| /linux/tools/power/cpupower/man/ |
| H A D | cpupower-idle-info.1 | 1 .TH "CPUPOWER-IDLE-INFO" "1" "0.1" "" "cpupower Manual"
4 cpupower\-idle\-info \- Utility to retrieve cpu idle kernel information
7 cpupower [ \-c cpulist ] idle\-info [\fIoptions\fP]
14 \fB\-f\fR \fB\-\-silent\fR
15 Only print a summary of all available C-states in the system.
17 \fB\-e\fR \fB\-\-proc\fR
23 .SH IDLE\-INFO DESCRIPTIONS
24 CPU sleep state statistics and descriptions are retrieved from sysfs files,
26 statistics when it enters or leaves an idle state, therefore on a very idle or
28 good overview about the usage and availability of processor sleep states on
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| H A D | cpupower-monitor.1 | 1 .TH CPUPOWER\-MONITOR "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-monitor \- Report processor frequency and idle statistics
7 .RB "\-l"
10 .RB [ -c ] [ "\-m <mon1>," [ "<mon2>,..." ] ]
11 .RB [ "\-i seconds" ]
14 .RB [ -c ][ "\-m <mon1>," [ "<mon2>,..." ] ]
18 \fBcpupower-monitor \fP reports processor topology, frequency and idle power
19 state statistics. Either \fBcommand\fP is forked and
22 \fBcpupower-monitor \fP implements independent processor sleep state and
24 directly reading out hardware registers. Use \-l to get an overview which are
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| /linux/Documentation/admin-guide/pm/ |
| H A D | suspend-flows.rst | 1 .. SPDX-License-Identifier: GPL-2.0
12 At least one global system-wide transition needs to be carried out for the
13 system to get from the working state into one of the supported
14 :doc:`sleep states <sleep-states>`. Hibernation requires more than one
15 transition to occur for this purpose, but the other sleep states, commonly
16 referred to as *system-wide suspend* (or simply *system suspend*) states, need
19 For those sleep states, the transition from the working state of the system into
20 the target sleep state is referred to as *system suspend* too (in the majority
21 of cases, whether this means a transition or a sleep state of the system should
22 be clear from the context) and the transition back from the sleep state into the
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| H A D | strategies.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 The Linux kernel supports two major high-level power management strategies.
15 One of them is based on using global low-power states of the whole system in
17 significantly reduced, referred to as :doc:`sleep states <sleep-states>`. The
20 designated devices, triggering a transition to the ``working state`` in which
21 user space code can run. Because sleep states are global and the whole system
22 is affected by the state changes, this strategy is referred to as the
23 :doc:`system-wide power management <system-wide>`.
25 The other strategy, referred to as the :doc:`working-state power management
26 <working-state>`, is based on adjusting the power states of individual hardware
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| H A D | sleep-states.rst | 1 .. SPDX-License-Identifier: GPL-2.0
5 System Sleep States
13 Sleep states are global low-power states of the entire system in which user
18 Sleep States That Can Be Supported
22 the Linux kernel can support up to four system sleep states, including
23 hibernation and up to three variants of system suspend. The sleep states that
28 Suspend-to-Idle
29 ---------------
31 This is a generic, pure software, light-weight variant of system suspend (also
34 I/O devices into low-power states (possibly lower-power than available in the
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| /linux/Documentation/devicetree/bindings/pinctrl/ |
| H A D | sprd,sc9860-pinctrl.txt | 7 - compatible: Must be "sprd,sc9860-pinctrl".
8 - reg: The register address of pin controller device.
9 - pins : An array of strings, each string containing the name of a pin.
12 - function: A string containing the name of the function, values must be
14 - drive-strength: Drive strength in mA. Supported values: 2, 4, 6, 8, 10,
16 - input-schmitt-disable: Enable schmitt-trigger mode.
17 - input-schmitt-enable: Disable schmitt-trigger mode.
18 - bias-disable: Disable pin bias.
