_is_module_ready(9)

💅 _is_module_ready(9)

okay so this is a page from the Kernel API Manual and honestly? it's a little baddie of a function. it answers one (1) very important question: can we touch this module's registers without the whole thing going abort on us? 🫶

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✨ NAME ✨

_is_module_ready — can module registers be accessed without causing an abort?

like, literally, is it safe to poke the registers or are we about to have a bad time. that's the whole vibe check. 💀

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🎀 SYNOPSIS 🎀

bool _is_module_ready (u8 part , u16 inst , u16 clkctrl_offs );

it returns a bool, bestie. true or false. that's the whole API. 🔥

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🌸 ARGUMENTS 🌸

• part — the PRCM partition ID, i.e. which partition the CM_CLKCTRL register lives in. it's a u8, keep it cute.
• inst — the CM instance register offset. you get this from the *_INST macro, mkay? 🎯
• clkctrl_offs — the module clock control register offset, courtesy of the *_CLKCTRL macro. very demure, very macro. ✨

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👑 DESCRIPTION 👑

returns true if the module's CM_*_CLKCTRL.IDLEST bitfield is either *FUNCTIONAL or *INTERFACE_IDLE. returns false otherwise.

that's it. that's the function. it looks at the IDLEST bits and tells you if the module is chill or not chill. no cap. 💅

bestie note: if it comes back false, do not go accessing those registers anyway. that's the abort. we don't do aborts here. 🙈

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🦋 SEE ALSO 🦋

all the siblings and cousins, fr fr — and they're all in the kernel file ./arch/arm/mach-omap2/cminst44xx.c:

• omap_cm_base_init(9)
• _clkctrl_idlest(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)

go read them. iykyk. 📚✨

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k bye bestie!! 🧚💖 this iconic little page lives in ./arch/arm/mach-omap2 and was stamped October 2026 — mwah, slay, periodt. 🎀💜