_clkctrl_idlest(9)

💅 _clkctrl_idlest(9) — Kernel API Manual, section 9 🎀

okay so bestie, welcome to the group chat for _clkctrl_idlest(9) from the Kernel API Manual. this one's a lil cutie — it reads a CM_*_CLKCTRL register and hands you back the IDLEST bitfield, all nice and shifted down to bit 0. let's get into it ✨

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✨ NAME ✨

_clkctrl_idlest — read a CM_*_CLKCTRL register, then mask & shift the IDLEST bitfield 🦋

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🌸 SYNOPSIS 🌸

u32 _clkctrl_idlest (u8 part , u16 inst , u16 clkctrl_offs );

like, literally that's the whole vibe. three args in, a u32 out 💖

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🎀 ARGUMENTS 🎀

• part — the PRCM partition ID, aka which partition the CM_CLKCTRL register lives in 🗺️
• inst — the CM instance register offset, bestie — that's the *_INST macro 👑
• clkctrl_offs — the module clock control register offset, which is the *_CLKCTRL macro 🎯

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💜 DESCRIPTION 💜

so what does it actually do? it returns the IDLEST bitfield of a CM_*_CLKCTRL register, shifted down to bit 0. that's it, that's the whole function, and honestly? she ate 💅🔥

ngl the shifting is the main character energy here — the bitfield comes back already sitting at bit 0, so you don't gotta do the mask-and-shift dance yourself 🫶

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🌈 SEE ALSO 🌈

the whole friend group, fr fr — starting with the kernel file ./arch/arm/mach-omap2/cminst44xx.c 💖

• omap_cm_base_init(9)
• _is_module_ready(9)
• _clktrctrl_write(9)
• omap4_cminst_is_clkdm_in_hwsup(9)
• omap4_cminst_clkdm_enable_hwsup(9)
• omap4_cminst_clkdm_disable_hwsup(9)
• omap4_cminst_clkdm_force_wakeup(9)
• omap4_cminst_wait_module_ready(9)
• omap4_cminst_wait_module_idle(9)
• omap4_cminst_module_enable(9)
• omap4_cminst_module_disable(9)
• omap4_clkdm_save_context(9)
• omap4_clkdm_restore_context(9)

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and that's the page, bestie!! 🧚 this lil icon lives over in ./arch/arm/mach-omap2, and the version info is dated October 2026. go read the source, ily, bye 💜✨