clockevents...and_register(9)

✨ clockevents_config_and_register(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 this one's a kernel function, and yes it's giving main character energy — it configures and registers a clock event device in one go. two jobs, one function, we love an efficient icon 🎀

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🌸 NAME 🌸

clockevents_config_and_register — configure and register a clock event device ✨

🦋 SYNOPSIS 🦋

void clockevents_config_and_register (struct clock_event_device *dev ,
u32 freq , unsigned long min_delta , unsigned long max_delta );

like, it returns void. nothing comes back. it just does the thing 💅 no cap.

🎀 ARGUMENTS 🎀

• dev — the device to register. this is your little guy, the struct clock_event_device * that's about to get configured and yeeted into the registry 🫶
• freq — the clock frequency. u32, that's the number bestie, the actual clock frequency ✨
• min_delta — the minimum clock ticks to program in oneshot mode. the floor, the "no less than this" of it all 🙈
• max_delta — the maximum clock ticks to program in oneshot mode. the ceiling, the "okay that's enough" 🌈

💖 DESCRIPTION 💖

so here's the lowkey important bit: min_delta and max_delta can be 0 for devices which do not support oneshot mode. that's it, that's the whole description — and honestly? iconic. short and honest, we stan 👑

heads up babe: min_delta and max_delta both being 0 is only for devices that don't support oneshot mode. don't just set them to 0 for funsies, iykyk 😭

🔥 SEE ALSO 🔥

the whole friend group, in order, fr fr:

• Kernel file ./kernel/time/clockevents.c
• clockevent_delta2ns(9)
• clockevents_switch_state(9)
• clockevents_shutdown(9)
• clockevents_tick_resume(9)
• clockevents_increase_min_delta(9)
• clockevents_program_min_delta(9) — yes it's listed twice in the original, and I'm keeping it twice, because we do not edit the source material 💀 slay for consistency tho
• clockevents_program_min_delta(9)
• clockevents_program_event(9)
• clockevents_register_device(9)
• clockevents_update_freq(9)
• clockevents_exchange_device(9)
• clockevents_suspend(9)
• clockevents_resume(9)
• tick_offline_cpu(9)

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and that's the whole page bestie, go configure some clock events 🧚💜

this little gem lives in ./kernel/time and the version of the page you're reading is dated October 2026. mwah, ily, bye 🍓💅