| /Linux-v5.10/tools/power/cpupower/man/ |
| 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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| 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-v5.10/Documentation/admin-guide/pm/ |
| D | cpuidle.rst | 1 .. SPDX-License-Identifier: GPL-2.0
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
31 ------------
37 software as individual single-core processors. In other words, a CPU is an
43 program) at a time, it is a CPU. In that case, if the hardware is asked to
44 enter an idle state, that applies to the processor as a whole.
46 Second, if the processor is multi-core, each core in it is able to follow at
51 time. The entire cores are CPUs in that case and if the hardware is asked to
52 enter an idle state, that applies to the core that asked for it in the first
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| 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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| 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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| /Linux-v5.10/Documentation/devicetree/bindings/pinctrl/ |
| 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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| 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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| 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-v5.10/Documentation/driver-api/serial/ |
| D | driver.rst | 10 The reference implementation is contained within amba-pl011.c.
14 Low Level Serial Hardware Driver
15 --------------------------------
17 The low level serial hardware driver is responsible for supplying port
25 ---------------
38 -------
40 It is the responsibility of the low level hardware driver to perform the
41 necessary locking using port->lock. There are some exceptions (which
44 There are two locks. A per-port spinlock, and an overall semaphore.
46 From the core driver perspective, the port->lock locks the following
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| /Linux-v5.10/Documentation/driver-api/pm/ |
| D | devices.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 :Copyright: |copy| 2010-2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
18 management (PM) code is also driver-specific. Most drivers will do very
22 This writeup gives an overview of how drivers interact with system-wide
25 background for the domain-specific work you'd do with any specific driver.
31 Drivers will use one or both of these models to put devices into low-power
34 System Sleep model:
36 Drivers can enter low-power states as part of entering system-wide
37 low-power states like "suspend" (also known as "suspend-to-RAM"), or
39 "suspend-to-disk").
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| /Linux-v5.10/Documentation/locking/ |
| D | hwspinlock.rst | 2 Hardware Spinlock Framework
8 Hardware spinlock modules provide hardware assistance for synchronization
12 For example, OMAP4 has dual Cortex-A9, dual Cortex-M3 and a C64x+ DSP,
17 A generic hwspinlock framework allows platform-independent drivers to use
22 This is necessary, for example, for Inter-processor communications:
23 on OMAP4, cpu-intensive multimedia tasks are offloaded by the host to the
26 To achieve fast message-based communications, a minimal kernel support
35 A common hwspinlock interface makes it possible to have generic, platform-
50 Should be called from a process context (might sleep).
61 Should be called from a process context (might sleep).
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| /Linux-v5.10/include/linux/ |
| D | hwspinlock.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Hardware spinlock public header
5 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
7 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
17 #define HWLOCK_IRQSTATE 0x01 /* Disable interrupts, save state */
18 #define HWLOCK_IRQ 0x02 /* Disable interrupts, don't save state */
29 * struct hwspinlock_pdata - platform data for hwspinlock drivers
32 * hwspinlock devices provide system-wide hardware locks that are used
35 * To achieve that, each physical lock must have a system-wide id number
37 * they're using the same hardware lock.
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| /Linux-v5.10/arch/arm/mach-omap2/ |
| 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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| 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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| 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
57 * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
58 * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
66 * omap_hwmod-based fine-grained module idle control is added.
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| /Linux-v5.10/Documentation/ABI/testing/ |
| D | sysfs-devices-power | 15 from sleep states, such as the memory sleep state (suspend to
19 Some devices support "wakeup" events, which are hardware signals
20 used to activate the system from a sleep state. Such devices
33 be enabled to wake up the system from sleep states.
40 space to control the run-time power management of the device.
61 with the main suspend/resume thread) during system-wide power
86 attribute is read-only. If the device is not capable to wake up
87 the system from sleep states, this attribute is not present.
