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incubator-nuttx/drivers/power/pm/Kconfig

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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
menuconfig PM
bool "Power management (PM) system"
default n
---help---
Power management (PM) system. It consists of an OS interface
to board logic which can be used to obtain a recommended
power level according to a power management policy set by the
currently chosen PM governor. It is also used by drivers which
can allow or not a power level to be changed or not.
if PM
config PM_NDOMAINS
int "Number of PM activity domains"
default 1
---help---
Defines the number of "domains" that the PM system can control.
For example, you may want to separately manage the power from the
Network domain, shutting down the network when it is not be used,
from the UI domain, shutting down the UI when it is not in use.
config PM_PROCFS
bool "PM proc fs support"
depends on FS_PROCFS_REGISTER
---help---
Enable procfs for pm.
config PM_RUNTIME
bool "PM runtime support"
default n
---help---
Enable PM runtime that can suspend/resume device by driver
when system is running. If the device is not used, you can use
PM rutime interface to suspend the device. When the device is
needed again, the driver can call the framework to wake up
the device.
config PM_GOVERNOR_GREEDY
bool "Greedy governor"
---help---
This governor simply suggests the lowest-possible power state,
considering any states locked by calls to pm_stay() (accessible
via BOARDIOC_PM_STAY boardctl calls).
config PM_GOVERNOR_STABILITY
bool "Stability governor"
---help---
This governor will hold power state to ensure the request is stable
enough, other behavior is similar with greedy.
only when stay in WFI for enough time allow goto target state, or
will backward to the last state used.
considering any states locked by calls to pm_stay() (accessible
via BOARDIOC_PM_STAY boardctl calls).
config PM_GOVERNOR_ACTIVITY
bool "Activity based"
---help---
The activity based governor receives activity reports from drivers
in units which are accumulated during a certain time slice interval.
The governor will then switch between power states given a set of
activity thresholds for each state.
menu "Governor options"
config PM_GOVERNOR_EXPLICIT_RELAX
int "Stay initially at PM_NORMAL"
default 0
---help---
If you boot into NSH, especially using the greedy PM governor, since
NuttX will almost immediately go idle (when waiting for a prompt), the
lowest possible run-level will be selected, which may not be desirable.
This is not a problem if you directly run you application at boot, which
can hold off power levels using pm_stay() (via boardctl).
This option will initialize all run levels as if
pm_stay/pm_staytimeout() were to be called once for each.
if set to -1, that means pm_stay(), so that your application
needs to call pm_relax() (via boardctl()) for every run-level you
wish to allow to enter.
if set to timeout (unit: ms), that means pm_staytimeout(ms).
pm_relax() will be auto called after timeout.
if PM_GOVERNOR_STABILITY
config PM_GOVERNOR_STABILITY_IDLE_THRESH
int "Enter idle thresh >= (ticks)"
default 0
---help---
Only if first time try goto idle, can remain wfi for (ticks)
and second time still try goto this state, goto idle,
otherwise keep last state.
only if remained for >=(ticks), allow goto idle state.
set to 0 disable stability check for idle state.
config PM_GOVERNOR_STABILITY_STANDBY_THRESH
int "Enter standby thresh >= (ticks)"
default 0
---help---
Only if first time try goto standby, can remain wfi for (ticks)
and second time still try goto this state, goto standby,
otherwise keep last state.
only if remained for >=(ticks), allow goto standby state.
set to 0 disable stability check for standby state.
config PM_GOVERNOR_STABILITY_SLEEP_THRESH
int "Enter sleep thresh >= (ticks)"
default 0
---help---
Only if first time try goto sleep, can remain wfi for (ticks)
and second time still try goto this state, goto sleep,
otherwise keep last state.
only if remained for >=(ticks), allow goto sleep state.
set to 0 disable stability check for sleep state.
endif # PM_GOVERNOR_STABILITY
if PM_GOVERNOR_ACTIVITY
config PM_GOVERNOR_SLICEMS
int "PM time slice (msec)"
default 100
---help---
The power management module collects activity counts in time slices.
At the end of the time slice, the count accumulated during that
interval is applied to an averaging algorithm to determine the
activity level.
CONFIG_PM_GOVERNOR_SLICEMS provides the duration of that time slice in
milliseconds. Default: 100 Milliseconds
config PM_GOVERNOR_MEMORY
int "PM memory (msec)"
default 2
range 1 6
---help---
The averaging algorithm is simply: Y = (An*X + SUM(Ai*Yi))/SUM(Aj),
where i = 1..n-1 and j= 1..n, n is the length of the "memory",
Ai is the weight applied to each value, and X is the current
activity. These weights may be negative and a limited to the
range of int16_t.
CONFIG_PM_GOVERNOR_MEMORY provides the memory for the algorithm.
Default: 2
CONFIG_PM_GOVERNOR_COEFn provides weight for each sample. Default: 1
Setting CONFIG_PM_GOVERNOR_MEMORY=1 disables all smoothing.
config PM_GOVERNOR_COEFN
int "PM coefficient"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY.
config PM_GOVERNOR_COEF1
int "PM coefficient 1"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY.
config PM_GOVERNOR_COEF2
int "PM coefficient 2"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY
Ignored if CONFIG_PM_GOVERNOR_MEMORY <= 2
config PM_GOVERNOR_COEF3
int "PM coefficient 3"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY
Ignored if CONFIG_PM_GOVERNOR_MEMORY <= 3
config PM_GOVERNOR_COEF4
int "PM coefficient 4"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY
Ignored if CONFIG_PM_GOVERNOR_MEMORY <= 4
config PM_GOVERNOR_COEF5
int "PM coefficient 5"
default 1
---help---
See help associated with CONFIG_PM_GOVERNOR_MEMORY
Ignored if CONFIG_PM_GOVERNOR_MEMORY <= 5
config PM_GOVERNOR_IDLEENTER_THRESH
int "PM IDLE enter threshold"
default 1
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: <=1: Essentially no activity
config PM_GOVERNOR_IDLEEXIT_THRESH
int "PM IDLE exit threshold"
default 2
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: >=2: Active
config PM_GOVERNOR_IDLEENTER_COUNT
int "PM IDLE enter count"
default 30
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: Thirty IDLE slices to enter IDLE mode from normal
config PM_GOVERNOR_STANDBYENTER_THRESH
int "PM STANDBY enter threshold"
default 1
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: <=1: Essentially no activity
config PM_GOVERNOR_STANDBYEXIT_THRESH
int "PM STANDBY exit threshold"
default 2
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: >=2: Active
config PM_GOVERNOR_STANDBYENTER_COUNT
int "PM STANDBY enter count"
default 50
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: Fifty IDLE slices to enter STANDBY mode from IDLE
config PM_GOVERNOR_SLEEPENTER_THRESH
int "PM SLEEP enter threshold"
default 1
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: <=1: Essentially no activity
config PM_GOVERNOR_SLEEPEXIT_THRESH
int "PM SLEEP exit threshold"
default 2
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: >=2: Active
config PM_GOVERNOR_SLEEPENTER_COUNT
int "PM SLEEP enter count"
default 70
---help---
State changes then occur when the weight activity account crosses
threshold values for certain periods of time (time slice count).
CONFIG_PM_xxxENTER_THRESH is the threshold value for entering state xxx.
CONFIG_PM_xxxENTER_COUNT is the count for entering state xxx.
Resuming to normal state, on the other hand, is usually immediate and
controlled by wakeup conditions established by the platform.
Default: Fifty IDLE slices to enter SLEEP mode from STANDBY
endif # PM_GOVERNOR_ACTIVITY
endmenu
endif # PM
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