| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/power/ |
| D | domain-idle-state.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/domain-idle-state.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: PM Domain Idle States binding description
10 - Ulf Hansson <ulf.hansson@linaro.org>
13 A domain idle state node represents the state parameters that will be used to
14 select the state when there are no active components in the PM domain.
18 const: domain-idle-states
21 "^(cpu|cluster|domain)-":
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| D | power-domain.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/power-domain.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rafael J. Wysocki <rjw@rjwysocki.net>
11 - Kevin Hilman <khilman@kernel.org>
12 - Ulf Hansson <ulf.hansson@linaro.org>
19 This device tree binding can be used to bind PM domain consumer devices with
20 their PM domains provided by PM domain providers. A PM domain provider can be
23 phandle arguments (so called PM domain specifiers) of length specified by the
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/power/ |
| D | power_domain.txt | 7 This device tree binding can be used to bind PM domain consumer devices with
8 their PM domains provided by PM domain providers. A PM domain provider can be
11 phandle arguments (so called PM domain specifiers) of length specified by the
12 #power-domain-cells property in the PM domain provider node.
14 ==PM domain providers==
17 - #power-domain-cells : Number of cells in a PM domain specifier;
18 Typically 0 for nodes representing a single PM domain and 1 for nodes
23 - power-domains : A phandle and PM domain specifier as defined by bindings of
25 Some power domains might be powered from another power domain (or have
27 a standard PM domain consumer binding is used. When provided, all domains
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| D | domain-idle-state.txt | 1 PM Domain Idle State Node:
3 A domain idle state node represents the state parameters that will be used to
4 select the state when there are no active components in the domain.
6 The state node has the following parameters -
8 - compatible:
11 Definition: Must be "domain-idle-state".
13 - entry-latency-us
15 Value type: <prop-encoded-array>
17 microseconds required to enter the idle state.
18 The exit-latency-us duration may be guaranteed
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/arm/ |
| D | psci.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Power State Coordination Interface (PSCI)
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
14 ARM DEN 0022A ("Power State Coordination Interface System Software on ARM
15 processors") can be used by Linux to initiate various CPU-centric power
25 r0 => 32-bit Function ID / return value
26 {r1 - r3} => Parameters
31 [2] Power State Coordination Interface (PSCI) specification
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| /kernel/linux/linux-5.10/Documentation/trace/coresight/ |
| D | coresight-cpu-debug.rst | 9 ------------
11 Coresight CPU debug module is defined in ARMv8-a architecture reference manual
13 debug module and it is mainly used for two modes: self-hosted debug and
16 explore debugging method which rely on self-hosted debug mode, this document
19 The debug module provides sample-based profiling extension, which can be used
20 to sample CPU program counter, secure state and exception level, etc; usually
21 every CPU has one dedicated debug module to be connected. Based on self-hosted
29 --------------
31 - During driver registration, it uses EDDEVID and EDDEVID1 - two device ID
32 registers to decide if sample-based profiling is implemented or not. On some
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| /kernel/linux/linux-4.19/Documentation/trace/ |
| D | coresight-cpu-debug.txt | 8 ------------
10 Coresight CPU debug module is defined in ARMv8-a architecture reference manual
12 debug module and it is mainly used for two modes: self-hosted debug and
15 explore debugging method which rely on self-hosted debug mode, this document
18 The debug module provides sample-based profiling extension, which can be used
19 to sample CPU program counter, secure state and exception level, etc; usually
20 every CPU has one dedicated debug module to be connected. Based on self-hosted
28 --------------
30 - During driver registration, it uses EDDEVID and EDDEVID1 - two device ID
31 registers to decide if sample-based profiling is implemented or not. On some
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| D | events-power.rst | 8 - 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"
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| /kernel/linux/linux-5.10/drivers/cpuidle/ |
| D | cpuidle-psci.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * PSCI CPU idle driver.
28 #include "cpuidle-psci.h"
40 void psci_set_domain_state(u32 state) in psci_set_domain_state() argument
42 __this_cpu_write(domain_state, state); in psci_set_domain_state()
50 static inline int psci_enter_state(int idx, u32 state) in psci_enter_state() argument
52 return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, idx, state); in psci_enter_state()
59 u32 *states = data->psci_states; in psci_enter_domain_idle_state()
60 struct device *pd_dev = data->dev; in psci_enter_domain_idle_state()
61 u32 state; in psci_enter_domain_idle_state() local
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| D | cpuidle-psci-domain.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * PM domains for CPUs via genpd - managed by cpuidle-psci.
