michaelh/zephyr
1
0
Fork 0
Code Releases Activity

kernel/kconfig: Move TICKLESS options out of power management tree

Browse source 
These options are rapidly becoming a default configuration, which is
complicated by having them be hidden inside of a SYS_POWER_MANAGEMENT
variable that has to be enabled first.  Put them at the top level of
the kernel config.

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This commit is contained in:
Andy Ross 2018-10-01 11:13:55 -07:00 • committed by Anas Nashif
commit 08397277fc
2 changed files with 27 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

27
kernel/Kconfig
View file

@ -675,6 +675,33 @@ config MP_NUM_CPUS
endmenu
config TICKLESS_IDLE
bool "Tickless idle"
default y if SYS_POWER_MANAGEMENT
help
This option suppresses periodic system clock interrupts whenever the
kernel becomes idle. This permits the system to remain in a power
saving state for extended periods without having to wake up to
service each tick as it occurs.
config TICKLESS_IDLE_THRESH
int "Tickless idle threshold"
default 3
depends on TICKLESS_IDLE
help
This option enables clock interrupt suppression when the kernel idles
for only a short period of time. It specifies the minimum number of
ticks that must occur before the next kernel timer expires in order
for suppression to happen.
config TICKLESS_KERNEL
bool "Tickless kernel"
default n
help
This option enables a fully event driven kernel. Periodic system
clock interrupt generation would be stopped at all times. This option
requires Tickless Idle option to be enabled.
source "kernel/Kconfig.power_mgmt"
endmenu

27
kernel/Kconfig.power_mgmt
View file

@ -70,31 +70,4 @@ config DEVICE_POWER_MANAGEMENT
like turning off device clocks and peripherals. The device drivers
may also save and restore states in these hook functions.
config TICKLESS_IDLE
bool "Tickless idle"
default y
help
This option suppresses periodic system clock interrupts whenever the
kernel becomes idle. This permits the system to remain in a power
saving state for extended periods without having to wake up to
service each tick as it occurs.
config TICKLESS_IDLE_THRESH
int "Tickless idle threshold"
default 3
depends on TICKLESS_IDLE
help
This option enables clock interrupt suppression when the kernel idles
for only a short period of time. It specifies the minimum number of
ticks that must occur before the next kernel timer expires in order
for suppression to happen.
config TICKLESS_KERNEL
bool "Tickless kernel"
depends on TICKLESS_IDLE
help
This option enables a fully event driven kernel. Periodic system
clock interrupt generation would be stopped at all times. This option
requires Tickless Idle option to be enabled.
endif