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/linux/Documentation/devicetree/bindings/power/
H A Drockchip,power-controller.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/rockchip,power-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Rockchip Power Domains
10 - Elaine Zhang <zhangqing@rock-chips.com>
11 - Heiko Stuebner <heiko@sntech.de>
14 Rockchip processors include support for multiple power domains
16 application scenarios to save power.
18 Power domains contained within power-controller node are
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H A Dmediatek,power-controller.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/power/mediatek,power-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Mediatek Power Domains Controller
10 - MandyJH Liu <mandyjh.liu@mediatek.com>
11 - Matthias Brugger <mbrugger@suse.com>
14 Mediatek processors include support for multiple power domains which can be
15 powered up/down by software based on different application scenes to save power.
17 IP cores belonging to a power domain should contain a 'power-domains'
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H A Dfsl,imx-gpcv2.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/power/fsl,imx-gpcv2.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Freescale i.MX General Power Controller v2
10 - Andrey Smirnov <andrew.smirnov@gmail.com>
13 The i.MX7S/D General Power Control (GPC) block contains Power Gating
14 Control (PGC) for various power domains.
16 Power domains contained within GPC node are generic power domain
18 Documentation/devicetree/bindings/power/power-domain.yaml, which are
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H A Dpower-domain.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/power-domain.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rafael J. Wysocki <rjw@rjwysocki.net>
11 - Kevin Hilman <khilman@kernel.org>
12 - Ulf Hansson <ulf.hansson@linaro.org>
16 used for power gating of selected IP blocks for power saving by reduced
25 \#power-domain-cells property in the PM domain provider node.
29 pattern: "^(power-controller|power-domain|performance-domain)([@-].*)?$"
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H A Dpower_domain.txt4 used for power gating of selected IP blocks for power saving by reduced leakage
12 #power-domain-cells property in the PM domain provider node.
16 See power-domain.yaml.
21 - power-domains : A list of PM domain specifiers, as defined by bindings of
22 the power controller that is the PM domain provider.
25 - power-domain-names : A list of power domain name strings sorted in the same
26 order as the power-domains property. Consumers drivers will use
27 power-domain-names to match power domains with power-domains
32 leaky-device@12350000 {
33 compatible = "foo,i-leak-current";
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H A Dapple,pmgr-pwrstate.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/power/apple,pmgr-pwrstate.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Apple SoC PMGR Power States
10 - Hector Martin <marcan@marcan.st>
13 - $ref: power-domain.yaml#
16 Apple SoCs include PMGR blocks responsible for power management,
17 which can control various clocks, resets, power states, and
18 performance features. This binding describes the device power
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/linux/arch/arm64/boot/dts/apple/
H A Dt8112-pmgr.dtsi1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
3 * PMGR Power domains for the Apple T8112 "M2" SoC
10 ps_sbr: power-controller@100 {
11 compatible = "apple,t8112-pmgr-pwrstate", "apple,pmgr-pwrstate";
13 #power-domain-cells = <0>;
14 #reset-cells = <0>;
16 apple,always-on; /* Core device */
19 ps_aic: power-controller@108 {
20 compatible = "apple,t8112-pmgr-pwrstate", "apple,pmgr-pwrstate";
22 #power-domain-cells = <0>;
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H A Dt8103-pmgr.dtsi1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
3 * PMGR Power domains for the Apple T8103 "M1" SoC
10 ps_sbr: power-controller@100 {
11 compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
13 #power-domain-cells = <0>;
14 #reset-cells = <0>;
16 apple,always-on; /* Core device */
19 ps_aic: power-controller@108 {
20 compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
22 #power-domain-cells = <0>;
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H A Dt600x-pmgr.dtsi1 // SPDX-License-Identifier: GPL-2.0+ OR MIT
3 * PMGR Power domains for the Apple T6001 "M1 Max" SoC
9 DIE_NODE(ps_pms_bridge): power-controller@100 {
10 compatible = "apple,t6000-pmgr-pwrstate", "apple,pmgr-pwrstate";
12 #power-domain-cells = <0>;
13 #reset-cells = <0>;
15 apple,always-on; /* Core device */
18 DIE_NODE(ps_aic): power-controller@108 {
19 compatible = "apple,t6000-pmgr-pwrstate", "apple,pmgr-pwrstate";
21 #power-domain-cells = <0>;
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/linux/Documentation/devicetree/bindings/clock/
H A Dfsl,imx8-acm.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/clock/fsl,imx8-acm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Shengjiu Wang <shengjiu.wang@nxp.com>