19 - bias-pull-down: Pull down on pin.
20 - bias-pull-up: Pull up on pin. Supported values: 20000 for pull-up resistor
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| H A D | sprd,pinctrl.txt | 16 of them, so we can not make every Spreadtrum-special configuration
29 to configure the pin sleep mode, function select and sleep related
32 Now we have 4 systems for sleep mode on SC9860 SoC: AP system,
33 PUBCP system, TGLDSP system and AGDSP system. And the pin sleep
35 - input-enable
36 - input-disable
37 - output-high
38 - output-low
39 - bias-pull-up
40 - bias-pull-down
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| H A D | pincfg-node.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/pincfg-node.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linus.walleij@linaro.org>
16 for all hardware or binding structures. Each individual binding document
17 should state which of these generic properties, if any, are used, and the
21 bias-disable:
25 bias-high-impedance:
27 description: high impedance mode ("third-state", "floating")
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| /linux/arch/arm/mach-omap2/ |
| H A D | clockdomain.c | 1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2008-2011 Texas Instruments, Inc.
6 * Copyright (C) 2008-2011 Nokia Corporation
22 #include <linux/clk-provider.h>
56 if (!strcmp(name, temp_clkdm->name)) { in _clkdm_lookup()
66 * _clkdm_register - register a clockdomain
70 * Returns -EINVAL if given a null pointer, -EEXIST if a clockdomain is
77 if (!clkdm || !clkdm->name) in _clkdm_register()
78 return -EINVAL; in _clkdm_register()
80 pwrdm = pwrdm_lookup(clkdm->pwrdm.name); in _clkdm_register()
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| H A D | powerdomain.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 2007-2008, 2010 Texas Instruments, Inc.
6 * Copyright (C) 2007-2011 Nokia Corporation
10 * XXX This should be moved to the mach-omap2/ directory at the earliest
29 /* Powerdomain allowable state bitfields */
45 * PWRDM_HAS_HDWR_SAR - powerdomain has hardware save-and-restore support
47 * PWRDM_HAS_MPU_QUIRK - MPU pwr domain has MEM bank 0 bits in MEM
50 * PWRDM_HAS_LOWPOWERSTATECHANGE - can transition from a sleep state
51 * to a lower sleep state without waking up the powerdomain
58 * Number of memory banks that are power-controllable. On OMAP4430, the
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| H A D | clockdomain.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
6 * Copyright (C) 2008-2011 Nokia Corporation
33 * hardware-supervised idle mode, the PRCM may transition the
34 * enclosing powerdomain to a low power state, even when devices
38 * force-sleep mode, then the HW_AUTO mode will be used to put the
39 * clockdomain to sleep. Similarly, if the clockdomain supports
40 * the force-wakeup mode, then it will be used whenever a clock or
58 * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
59 * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
67 * omap_hwmod-based fine-grained module idle control is added.
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-power | 9 What: /sys/power/state
13 The /sys/power/state file controls system sleep states.
14 Reading from this file returns the available sleep state
15 labels, which may be "mem" (suspend), "standby" (power-on
16 suspend), "freeze" (suspend-to-idle) and "disk" (hibernation).
19 to transition into the corresponding state, if available.
21 See Documentation/admin-guide/pm/sleep-states.rst for more
32 to suspend the system (by writing "mem" to the /sys/power/state
39 See Documentation/admin-guide/pm/sleep-states.rst for more
47 suspend-to-disk mechanism. Reading from this file returns
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| /linux/Documentation/devicetree/bindings/mfd/ |
| H A D | max77620.txt | 4 -------------------
5 - compatible: Must be one of
9 - reg: I2C device address.
12 -------------------
13 - interrupts: The interrupt on the parent the controller is
15 - interrupt-controller: Marks the device node as an interrupt controller.
16 - #interrupt-cells: is <2> and their usage is compliant to the 2 cells
17 variant of <../interrupt-controller/interrupts.txt>
19 are defined at dt-bindings/mfd/max77620.h.
