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/Documentation/devicetree/bindings/soc/rockchip/
Dpower_domain.txt1 * Rockchip Power Domains
3 Rockchip processors include support for multiple power domains which can be
4 powered up/down by software based on different application scenes to save power.
6 Required properties for power domain controller:
8 "rockchip,px30-power-controller" - for PX30 SoCs.
9 "rockchip,rk3036-power-controller" - for RK3036 SoCs.
10 "rockchip,rk3066-power-controller" - for RK3066 SoCs.
11 "rockchip,rk3128-power-controller" - for RK3128 SoCs.
12 "rockchip,rk3188-power-controller" - for RK3188 SoCs.
13 "rockchip,rk3228-power-controller" - for RK3228 SoCs.
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/Documentation/devicetree/bindings/soc/mediatek/
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.txt. 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/mt2701-power.h
15 - include/dt-bindings/power/mt2712-power.h
16 - include/dt-bindings/power/mt7622-power.h
28 - #power-domain-cells: Must be 1
33 enabled before enabling certain power domains.
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/Documentation/devicetree/bindings/power/
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.
17 - #power-domain-cells : Number of cells in a PM domain specifier;
19 providing multiple PM domains (e.g. power controllers), but can be any value
23 - power-domains : A phandle and PM domain specifier as defined by bindings of
24 the power controller specified by phandle.
25 Some power domains might be powered from another power domain (or have
29 specified by this binding. More details about power domain specifier are
33 generic domain power state. The idle state definitions are
43 - operating-points-v2 : Phandles to the OPP tables of power domains provided by
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Dfsl,imx-gpcv2.txt1 Freescale i.MX General Power Controller v2
4 The i.MX7S/D General Power Control (GPC) block contains Power Gating
5 Control (PGC) for various power domains.
18 Power domains contained within GPC node are generic power domain
20 Documentation/devicetree/bindings/power/power_domain.txt, which are
21 described as subnodes of the power gating controller 'pgc' node,
26 - reg: Power domain index. Valid values are defined in
27 include/dt-bindings/power/imx7-power.h for fsl,imx7d-gpc and
28 include/dt-bindings/power/imx8m-power.h for fsl,imx8mq-gpc
30 - #power-domain-cells: Should be 0
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Dpd-samsung.txt1 * Samsung Exynos Power Domains
3 Exynos processors include support for multiple power domains which are used
4 to gate power to one or more peripherals on the processor.
8 * samsung,exynos4210-pd - for exynos4210 type power domain.
9 * samsung,exynos5433-pd - for exynos5433 type power domain.
12 - #power-domain-cells: number of cells in power domain specifier;
18 - power-domains: phandle pointing to the parent power domain, for more details
19 see Documentation/devicetree/bindings/power/power_domain.txt
25 Node of a device using power domains must have a power-domains property
26 defined with a phandle to respective power domain.
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Dfsl,imx-gpc.txt1 Freescale i.MX General Power Controller
4 The i.MX6 General Power Control (GPC) block contains DVFS load tracking
5 counters and Power Gating Control (PGC).
21 The power domains are generic power domain providers as documented in
22 Documentation/devicetree/bindings/power/power_domain.txt. They are described as
23 subnodes of the power gating controller 'pgc' node of the GPC and should
27 - reg: Must contain the DOMAIN_INDEX of this power domain
36 - #power-domain-cells: Should be 0
40 power-up sequencing to ensure reset propagation into devices located inside
41 this power domain
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Dqcom,rpmpd.txt1 Qualcomm RPM/RPMh Power domains
3 For RPM/RPMh Power domains, we communicate a performance state to RPM/RPMh
8 * qcom,msm8996-rpmpd: RPM Power domain for the msm8996 family of SoC
9 * qcom,msm8998-rpmpd: RPM Power domain for the msm8998 family of SoC
10 * qcom,qcs404-rpmpd: RPM Power domain for the qcs404 family of SoC
11 * qcom,sdm845-rpmhpd: RPMh Power domain for the sdm845 family of SoC
12 - #power-domain-cells: number of cells in Power domain specifier
14 - operating-points-v2: Phandle to the OPP table for the Power domain.
15 Refer to Documentation/devicetree/bindings/power/power_domain.txt
18 Refer to <dt-bindings/power/qcom-rpmpd.h> for the level values for
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/Documentation/hwmon/
Docc.rst15 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.
77 power[1-n]_input
78 Latest measured power reading of the component in
80 power[1-n]_average
81 Average power of the component in microwatts.
82 power[1-n]_average_interval
83 The amount of time over which the power average
86 [with power sensor version < 2]
88 power[1-n]_label
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Dacpi_power_meter.rst4 This driver talks to ACPI 4.0 power meters.
