cm_setup_timer(9)

💅 cm_setup_timer(9) — the kernel API manual, bestie edition ✨

okay so picture this: it's the cm_setup_timer(9) page from the Kernel API Manual, and it's here to explain how in-suspend monitoring sets up its wakeup alarm for suspend_again. yes that's a lot of words, we're getting through them together 🫶

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🌸 NAME 🌸

cm_setup_timer — literally the function that does in-suspend monitoring setup for the wakeup alarm, for suspend_again. that's the whole vibe check.

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✨ SYNOPSIS ✨

bool cm_setup_timer (void );

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🎀 ARGUMENTS 🎀

• void — no arguments. zero. none. it takes nothing, it needs nothing, it's giving self-sufficient main character energy 👑

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💖 DESCRIPTION 💖

so here's the tea, bestie:

• it returns true if the alarm is set for Charger Manager to use ✅
• it returns false if cm_setup_timer fails to set an alarm, or if cm_setup_timer does not need to set an alarm for Charger Manager, or if an alarm that was previously configured is the one to be used 🙈

like, all three of those false situations are in the same bucket, fr fr. don't come for me, that's just how it is.

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🦋 SEE ALSO 🦋

the kernel file is ./drivers/power/supply/charger-manager.c and honestly it's the whole friend group, so let's do the roll call 📋:

• is_batt_present(9)
• is_ext_pwr_online(9)
• get_batt_uV(9)
• is_charging(9)
• is_full_charged(9)
• is_polling_required(9)
• try_charger_enable(9)
• check_charging_duration(9)
• cm_get_target_status(9)
• _cm_monitor(9)
• cm_monitor(9)
• _setup_polling(9)
• cm_monitor_poller(9)
• charger_extcon_work(9)
• charger_extcon_notifier(9)
• charger_extcon_init(9)
• charger_manager_register_extcon(9)
• charger_manager_prepare_sysfs(9)

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ngl, that SEE ALSO list is long but every single one of them ate 🔥 go read them, iykyk

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p.s. this icon of a page lives in ./drivers/power/supply, it's dated October 2026, and it answers to cm_setup_timer(9) — periodt. mwah 💋💜