21 - system-power-controller: Indicates that this PMIC is controlling the
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| /linux/drivers/acpi/acpica/ |
| H A D | hwsleep.c | 1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
5 * original/legacy sleep/PM registers.
7 * Copyright (C) 2000 - 2025, Intel Corp.
22 * PARAMETERS: sleep_state - Which sleep state to enter
26 * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
79 "Entering sleep state [S%u]\n", sleep_state)); in acpi_hw_legacy_sleep()
83 pm1a_control &= ~(sleep_type_reg_info->access_bit_mask | in acpi_hw_legacy_sleep()
84 sleep_enable_reg_info->access_bit_mask); in acpi_hw_legacy_sleep()
90 (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position); in acpi_hw_legacy_sleep()
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| H A D | hwxface.c | 1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Module Name: hwxface - Public ACPICA hardware interfaces
6 * Copyright (C) 2000 - 2025, Intel Corp.
44 !reset_reg->address) { in acpi_reset()
48 if (reset_reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) { in acpi_reset()
60 status = acpi_os_write_port((acpi_io_address)reset_reg->address, in acpi_reset()
78 * PARAMETERS: value - Where the value is returned in ACPI_EXPORT_SYMBOL()
79 * reg - GAS register structure in ACPI_EXPORT_SYMBOL()
108 * PARAMETERS: value - Value to be written in ACPI_EXPORT_SYMBOL()
109 * reg - GAS register structure in ACPI_EXPORT_SYMBOL()
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| H A D | hwesleep.c | 1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
4 * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the
5 * extended FADT-V5 sleep registers.
7 * Copyright (C) 2000 - 2025, Intel Corp.
21 * PARAMETERS: method_pathname - Pathname of method to execute
22 * integer_argument - Argument to pass to the method
26 * DESCRIPTION: Execute a sleep/wake related method with one integer argument
58 * PARAMETERS: sleep_state - Which sleep state to enter
62 * DESCRIPTION: Enter a system sleep state via the extended FADT sleep
76 /* Extended sleep registers must be valid */ in acpi_hw_extended_sleep()
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| /linux/tools/power/x86/turbostat/ |
| H A D | turbostat.8 | 3 turbostat \- Report processor frequency and idle statistics
12 .RB [ "\--interval seconds" ]
15 idle power-state statistics, temperature and power on X86 processors.
19 in one-shot upon its completion.
22 The 5-second interval can be changed using the --interval option.
26 Options can be specified with a single or double '-', and only as much of the option
27 name as necessary to disambiguate it from others is necessary. Note that options are case-sensitiv…
29 \fB--add attributes\fP add column with counter having specified 'attributes'. The 'location' attri…
39 … event for given device from /sys/bus/event_source/devices/<device>/events/<event> eg. c1-residency
40 …perf/cstate_core/c1-residency would then use /sys/bus/event_source/devices/cstate_core/events/c1-r…
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| /linux/include/linux/ |
| H A D | leds.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
11 #include <dt-bindings/leds/common.h>
47 * struct led_lookup_data - represents a single LED lookup entry
66 * with in-driver hard-coded LED names used as a fallback when
79 * only LEDs exposed by drivers of hot-pluggable devices should
122 /* Brightness off also disables hw-blinking so it is a separate action */
128 * Must not sleep. Use brightness_set_blocking for drivers
129 * that can sleep while setting brightness.