19 This driver implements sensor reading support for the power meters exposed in
21 features--a power meter that returns average power use over a configurable
23 sysfs interface conforms with the specification outlined in the "Power" section
29 The `power[1-*]_is_battery` knob indicates if the power supply is a battery.
30 Both `power[1-*]_average_{min,max}` must be set before the trip points will work.
33 `power[1-*]_average` sysfs file.
35 The `power[1-*]_{model_number, serial_number, oem_info}` fields display
39 Some computers have the ability to enforce a power cap in hardware. If this is
40 the case, the `power[1-*]_cap` and related sysfs files will appear. When the
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Dfam15h_power.rst25 1) Processor TDP (Thermal design power)
27 Given a fixed frequency and voltage, the power consumption of a
28 processor varies based on the workload being executed. Derated power
29 is the power consumed when running a specific application. Thermal
30 design power (TDP) is an example of derated power.
32 This driver permits reading of registers providing power information
35 For AMD Family 15h and 16h processors the following power values can
40 Specifies in watts the maximum amount of power
44 Specifies in watts the maximum amount of power
47 Specifies in watts the current amount of power being
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Dlochnagar.rst30 power1_average Measured average power for DBVDD1 (microWatts)
31 power1_average_interval Power averaging time input valid from 1 to 1708mS
37 power2_average Measured average power for 1V8 DSP (microWatts)
38 power2_average_interval Power averaging time input valid from 1 to 1708mS
44 power3_average Measured average power for 1V8 CDC (microWatts)
45 power3_average_interval Power averaging time input valid from 1 to 1708mS
51 power4_average Measured average power for VDDCORE DSP (microWatts)
52 power4_average_interval Power averaging time input valid from 1 to 1708mS
58 power5_average Measured average power for AVDD 1V8 (microWatts)
59 power5_average_interval Power averaging time input valid from 1 to 1708mS
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/Documentation/ABI/testing/
Dsysfs-class-powercap6 The powercap/ class sub directory belongs to the power cap
8 Documentation/power/powercap/powercap.rst for details.
16 Here <control type> determines how the power is going to be
17 controlled. A <control type> can contain multiple power zones.
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>
32 A power zone is a single or a collection of devices, which can
33 be independently monitored and controlled. A power zone sysfs
37 What: /sys/class/powercap/<control type>/<power zone>/<child power zone>
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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
24 What: /sys/power/mem_sleep
28 The /sys/power/mem_sleep file controls the operating mode of
32 to suspend the system (by writing "mem" to the /sys/power/state
42 What: /sys/power/disk
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/Documentation/power/powercap/
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
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
21 given zone belongs to. They each contain attributes for monitoring power, as
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/Documentation/devicetree/bindings/soc/bcm/
Draspberrypi,bcm2835-power.txt1 Raspberry Pi power domain driver
5 - compatible: Should be "raspberrypi,bcm2835-power".
7 - #power-domain-cells: Should be <1>, we providing multiple power domains.
9 The valid defines for power domain are:
37 power: power {
38 compatible = "raspberrypi,bcm2835-power";
40 #power-domain-cells = <1>;
43 Example for using power domain:
46 power-domains = <&power RPI_POWER_DOMAIN_USB>;
Dbrcm,bcm2835-pm.txt1 BCM2835 PM (Power domains, watchdog)
3 The PM block controls power domains and some reset lines, and includes
19 - #power-domain-cells: Should be 1. This property follows the power domain
25 - system-power-controller: Whether the watchdog is controlling the
26 system power. This node follows the power controller bindings[3].
29 [2] Documentation/devicetree/bindings/power/power_domain.txt
30 [3] Documentation/devicetree/bindings/power/power-controller.txt
36 #power-domain-cells = <1>;
45 system-power-controller;
/Documentation/devicetree/bindings/mfd/
Dtwl4030-power.txt1 Texas Instruments TWL family (twl4030) reset and power management module
3 The power management module inside the TWL family provides several facilities
4 to control the power resources, including power scripts. For now, the
9 "ti,twl4030-power"
10 "ti,twl4030-power-reset"
11 "ti,twl4030-power-idle"
12 "ti,twl4030-power-idle-osc-off"
14 The use of ti,twl4030-power-reset is recommended at least on
17 When using ti,twl4030-power-idle, the TI recommended configuration
20 When using ti,twl4030-power-idle-osc-off, the TI recommended
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Dmax77620.txt1 MAX77620 Power management IC from Maxim Semiconductor.
21 - system-power-controller: Indicates that this PMIC is controlling the
22 system power, see [1] for more details.