19 - fsl,imx8dxl-acm
20 - fsl,imx8qm-acm
21 - fsl,imx8qxp-acm
26 power-domains:
30 '#clock-cells':
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/linux/drivers/base/power/
H A Druntime.c1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/runtime.c - Helper functions for device runtime PM
18 #include "power.h"
27 if (dev->pm_domain) in __rpm_get_callback()
28 ops = &dev->pm_domain->ops; in __rpm_get_callback()
29 else if (dev->type && dev->type->pm) in __rpm_get_callback()
30 ops = dev->type->pm; in __rpm_get_callback()
31 else if (dev->class && dev->class->pm) in __rpm_get_callback()
32 ops = dev->class->pm; in __rpm_get_callback()
33 else if (dev->bus && dev->bus->pm) in __rpm_get_callback()
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/linux/Documentation/devicetree/bindings/soc/mediatek/
H A Dscpsys.txt4 The System Control Processor System (SCPSYS) has several power management
7 The System Power Manager (SPM) inside the SCPSYS is for the MTCMOS power
11 power/power-domain.yaml. It provides the power domains defined in
12 - include/dt-bindings/power/mt8173-power.h
13 - include/dt-bindings/power/mt6797-power.h
14 - include/dt-bindings/power/mt6765-power.h
15 - include/dt-bindings/power/mt2701-power.h
16 - include/dt-bindings/power/mt2712-power.h
17 - include/dt-bindings/power/mt7622-power.h
20 - compatible: Should be one of:
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/linux/drivers/power/supply/
H A Daxp20x_usb_power.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * AXP20x PMIC USB power supply status driver
6 * Copyright (C) 2014 Bruno Prémont <bonbons@linux-vserver.org>
11 #include <linux/devm-helpers.h>
26 #define DRVNAME "axp20x-usb-power-supply"
76 struct axp20x_usb_power *power);
77 int (*axp20x_cfg_adc_reg)(struct axp20x_usb_power *power);
101 static bool axp20x_usb_vbus_needs_polling(struct axp20x_usb_power *power) in axp20x_usb_vbus_needs_polling() argument
105 * present->absent transition implies an online->offline transition in axp20x_usb_vbus_needs_polling()
108 if (power->axp_data->vbus_needs_polling && !power->online) in axp20x_usb_vbus_needs_polling()
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H A Daxp20x_ac_power.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * AXP20X and AXP22X PMICs' ACIN power supply driver
6 * Quentin Schulz <quentin.schulz@free-electrons.com>
30 #define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)
35 #define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3)
39 #define DRVNAME "axp20x-ac-power-supply"
53 struct axp20x_ac_power *power = devid; in axp20x_ac_power_irq() local
55 power_supply_changed(power->supply); in axp20x_ac_power_irq()
64 struct axp20x_ac_power *power = power_supply_get_drvdata(psy); in axp20x_ac_power_get_property() local
69 ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, &reg); in axp20x_ac_power_get_property()
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/linux/drivers/staging/nvec/
H A Dnvec_power.c1 // SPDX-License-Identifier: GPL-2.0
3 * nvec_power: power supply driver for a NVIDIA compliant embedded controller
87 struct nvec_power *power = in nvec_power_notifier() local
94 if (res->sub_type == 0) { in nvec_power_notifier()
95 if (power->on != res->plu) { in nvec_power_notifier()
96 power->on = res->plu; in nvec_power_notifier()
109 static void get_bat_mfg_data(struct nvec_power *power) in get_bat_mfg_data() argument
116 nvec_write_async(power->nvec, buf, 2); in get_bat_mfg_data()
123 struct nvec_power *power = in nvec_power_bat_notifier() local
131 switch (res->sub_type) { in nvec_power_bat_notifier()
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/linux/drivers/net/ipa/
H A Dipa_power.c1 // SPDX-License-Identifier: GPL-2.0
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4 * Copyright (C) 2018-2024 Linaro Ltd.
23 * DOC: IPA Power Management
26 * interconnects (buses) it depends on are enabled. Runtime power
38 * struct ipa_power - IPA power management information
54 static int ipa_interconnect_init(struct ipa_power *power, in ipa_interconnect_init() argument
62 interconnect = &power->interconnect[0]; in ipa_interconnect_init()
63 for (i = 0; i < power->interconnect_count; i++) { in ipa_interconnect_init()
64 /* interconnect->path is filled in by of_icc_bulk_get() */ in ipa_interconnect_init()
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/linux/Documentation/power/powercap/
H A Dpowercap.rst2 Power Capping Framework
5 The power capping framework provides a consistent interface between the kernel
6 and the user space that allows power capping drivers to expose the settings to
12 The framework exposes power capping devices to user space via sysfs in the
14 'control types', which correspond to different methods of power capping. For
15 example, the intel-rapl control type represents the Intel "Running Average
16 Power Limit" (RAPL) technology, whereas the 'idle-injection' control type
17 corresponds to the use of idle injection for controlling power.
