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# Timer driver configuration options
# Copyright (c) 2014-2015 Wind River Systems, Inc.
# Copyright (c) 2016 Cadence Design Systems, Inc.
# Copyright (c) 2019 Intel Corp.
# SPDX-License-Identifier: Apache-2.0
if SYS_CLOCK_EXISTS
menu "Timer drivers"
config TIMER_HAS_64BIT_CYCLE_COUNTER
bool
help
When this option is true, the k_cycle_get_64() call is
available to provide values from a 64-bit cycle counter.
config TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
bool "Timer queries its hardware to find its frequency at runtime"
help
The drivers select this option automatically when needed. Do not modify
this unless you have a very good reason for it.
config SYSTEM_CLOCK_SLOPPY_IDLE
bool "Timer allowed to skew uptime clock during idle"
help
When true, the timer driver is not required to maintain a
correct system uptime count when the system enters idle.
Some platforms may take advantage of this to reduce the
overhead from regular interrupts required to handle counter
wraparound conditions.
config SYSTEM_CLOCK_INIT_PRIORITY
int "System clock driver initialization priority"
default 0
help
This options can be used to set a specific initialization priority
value for the system clock driver. As driver initialization might need
the clock to be running already, you should let the default value as it
is (0).
# Hidden option to be selected by individual SoC.
config TICKLESS_CAPABLE
bool
help
Timer drivers should select this flag if they are capable of
supporting tickless operation. That is, a call to
sys_clock_set_timeout() with a number of ticks greater than
one should be expected not to produce a call to
sys_clock_announce() (really, not to produce an interrupt at
all) until the specified expiration.
config SYSTEM_TIMER_HAS_DISABLE_SUPPORT
bool
help
This option should be selected by drivers implementing support for
sys_clock_disable() API.
config SYSTEM_CLOCK_LOCK_FREE_COUNT
bool
help
This option should be selected by drivers implementing a lock free
cycle count accessor. This is needed for instrumenting spin lock
hold times.
source "drivers/timer/Kconfig.altera_avalon"
source "drivers/timer/Kconfig.ambiq"
source "drivers/timer/Kconfig.x86"
source "drivers/timer/Kconfig.arcv2"
source "drivers/timer/Kconfig.arm_arch"
source "drivers/timer/Kconfig.cavs"
source "drivers/timer/Kconfig.cc13xx_cc26xx_rtc"
source "drivers/timer/Kconfig.cortex_m_systick"
source "drivers/timer/Kconfig.esp32"
source "drivers/timer/Kconfig.gecko"
source "drivers/timer/Kconfig.ite_it8xxx2"
source "drivers/timer/Kconfig.leon_gptimer"
source "drivers/timer/Kconfig.litex"
source "drivers/timer/Kconfig.mchp_xec_rtos"
source "drivers/timer/Kconfig.mcux_gpt"
source "drivers/timer/Kconfig.mcux_lptmr"
source "drivers/timer/Kconfig.mcux_os"
source "drivers/timer/Kconfig.mips_cp0"
source "drivers/timer/Kconfig.native_posix"
source "drivers/timer/Kconfig.npcx_itim"
source "drivers/timer/Kconfig.nrf_rtc"
source "drivers/timer/Kconfig.nrf_grtc"
source "drivers/timer/Kconfig.nrf_xrtc"
source "drivers/timer/Kconfig.rcar_cmt"
source "drivers/timer/Kconfig.riscv_machine"
source "drivers/timer/Kconfig.rv32m1_lptmr"
source "drivers/timer/Kconfig.sam0_rtc"
source "drivers/timer/Kconfig.stm32_lptim"
source "drivers/timer/Kconfig.xlnx_psttc"
source "drivers/timer/Kconfig.xtensa"
endmenu
endif # SYS_CLOCK_EXISTS