24 [1] Documentation/devicetree/bindings/power/power-controller.txt
29 Flexible power sequence configurations:
31 The Flexible Power Sequencer (FPS) allows each regulator to power up under
32 hardware or software control. Additionally, each regulator can power on
33 independently or among a group of other regulators with an adjustable power-up
34 and power-down delays (sequencing). GPIO1, GPIO2, and GPIO3 can be programmed
46 Each regulator, GPIO1, GPIO2, GPIO3, and 32KHz clock has a flexible power
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/Documentation/sound/designs/
Dpowersave.rst2 Notes on Power-Saving Mode
5 AC97 and HD-audio drivers have the automatic power-saving mode.
9 With the automatic power-saving, the driver turns off the codec power
11 the device and/or no analog loopback is set, the power disablement is
12 done fully or partially. It'll save a certain power consumption, thus
15 The time-out for automatic power-off can be specified via ``power_save``
18 power-saving. The default value of timeout is given via
27 automatic power-save mode with 10 seconds, write to
34 Note that you might hear click noise/pop when changing the power
36 power-down to the active state. These are often hardly to fix, so
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/Documentation/power/regulator/
Doverview.rst11 The intention is to allow systems to dynamically control regulator power output
12 in order to save power and prolong battery life. This applies to both voltage
27 - Electronic device that supplies power to other devices.
35 - Power Management IC. An IC that contains numerous
40 - Electronic device that is supplied power by a regulator.
45 power supply. Its supply voltage is set by the hardware,
52 - Power Domain
53 - Electronic circuit that is supplied its input power by the
54 output power of a regulator, switch or by another power
65 That is one regulator and three power domains:
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/Documentation/devicetree/bindings/arm/tegra/
Dnvidia,tegra20-pmc.txt1 NVIDIA Tegra Power Management Controller (PMC)
3 == Power Management Controller Node ==
5 The PMC block interacts with an external Power Management Unit. The PMC
7 modes. It provides power-gating controllers for SoC and CPU power-islands.
27 The PMU is an external Power Management Unit, whose interrupt output
36 - nvidia,core-power-req-active-high : Boolean, core power request active-high
38 - nvidia,combined-power-req : Boolean, combined power request for CPU & Core
39 - nvidia,cpu-pwr-good-en : Boolean, CPU power good signal (from PMIC to PMC)
43 - nvidia,cpu-pwr-good-time : CPU power good time in uS.
44 - nvidia,cpu-pwr-off-time : CPU power off time in uS.
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/Documentation/driver-api/thermal/
Dpower_allocator.rst2 Power allocator governor tunables
22 The power allocator governor implements a
24 temperature as the control input and power as the controlled output:
48 | S |-----+----->| sum e |----->| X |--->| S |-->| S |-->|power |
60 Sustainable power
63 An estimate of the sustainable dissipatable power (in mW) should be
65 sustained power that can be dissipated at the desired control
66 temperature. This is the maximum sustained power for allocation at
67 the desired maximum temperature. The actual sustained power can vary
72 the thermal ramp. For reference, the sustainable power of a 4" phone
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/Documentation/devicetree/bindings/sound/
Dst,sta350.txt12 - power-down-gpios: a GPIO spec for the power down pin. If specified,
23 0: 2-channel (full-bridge) power, 2-channel data-out
24 1: 2 (half-bridge). 1 (full-bridge) on-board power
25 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX
48 - st,ffx-power-output-mode: string
49 The FFX power output mode selects how the FFX output timing is
53 - "full-power-mode"
57 Only required for "st,ffx-power-output-mode" ==
66 - st,max-power-use-mpcc:
70 - st,max-power-corr:
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/Documentation/devicetree/bindings/power/supply/
Daxp20x_usb_power.txt1 AXP20x USB power supply
4 -compatible: One of: "x-powers,axp202-usb-power-supply"
5 "x-powers,axp221-usb-power-supply"
6 "x-powers,axp223-usb-power-supply"
7 "x-powers,axp813-usb-power-supply"
10 variations such as the former being able to set the VBUS power supply max
38 usb-power-supply: usb-power-supply {
39 compatible = "x-powers,axp202-usb-power-supply";
/Documentation/devicetree/bindings/connector/
Dusb-connector.txt17 - self-powered: Set this property if the usb device that has its own power
35 - power-role: should be one of "source", "sink" or "dual"(DRP) if typec
36 connector has power support.
37 - try-power-role: preferred power role if "dual"(DRP) can support Try.SNK
42 Required properties for usb-c-connector with power delivery support:
43 - source-pdos: An array of u32 with each entry providing supported power
45 in "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.2
47 the PD spec chapter 6.4.1. Required for power source and power dual role.
50 - sink-pdos: An array of u32 with each entry providing supported power
52 in "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.3
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