88 If the device is not enabled to wake up the system from sleep
98 is read-only. If the device is not capable to wake up the
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| /Linux-v5.10/Documentation/devicetree/bindings/mfd/ |
| 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-v5.10/drivers/staging/media/atomisp/pci/runtime/debug/interface/ |
| D | ia_css_debug.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
107 /* Logging macros for non-API functions. These have a lower trace level */
162 /*! @brief Dump isp hardware state.
163 * Dumps the isp hardware state to tracing output.
168 /*! @brief Dump sp hardware state.
169 * Dumps the sp hardware state to tracing output.
175 /*! @brief Dump GAC hardware state.
176 * Dumps the GAC ACB hardware registers. may be useful for
182 /*! @brief Dump dma controller state.
183 * Dumps the dma controller state to tracing output.
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| /Linux-v5.10/Documentation/devicetree/bindings/soc/qcom/ |
| D | rpmh-rsc.txt | 2 ------------
10 The hardware block (Direct Resource Voter or DRV) is a part of the h/w entity
11 (Resource State Coordinator a.k.a RSC) that can handle multiple sleep and
17 have powered off to facilitate idle power saving. TCS could be classified as -
20 SLEEP /* Triggered by F/W */
24 The order in which they are described in the DT, should match the hardware
27 Requests can be made for the state of a resource, when the subsystem is active
28 or idle. When all subsystems like Modem, GPU, CPU are idle, the resource state
29 will be an aggregate of the sleep votes from each of those subsystems. Clients
30 may request a sleep value for their shared resources in addition to the active
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| /Linux-v5.10/drivers/acpi/acpica/ |
| 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 - 2020, 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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| 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 - 2020, 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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| /Linux-v5.10/arch/arm/mach-pxa/ |
| D | sleep.S | 2 * Low-level PXA250/210 sleep/wakeUp support
16 #include <mach/hardware.h>
18 #include <mach/pxa2xx-regs.h>
27 * pxa3xx_finish_suspend() - forces CPU into sleep state (S2D3C4)
31 mcr p14, 0, r0, c7, c0, 0 @ enter sleep
33 20: b 20b @ waiting for sleep
40 * Forces CPU into sleep state.
42 * r0 = value for PWRMODE M field for desired sleep state
45 @ Put the processor to sleep
48 @ prepare value for sleep mode
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| /Linux-v5.10/drivers/hwspinlock/ |
| D | hwspinlock_core.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * Hardware spinlock framework
5 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
7 * Contact: Ohad Ben-Cohen <ohad@wizery.com>
19 #include <linux/radix-tree.h>
36 * and provides easy-to-use API which makes the hwspinlock core code simple
54 * as the radix-tree API requires that users provide all synchronisation.
55 * A mutex is needed because we're using non-atomic radix tree allocations.
61 * __hwspin_trylock() - attempt to lock a specific hwspinlock
64 * @flags: a pointer where the caller's interrupt state will be saved at (if
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| /Linux-v5.10/Documentation/devicetree/bindings/thermal/ |
| D | rockchip-thermal.txt | 4 - compatible : should be "rockchip,<name>-tsadc"
5 "rockchip,px30-tsadc": found on PX30 SoCs
6 "rockchip,rv1108-tsadc": found on RV1108 SoCs
7 "rockchip,rk3228-tsadc": found on RK3228 SoCs
8 "rockchip,rk3288-tsadc": found on RK3288 SoCs
9 "rockchip,rk3328-tsadc": found on RK3328 SoCs
10 "rockchip,rk3368-tsadc": found on RK3368 SoCs
11 "rockchip,rk3399-tsadc": found on RK3399 SoCs
12 - reg : physical base address of the controller and length of memory mapped
14 - interrupts : The interrupt number to the cpu. The interrupt specifier format
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| /Linux-v5.10/tools/power/x86/turbostat/ |
| 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…
41 MSRs are read as 64-bits, u32 truncates the displayed value to 32-bits.
51 Any string that does not match a key-word above is used
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