22 #include "cpuidle-psci.h"
34 struct genpd_power_state *state = &pd->states[pd->state_idx]; in psci_pd_power_off() local
37 if (!state->data) in psci_pd_power_off()
41 return -EBUSY; in psci_pd_power_off()
43 /* OSI mode is enabled, set the corresponding domain state. */ in psci_pd_power_off()
44 pd_state = state->data; in psci_pd_power_off()
64 ret = -ENOMEM; in psci_pd_parse_state_nodes()
74 i--; in psci_pd_parse_state_nodes()
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| /kernel/linux/linux-5.10/arch/arm/mach-omap2/ |
| D | pm33xx-core.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2016-2018 Texas Instruments Incorporated - https://www.ti.com/
18 #include <linux/platform_data/gpio-omap.h>
34 #include "omap-secure.h"
53 return -ENOMEM; in am43xx_map_scu()
61 pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n"); in am33xx_check_off_mode_enable()
70 * Check for am437x-gp-evm which has the right Hardware design to in am43xx_check_off_mode_enable()
73 if (of_machine_is_compatible("ti,am437x-gp-evm") && enable_off_mode) in am43xx_check_off_mode_enable()
76 pr_warn("WARNING: This platform does not support off-mode, entering DeepSleep suspend.\n"); in am43xx_check_off_mode_enable()
81 static int amx3_common_init(int (*idle)(u32 wfi_flags)) in amx3_common_init()
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| D | clockdomain.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
6 * Copyright (C) 2008-2011 Nokia Corporation
29 * CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and
31 * the PRCM when determining whether the clockdomain is idle.
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
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
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| /kernel/linux/linux-4.19/arch/arm/mach-omap2/ |
| D | clockdomain.h | 5 * Copyright (C) 2008-2011 Nokia Corporation
32 * CLKDM_MISSING_IDLE_REPORTING: The idle status of the IP blocks and
34 * the PRCM when determining whether the clockdomain is idle.
36 * hardware-supervised idle mode, the PRCM may transition the
37 * enclosing powerdomain to a low power state, even when devices
41 * force-sleep mode, then the HW_AUTO mode will be used to put the
43 * the force-wakeup mode, then it will be used whenever a clock or
60 * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
61 * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
69 * omap_hwmod-based fine-grained module idle control is added.
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| /kernel/linux/linux-5.10/Documentation/ABI/testing/ |
| D | sysfs-class-regulator | 1 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
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| /kernel/linux/linux-4.19/Documentation/ABI/testing/ |
| D | sysfs-class-regulator | 1 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.
43 idle
52 "error" indicates an out-of-regulation status such as being
56 "fast", "normal", "idle", and "standby" are all detailed
98 measured in microvolts (i.e. E-6 Volts), for regulators
113 setting measured in microamps (i.e. E-6 Amps), for regulators
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| /kernel/linux/linux-5.10/kernel/ |
| D | cpu_pm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
18 * Notifications for cpu_pm will be issued by the idle task itself, which can
35 * disfunctional in cpu idle. Copy RCU_NONIDLE code to let RCU know in cpu_pm_notify()
62 * cpu_pm_register_notifier - register a driver with cpu_pm
83 * cpu_pm_unregister_notifier - unregister a driver with cpu_pm
103 * cpu_pm_enter - CPU low power entry notifier
105 * Notifies listeners that a single CPU is entering a low power state that may
106 * cause some blocks in the same power domain as the cpu to reset.
111 * co-processor, interrupt controller and its PM extensions, local CPU
124 * cpu_pm_exit - CPU low power exit notifier
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| /kernel/linux/linux-5.10/Documentation/trace/ |
| D | events-power.rst | 8 - 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"
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/arm/msm/ |
| D | qcom,idle-state.txt | 1 QCOM Idle States for cpuidle driver
3 ARM provides idle-state node to define the cpuidle states, as defined in [1].
4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
5 states. Idle states have different enter/exit latency and residency values.
6 The idle states supported by the QCOM SoC are defined as -
16 trigger to execute the SPM state machine. The SPM state machine waits for the
18 hierarchy to enter standby states, when all cpus are idle. An interrupt brings
19 the SPM state machine out of its wait, the next step is to ensure that the
21 execution. This state is defined as a generic ARM WFI state by the ARM cpuidle
22 driver and is not defined in the DT. The SPM state machine should be
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/arm/msm/ |
| D | qcom,idle-state.txt | 1 QCOM Idle States for cpuidle driver
3 ARM provides idle-state node to define the cpuidle states, as defined in [1].
4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
5 states. Idle states have different enter/exit latency and residency values.
