will draw less power.
25 However, there may be multiple different idle states that can be used in such a
28 particular idle state. That is the role of the CPU idle time management
35 units: *governors* responsible for selecting idle states to ask the processor
[all …]
/Documentation/devicetree/bindings/regulator/
Drohm,bd71828-regulator.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/regulator/rohm,bd71828-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
14 see Documentation/devicetree/bindings/mfd/rohm,bd71828-pmic.yaml.
16 The regulator controller is represented as a sub-node of the PMIC node
25 "^LDO[1-7]$":
32 regulator-name:
33 pattern: "^ldo[1-7]$"
[all …]
Drohm,bd71847-regulator.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/regulator/rohm,bd71847-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
15 Documentation/devicetree/bindings/mfd/rohm,bd71847-pmic.yaml
20 Note that if BD71847 starts at RUN state you probably want to use
21 regulator-boot-on at least for BUCK5. LDO6 is supplied by it and it must
30 "^LDO[1-6]$":
37 regulator-name:
[all …]
Drohm,bd71837-regulator.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/regulator/rohm,bd71837-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
15 Documentation/devicetree/bindings/mfd/rohm,bd71837-pmic.yaml
20 Note that if BD71837 starts at RUN state you probably want to use
21 regulator-boot-on at least for BUCK6 and BUCK7 so that those are not
31 "^LDO[1-7]$":
38 regulator-name:
[all …]
/Documentation/devicetree/bindings/cpu/
Didle-states.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpu/idle-states.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Idle states
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
11 - Anup Patel <anup@brainfault.org>
15 1 - Introduction
18 ARM and RISC-V systems contain HW capable of managing power consumption
19 dynamically, where cores can be put in different low-power states (ranging
[all …]
/Documentation/trace/
Devents-power.rst8 - Power state switch which reports events related to suspend (S-states),
9 cpuidle (C-states) and cpufreq (P-states)
10 - System clock related changes
11 - Power domains related changes and transitions
18 1. Power state switch events
22 -----------------
24 A 'cpu' event class gathers the CPU-related events: cpuidle and
28 cpu_idle "state=%lu cpu_id=%lu"
29 cpu_frequency "state=%lu cpu_id=%lu"
36 machine_suspend "state=%lu"
[all …]
/Documentation/devicetree/bindings/pinctrl/
Dpinctrl-bindings.txt4 such as pull-up/down, tri-state, drive-strength etc are designated as pin
15 need to reconfigure pins at run-time, for example to tri-state pins when the
21 for client device device tree nodes to map those state names to the pin
25 For example, a pin controller may set up its own "active" state when the
35 For each client device individually, every pin state is assigned an integer
36 ID. These numbers start at 0, and are contiguous. For each state ID, a unique
37 property exists to define the pin configuration. Each state may also be
38 assigned a name. When names are used, another property exists to map from
42 defined in its device tree node, and whether to define the set of state
43 IDs that must be provided, or whether to define the set of state names that
[all …]
/Documentation/ABI/testing/
Dsysfs-devices-system-cpu2 Date: pre-git history
3 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
18 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
37 See Documentation/admin-guide/cputopology.rst for more information.
43 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
58 Contact: Linux memory management mailing list <linux-mm@kvack.org>
67 /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
77 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
89 core_siblings_list: human-readable list of the logical CPU
99 thread_siblings_list: human-readable list of cpuX's hardware
[all …]
Dsysfs-class-regulator1 What: /sys/class/regulator/.../state
7 state. This reports the regulator enable control, for
20 supplying power to the system (unless some non-Linux
23 'unknown' means software cannot determine the state, or
24 the reported state is invalid.
38 - off
39 - on
40 - error
41 - fast
42 - normal
[all …]
/Documentation/devicetree/bindings/mfd/
Drohm,bd71847-pmic.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/mfd/rohm,bd71847-pmic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
14 single-core, dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is
18 …/www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applica…
19 …//www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applic…
24 - rohm,bd71847
25 - rohm,bd71850
[all …]
Drohm,bd71837-pmic.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/mfd/rohm,bd71837-pmic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Matti Vaittinen <mazziesaccount@gmail.com>
13 BD71837MWV is programmable Power Management ICs for powering single-core,
14 dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is optimized for low
18 …/www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applica…
35 clock-names:
38 "#clock-cells":
[all …]
/Documentation/admin-guide/
Dkernel-per-CPU-kthreads.rst2 Reducing OS jitter due to per-cpu kthreads
5 This document lists per-CPU kthreads in the Linux kernel and presents
6 options to control their OS jitter. Note that non-per-CPU kthreads are
7 not listed here. To reduce OS jitter from non-per-CPU kthreads, bind
13 - Documentation/core-api/irq/irq-affinity.rst: Binding interrupts to sets of CPUs.
15 - Documentation/admin-guide/cgroup-v1: Using cgroups to bind tasks to sets of CPUs.
17 - man taskset: Using the taskset command to bind tasks to sets
20 - man sched_setaffinity: Using the sched_setaffinity() system
23 - /sys/devices/system/cpu/cpuN/online: Control CPU N's hotplug state,
26 - In order to locate kernel-generated OS jitter on CPU N:
[all …]
Dmd.rst5 ---------------------------------
49 -1 linear mode
58 (raid-0 and raid-1 only)
78 --------------------------------------
87 that all auto-detected arrays are assembled as partitionable.
90 -------------------------------------------
102 mdadm --assemble --force ....
