93 lines
3.2 KiB
Plaintext
93 lines
3.2 KiB
Plaintext
# Timer driver configuration options
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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# Copyright (c) 2016 Cadence Design Systems, Inc.
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# Copyright (c) 2019 Intel Corp.
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# SPDX-License-Identifier: Apache-2.0
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menu "Timer Drivers"
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config TIMER_HAS_64BIT_CYCLE_COUNTER
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bool
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help
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When this option is true, the k_cycle_get_64() call is
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available to provide values from a 64-bit cycle counter.
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config TIMER_READS_ITS_FREQUENCY_AT_RUNTIME
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bool "Timer queries its hardware to find its frequency at runtime"
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help
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The drivers select this option automatically when needed. Do not modify
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this unless you have a very good reason for it.
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config SYSTEM_CLOCK_SLOPPY_IDLE
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bool "Timer allowed to skew uptime clock during idle"
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help
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When true, the timer driver is not required to maintain a
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correct system uptime count when the system enters idle.
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Some platforms may take advantage of this to reduce the
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overhead from regular interrupts required to handle counter
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wraparound conditions.
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config SYSTEM_CLOCK_INIT_PRIORITY
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int "System clock driver initialization priority"
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default 0
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help
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This options can be used to set a specific initialization priority
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value for the system clock driver. As driver initialization might need
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the clock to be running already, you should let the default value as it
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is (0).
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# Hidden option to be selected by individual SoC.
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config TICKLESS_CAPABLE
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bool
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help
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Timer drivers should select this flag if they are capable of
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supporting tickless operation. That is, a call to
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sys_clock_set_timeout() with a number of ticks greater than
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one should be expected not to produce a call to
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sys_clock_announce() (really, not to produce an interrupt at
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all) until the specified expiration.
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config SYSTEM_TIMER_HAS_DISABLE_SUPPORT
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bool
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help
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This option should be selected by drivers implementing support for
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sys_clock_disable() API.
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config SYSTEM_CLOCK_LOCK_FREE_COUNT
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bool
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help
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This option should be selected by drivers implementing a lock free
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cycle count accessor. This is needed for instrumenting spin lock
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hold times.
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source "drivers/timer/Kconfig.altera_avalon"
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source "drivers/timer/Kconfig.apic"
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source "drivers/timer/Kconfig.arcv2"
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source "drivers/timer/Kconfig.arm_arch"
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source "drivers/timer/Kconfig.cavs"
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source "drivers/timer/Kconfig.cc13x2_cc26x2_rtc"
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source "drivers/timer/Kconfig.cortex_m_systick"
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source "drivers/timer/Kconfig.esp32c3_sys"
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source "drivers/timer/Kconfig.hpet"
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source "drivers/timer/Kconfig.ite_it8xxx2"
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source "drivers/timer/Kconfig.leon_gptimer"
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source "drivers/timer/Kconfig.litex"
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source "drivers/timer/Kconfig.mchp_xec_rtos"
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source "drivers/timer/Kconfig.mcux_gpt"
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source "drivers/timer/Kconfig.mcux_lptmr"
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source "drivers/timer/Kconfig.mcux_os"
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source "drivers/timer/Kconfig.mips_cp0"
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source "drivers/timer/Kconfig.native_posix"
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source "drivers/timer/Kconfig.npcx_itim"
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source "drivers/timer/Kconfig.nrf_rtc"
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source "drivers/timer/Kconfig.rcar_cmt"
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source "drivers/timer/Kconfig.riscv_machine"
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source "drivers/timer/Kconfig.rv32m1_lptmr"
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source "drivers/timer/Kconfig.sam0_rtc"
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source "drivers/timer/Kconfig.stm32_lptim"
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source "drivers/timer/Kconfig.xlnx_psttc"
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source "drivers/timer/Kconfig.xtensa"
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endmenu
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