6 The idle states supported by the QCOM SoC are defined as -
16 trigger to execute the SPM state machine. The SPM state machine waits for the
18 hierarchy to enter standby states, when all cpus are idle. An interrupt brings
19 the SPM state machine out of its wait, the next step is to ensure that the
21 execution. This state is defined as a generic ARM WFI state by the ARM cpuidle
22 driver and is not defined in the DT. The SPM state machine should be
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| /kernel/linux/linux-5.10/include/linux/ |
| D | cpu_pm.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
16 * When a CPU goes to a low power state that turns off power to the CPU's
17 * power domain, the contents of some blocks (floating point coprocessors,
18 * interrupt controllers, caches, timers) in the same power domain can
19 * be lost. The cpm_pm notifiers provide a method for platform idle, suspend,
29 * CPU. They are used to save per-cpu context for affected blocks.
31 * CPU cluster notifications apply to all CPUs in a single power domain. They
33 * after all the CPUs in the power domain have been notified of the low power
34 * state.
41 /* A single cpu is entering a low power state */
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| /kernel/linux/linux-5.10/drivers/base/power/ |
| D | domain_governor.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain_governor.c - Governors for device PM domains.
20 if (dev->power.subsys_data && dev->power.subsys_data->domain_data) { in dev_update_qos_constraint()
22 * Only take suspend-time QoS constraints of devices into in dev_update_qos_constraint()
28 constraint_ns = dev_gpd_data(dev)->td.effective_constraint_ns; in dev_update_qos_constraint()
31 * The child is not in a domain and there's no info on its in dev_update_qos_constraint()
47 * default_suspend_ok - Default PM domain governor routine to suspend devices.
52 struct gpd_timing_data *td = &dev_gpd_data(dev)->td; in default_suspend_ok()
58 spin_lock_irqsave(&dev->power.lock, flags); in default_suspend_ok()
60 if (!td->constraint_changed) { in default_suspend_ok()
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| D | domain.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain.c - Common code related to device power domains.
34 __routine = genpd->dev_ops.callback; \
53 mutex_lock(&genpd->mlock); in genpd_lock_mtx()
59 mutex_lock_nested(&genpd->mlock, depth); in genpd_lock_nested_mtx()
64 return mutex_lock_interruptible(&genpd->mlock); in genpd_lock_interruptible_mtx()
69 return mutex_unlock(&genpd->mlock); in genpd_unlock_mtx()
80 __acquires(&genpd->slock) in genpd_lock_spin()
84 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_spin()
85 genpd->lock_flags = flags; in genpd_lock_spin()
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| /kernel/linux/linux-4.19/include/linux/ |
| D | cpu_pm.h | 25 * When a CPU goes to a low power state that turns off power to the CPU's
26 * power domain, the contents of some blocks (floating point coprocessors,
27 * interrupt controllers, caches, timers) in the same power domain can
28 * be lost. The cpm_pm notifiers provide a method for platform idle, suspend,
38 * CPU. They are used to save per-cpu context for affected blocks.
40 * CPU cluster notifications apply to all CPUs in a single power domain. They
42 * after all the CPUs in the power domain have been notified of the low power
43 * state.
50 /* A single cpu is entering a low power state */
53 /* A single cpu failed to enter a low power state */
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| /kernel/linux/linux-4.19/include/xen/interface/io/ |
| D | tpmif.h | 6 * This file is in the public domain.
14 * Xenbus state machine
19 * 3. Frontend populates ring-ref, event-channel, feature-protocol-v2
21 * 5. Backend maps grant and event channel, verifies feature-protocol-v2
23 * 7. Frontend verifies feature-protocol-v2, transitions to Connected
26 * 1. State is changed to XenbusStateClosing
28 * 3. Backend unmaps grant and event, changes state to InitWait
32 VTPM_STATE_IDLE, /* no contents / vTPM idle / cancel complete */
34 VTPM_STATE_FINISH, /* response ready / vTPM idle */
37 /* The backend should only change state to IDLE or FINISH, while the
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| /kernel/linux/linux-5.10/include/xen/interface/io/ |
| D | tpmif.h | 6 * This file is in the public domain.
14 * Xenbus state machine
19 * 3. Frontend populates ring-ref, event-channel, feature-protocol-v2
21 * 5. Backend maps grant and event channel, verifies feature-protocol-v2
23 * 7. Frontend verifies feature-protocol-v2, transitions to Connected
26 * 1. State is changed to XenbusStateClosing
28 * 3. Backend unmaps grant and event, changes state to InitWait
32 VTPM_STATE_IDLE, /* no contents / vTPM idle / cancel complete */
34 VTPM_STATE_FINISH, /* response ready / vTPM idle */
37 /* The backend should only change state to IDLE or FINISH, while the
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