Help¶

System clock source initialization waits until clock is available. In some systems, clock initially runs from less accurate source which has faster startup time and then seamlessly switches to the target clock source when it is ready. When this option is picked, system clock is available after system clock driver initialization but it may be less accurate. Option is equivalent to waiting for stability if clock source does not have intermediate state.

Direct dependencies¶

<choice: Clock startup policy>

(Includes any dependencies from ifs and menus.)

Kconfig definition¶

At <Zephyr>/drivers/timer/Kconfig:172

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:32 → <Zephyr>/drivers/Kconfig:28

Menu path: (Top) → Device Drivers → Timer Drivers → nRF Real Time Counter (NRF_RTC1) Timer → Clock startup policy

config SYSTEM_CLOCK_WAIT_FOR_AVAILABILITY
    bool "Wait for availability"
    depends on <choice: Clock startup policy>
    help
      System clock source initialization waits until clock is available. In some
      systems, clock initially runs from less accurate source which has faster
      startup time and then seamlessly switches to the target clock source when
      it is ready. When this option is picked, system clock is available after
      system clock driver initialization but it may be less accurate. Option is
      equivalent to waiting for stability if clock source does not have
      intermediate state.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)