19 Power zones represent different parts of the system, which can be controlled and
20 monitored using the power capping method determined by the control type the
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H A Ddtpm.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Dynamic Thermal Power Management framework
12 Another aspect is to sustain the performance for a given power budget,
15 reduce the battery charging because the dissipated power is too high
16 compared with the power consumed by other devices.
19 different devices by limiting their power given an application
22 The Dynamic Thermal Power Management (DTPM) is a technique acting on
23 the device power by limiting and/or balancing a power budget among
27 device power.
34 driver to do the connection with the power manageable device.
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/linux/Documentation/hwmon/
H A Docc.rst1 Kernel driver occ-hwmon
12 -----------
14 This driver supports hardware monitoring for the On-Chip Controller (OCC)
15 embedded on POWER processors. The OCC is a device that collects and aggregates
17 sensor data as well as perform thermal and power management on the system.
20 manually if an "ibm,p8-occ-hwmon" compatible device is found under the
21 appropriate I2C bus node in the device-tree.
23 The P9 version of this driver is a client driver of the FSI-based OCC driver.
24 It will be probed automatically by the FSI-based OCC driver.
27 -------------
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/linux/drivers/pmdomain/bcm/
H A Dbcm2835-power.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Power domain driver for Broadcom BCM2835
8 #include <dt-bindings/soc/bcm2835-pm.h>
12 #include <linux/mfd/bcm2835-pm.h>
16 #include <linux/reset-controller.h>
61 /* The power gates must be enabled with this bit before enabling the LDO in the
109 #define PM_READ(reg) readl(power->base + (reg))
110 #define PM_WRITE(reg, val) writel(PM_PASSWORD | (val), power->base + (reg))
133 struct bcm2835_power *power; member
152 static int bcm2835_asb_control(struct bcm2835_power *power, u32 reg, bool enable) in bcm2835_asb_control() argument
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/linux/Documentation/ABI/testing/
H A Dsysfs-power1 What: /sys/power/
5 The /sys/power directory will contain files that will
6 provide a unified interface to the power management
9 What: /sys/power/state
13 The /sys/power/state file controls system sleep states.
15 labels, which may be "mem" (suspend), "standby" (power-on
16 suspend), "freeze" (suspend-to-idle) and "disk" (hibernation).
21 See Documentation/admin-guide/pm/sleep-states.rst for more
24 What: /sys/power/mem_sleep
28 The /sys/power/mem_sleep file controls the operating mode of
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H A Dsysfs-class-powercap4 Contact: linux-pm@vger.kernel.org
6 The powercap/ class sub directory belongs to the power cap
8 Documentation/power/powercap/powercap.rst for details.
13 Contact: linux-pm@vger.kernel.org
16 Here <control type> determines how the power is going to be
17 controlled. A <control type> can contain multiple power zones.
22 Contact: linux-pm@vger.kernel.org
24 This allows to enable/disable power capping for a "control type".
25 This status affects every power zone using this "control_type.
27 What: /sys/class/powercap/<control type>/<power zone>
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/linux/arch/arm64/boot/dts/arm/
H A Djuno-scmi.dtsi3 power-domains = <&scmi_devpd 8>;
7 power-domains = <&scmi_devpd 8>;
11 power-domains = <&scmi_devpd 8>;
15 power-domains = <&scmi_devpd 8>;
19 power-domains = <&scmi_devpd 8>;
23 power-domains = <&scmi_devpd 8>;
27 power-domains = <&scmi_devpd 8>;
31 power-domains = <&scmi_devpd 8>;
42 /delete-node/ scpi;
47 mbox-names = "tx", "rx";
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/linux/arch/powerpc/boot/dts/fsl/
H A De6500_power_isa.dtsi2 * e6500 Power ISA Device Tree Source (include)
37 power-isa-version = "2.06";
38 power-isa-b; // Base
39 power-isa-e; // Embedded
40 power-isa-atb; // Alternate Time Base
41 power-isa-cs; // Cache Specification
42 power-isa-ds; // Decorated Storage
43 power-isa-e.ed; // Embedded.Enhanced Debug
44 power-isa-e.pd; // Embedded.External PID
45 power-isa-e.hv; // Embedded.Hypervisor
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/linux/Documentation/devicetree/bindings/arm/apple/
H A Dapple,pmgr.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Apple SoC Power Manager (PMGR)
10 - Hector Martin <marcan@marcan.st>
13 Apple SoCs include PMGR blocks responsible for power management,
14 which can control various clocks, resets, power states, and
16 with sub-nodes representing individual features.
20 pattern: "^power-management@[0-9a-f]+$"
24 - enum:
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