clkdm_for_each(9)

💖 clkdm_for_each(9) — Kernel API Manual 🦋

okay bestie, this is the Kernel API Manual page for clkdm_for_each(9) — and it's giving “tiny iterator with big responsibilities” energy. ✨

🌸 NAME

clkdm_for_each — call function on each registered clockdomain.

✨ SYNOPSIS

int clkdm_for_each (int (*fn)(struct clockdomain *clkdm, void *user) ,
       void *user );

🎀 ARGUMENTS

• fn — callback function *, aka the callback that gets called for each registered clockdomain.
• user — -- undescribed -- 🙈 that's literally what the page says, no cap.

💅 DESCRIPTION

Call the supplied function fn for each registered clockdomain. Fr fr, every single one. 💫

The callback function fn can return anything but 0 to bail out early from the iterator. So 0 keeps it going, and anything else is like “bestie, we're out.” 😭

The callback function is called with the clkdm_mutex held, so no clockdomain structure manipulation functions should be called from the callback — like, do not do that. Although hardware clockdomain control functions are fine. 👑

Returns the last return value of the callback function, which should be 0 for success or anything else to indicate failure; or -EINVAL if the function pointer is null.

👀 SEE ALSO

Kernel file ./arch/arm/mach-omap2/clockdomain.c — _clkdm_register(9), _autodep_lookup(9), _resolve_clkdm_deps(9), _clkdm_add_wkdep(9), _clkdm_del_wkdep(9), _clkdm_add_sleepdep(9), _clkdm_del_sleepdep(9), clkdm_register_platform_funcs(9), clkdm_register_clkdms(9), clkdm_register_autodeps(9), clkdm_complete_init(9), clkdm_lookup(9), clkdm_get_pwrdm(9), clkdm_add_wkdep(9), clkdm_del_wkdep(9), clkdm_read_wkdep(9), clkdm_clear_all_wkdeps(9), clkdm_add_sleepdep(9), clkdm_del_sleepdep(9), clkdm_read_sleepdep(9), clkdm_clear_all_sleepdeps(9), clkdm_sleep_nolock(9), clkdm_sleep(9), clkdm_wakeup_nolock(9), clkdm_wakeup(9), clkdm_allow_idle_nolock(9), clkdm_allow_idle(9), clkdm_deny_idle_nolock(9), clkdm_deny_idle(9), clkdm_add_autodeps(9), clkdm_del_autodeps(9), clkdm_clk_enable(9), clkdm_clk_disable(9), clkdm_hwmod_enable(9), clkdm_hwmod_disable(9), _clkdm_save_context(9), _clkdm_restore_context(9), clkdm_save_context(9), clkdm_restore_context(9).

mwah 💋 that's the whole page! Source/version: ./arch/arm/mach-omap2; date: October 2026; page: clkdm_for_each(9). bye bestie 🫶✨