134 * Set LED brightness level immediately - it can block the caller for
143 * Activate hardware accelerated blink, delays are in milliseconds
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| H A D | serial_core.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
25 ((port)->cons && (port)->cons->index == (port)->line)
37 * struct uart_ops -
493 struct uart_state *state; /* pointer to parent state */ global() member
888 struct uart_state *state; global() member
1269 struct uart_state *state = port->state; uart_handle_break() local
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| /linux/Documentation/power/ |
| H A D | swsusp.rst | 23 your hardware while system is suspended... well, it was not good idea;
45 echo shutdown > /sys/power/disk; echo disk > /sys/power/state
47 - If you feel ACPI works pretty well on your system, you might try::
49 echo platform > /sys/power/disk; echo disk > /sys/power/state
51 - If you would like to write hibernation image to swap and then suspend
54 echo suspend > /sys/power/disk; echo disk > /sys/power/state
56 - If you have SATA disks, you'll need recent kernels with SATA suspend
58 are built into kernel -- not modules. [There's way to make
68 - The resume process checks for the presence of the resume device,
72 - The resume process may be triggered in two ways:
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| /linux/include/net/ |
| H A D | mac80211.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * mac80211 <-> driver interface
5 * Copyright 2002-2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (C) 2015 - 201
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| /linux/arch/arm/mach-sa1100/ |
| H A D | sleep.S | 2 * SA11x0 Assembler Sleep/WakeUp Management Routines
11 * 2001-02-06: Cliff Brake Initial code
13 * 2001-08-29: Nicolas Pitre Simplified.
15 * 2002-05-27: Nicolas Pitre Revisited, more cleanup and simplification.
21 #include <mach/hardware.h>
27 * Causes sa11x0 to enter sleep state
41 @ Pre-load __loop_udelay into the I-cache
136 @ Wow, now the hardware suspend request pins can be used, that makes them functional for
139 @ Step 6 set force sleep bit in PMCR
143 20: b 20b @ loop waiting for sleep
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| /linux/Documentation/spi/ |
| H A D | spi-summary.rst | 5 02-Feb-2012
8 ------------
17 clocking modes through which data is exchanged; mode-0 and mode-3 are most
32 - SPI may be used for request/response style device protocols, as with
35 - It may also be used to stream data in either direction (half duplex),
38 - Some devices may use eight bit words. Others may use different word
39 lengths, such as streams of 12-bit or 20-bit digital samples.
41 - Words are usually sent with their most significant bit (MSB) first,
44 - Sometimes SPI is used to daisy-chain devices, like shift registers.
51 SPI is only one of the names used by such four-wire protocols, and
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| /linux/drivers/media/dvb-frontends/ |
| H A D | dvb_dummy_fe.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
60 * Should only be implemented if it actually reads something from the hardware.
72 if (fe->ops.tuner_ops.set_params) { in dvb_dummy_fe_set_frontend()
73 fe->ops.tuner_ops.set_params(fe); in dvb_dummy_fe_set_frontend()
74 if (fe->ops.i2c_gate_ctrl) in dvb_dummy_fe_set_frontend()
75 fe->ops.i2c_gate_ctrl(fe, 0); in dvb_dummy_fe_set_frontend()
105 struct dvb_dummy_fe_state *state = fe->demodulator_priv; in dvb_dummy_fe_release() local
107 kfree(state); in dvb_dummy_fe_release()
114 struct dvb_dummy_fe_state *state = NULL; in dvb_dummy_fe_ofdm_attach() local
116 /* allocate memory for the internal state */ in dvb_dummy_fe_ofdm_attach()
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| /linux/arch/arm/mach-pxa/ |
| H A D | pxa2xx-regs.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * arch/arm/mach-pxa/include/mach/pxa2xx-regs.h
5 * Taken from pxa-regs.h by Russell King
14 #include "pxa-regs.h"
21 #define PSSR __REG(0x40F00004) /* Power Manager Sleep Status Register */
23 #define PWER __REG(0x40F0000C) /* Power Manager Wake-up Enable Register */
24 #define PRER __REG(0x40F00010) /* Power Manager GPIO Rising-Edge Detect Enable Register */
25 #define PFER __REG(0x40F00014) /* Power Manager GPIO Falling-Edge Detect Enable Register */
28 #define PGSR0 __REG(0x40F00020) /* Power Manager GPIO Sleep State Register for GP[31-0] */
29 #define PGSR1 __REG(0x40F00024) /* Power Manager GPIO Sleep State Register for GP[63-32] */
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