112 md-mod.start_dirty_degraded=1
116 ------------------
119 Currently, it supports superblock formats ``0.90.0`` and the ``md-1`` format
[all …]
/Documentation/devicetree/bindings/mmc/
Dti-omap-hsmmc.txt10 --------------------
11 - compatible:
12 Should be "ti,omap2-hsmmc", for OMAP2 controllers
13 Should be "ti,omap3-hsmmc", for OMAP3 controllers
14 Should be "ti,omap3-pre-es3-hsmmc" for OMAP3 controllers pre ES3.0
15 Should be "ti,omap4-hsmmc", for OMAP4 controllers
16 Should be "ti,am33xx-hsmmc", for AM335x controllers
17 Should be "ti,k2g-hsmmc", "ti,omap4-hsmmc" for 66AK2G controllers.
20 ---------------------------------
22 - ti,hwmods: Must be "mmc<n>", n is controller instance starting 1.
[all …]
/Documentation/livepatch/
Dlivepatch.rst30 - The kernel probes are the most generic. The code can be redirected by
33 - The function tracer calls the code from a predefined location that is
35 compiler using the '-pg' gcc option.
37 - Livepatching typically needs to redirect the code at the very beginning
74 The aim is to define a so-called consistency model. It attempts to define
79 kpatch: it uses kGraft's per-task consistency and syscall barrier
83 Patches are applied on a per-task basis, when the task is deemed safe to
85 transition state where tasks are converging to the patched state.
86 Usually this transition state can complete in a few seconds. The same
88 the patched state to the unpatched state.
[all …]
/Documentation/RCU/Design/Data-Structures/
DData-Structures.rst15 Data-Structure Relationships
18 RCU is for all intents and purposes a large state machine, and its
19 data structures maintain the state in such a way as to allow RCU readers
25 .. kernel-figure:: BigTreeClassicRCU.svg
34 which results in a three-level ``rcu_node`` tree.
38 The purpose of this combining tree is to allow per-CPU events
39 such as quiescent states, dyntick-idle transitions,
42 Quiescent states are recorded by the per-CPU ``rcu_data`` structures,
43 and other events are recorded by the leaf-level ``rcu_node``
50 has passed through a quiescent state.
[all …]
/Documentation/devicetree/bindings/soc/qcom/
Dqcom,rpmh-rsc.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/soc/qcom/qcom,rpmh-rsc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Bjorn Andersson <bjorn.andersson@linaro.org>
20 (Resource State Coordinator a.k.a RSC) that can handle multiple sleep and
26 have powered off to facilitate idle power saving. TCS could be classified as::
27 ACTIVE - Triggered by Linux
28 SLEEP - Triggered by F/W
29 WAKE - Triggered by F/W
[all …]
/Documentation/admin-guide/blockdev/
Dzram.rst2 zram: Compressed RAM-based block devices
8 The zram module creates RAM-based block devices named /dev/zram<id>
20 There are several ways to configure and manage zram device(-s):
23 b) using zramctl utility, provided by util-linux (util-linux@vger.kernel.org).
28 In order to get a better idea about zramctl please consult util-linux
29 documentation, zramctl man-page or `zramctl --help`. Please be informed
30 that zram maintainers do not develop/maintain util-linux or zramctl, should
31 you have any questions please contact util-linux@vger.kernel.org
45 -EBUSY an attempt to modify an attribute that cannot be changed once
47 -ENOMEM zram was not able to allocate enough memory to fulfil your
[all …]
/Documentation/timers/
Dhighres.rst8 https://www.kernel.org/doc/ols/2006/ols2006v1-pages-333-346.pdf
11 http://www.cs.columbia.edu/~nahum/w6998/papers/ols2006-hrtimers-slides.pdf
19 switched to the name "clock event devices" in meantime.
23 - hrtimer base infrastructure
24 - timeofday and clock source management
25 - clock event management
26 - high resolution timer functionality
27 - dynamic ticks
31 ---------------------------
40 - time ordered enqueueing into a rb-tree
[all …]
/Documentation/devicetree/bindings/gpio/
Dti,omap-gpio.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gpio/ti,omap-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Grygorii Strashko <grygorii.strashko@ti.com>
13 The general-purpose interface combines general-purpose input/output (GPIO) banks.
14 Each GPIO banks provides up to 32 dedicated general-purpose pins with input
15 and output capabilities; interrupt generation in active mode and wake-up
16 request generation in idle mode upon the detection of external events.
21 - enum:
[all …]
/Documentation/devicetree/bindings/soc/ti/
Dwkup-m3-ipc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/soc/ti/wkup-m3-ipc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Dave Gerlach <d-gerlach@ti.com>
11 - Drew Fustini <dfustini@baylibre.com>
14 The TI AM33xx and AM43xx family of devices use a small Cortex M3 co-processor
17 C-states for CPU Idle. Once the wkup_m3_ipc driver uses the wkup_m3_rproc driver
29 On some boards like the AM335x EVM-SK and the AM437x GP EVM, a GPIO pin is
37 On AM437x SoCs, certain pins can be forced into an alternate state when IO
[all …]
/Documentation/devicetree/bindings/input/touchscreen/
Dbrcm,iproc-touchscreen.txt4 - compatible: must be "brcm,iproc-touchscreen"
5 - ts_syscon: handler of syscon node defining physical base
9 - clocks: The clock provided by the SOC to driver the tsc
10 - clock-names: name for the clock
11 - interrupts: The touchscreen controller's interrupt
12 - address-cells: Specify the number of u32 entries needed in child nodes.
14 - size-cells: Specify number of u32 entries needed to specify child nodes size
18 - scanning_period: Time between scans. Each step is 1024 us. Valid 1-256.
19 - debounce_timeout: Each step is 512 us. Valid 0-255
20 - settling_timeout: The settling duration (in ms) is the amount of time
[all …]

123