omap44xx_pr...le_io_wakeup(9)

🌸 omap44xx_pr...le_io_wakeup(9) — like, the Kernel API Manual bestie 💅

okay so real talk, this is a page from the Kernel API Manual, and the star of the show is omap44xx_prm_enable_io_wakeup. it's giving tiny function, big responsibilities. no cap. 🦋

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✨ NAME ✨

omap44xx_prm_enable_io_wakeup — turns on wakeup events from the I/O wakeup latches 💖

✨ SYNOPSIS ✨

void omap44xx_prm_enable_io_wakeup (void );

✨ ARGUMENTS ✨

• void — literally no arguments, bestie. she takes nothing. zero. nada. main character energy of not needing input 🎀

✨ DESCRIPTION ✨

so what she does: she activates the I/O wakeup event latches, and she lets the events that those latches logged go ahead and signal a wakeup event to the PRCM. that's the whole vibe. ⭐

but listen — for I/O wakeups to actually occur, two other things gotta be true, and this is the part where people get caught out 😭:

• the WAKEUPENABLE bits must be set in the pad mux registers, and
• omap44xx_prm_reconfigure_io_chain must be called

fr fr, don't skip those two. this function is a team player, not a solo act 💀

and no return value. she's void, she gives nothing back, she simply does 💅

✨ SEE ALSO ✨

the whole friend group 🫶

• Kernel file ./arch/arm/mach-omap2/prm44xx.c
• omap44xx_prm_read_pending_irqs(9)
• omap44xx_prm_ocp_barrier(9)
• omap44xx_prm_save_and_clear_irqen(9)
• omap44xx_prm_restore_irqen(9)
• omap44xx_prm_reconfigure_io_chain(9)
• omap44xx_prm_read_reset_sources(9)
• omap44xx_prm_was_any_context_lost_old(9)
• omap44xx_prm_clear_context_loss_flags_old(9)
• omap4_pwrdm_read_prev_logic_pwrst(9)
• omap4_pwrdm_read_prev_mem_pwrst(9)
• omap4_pwrdm_save_context(9)
• omap4_pwrdm_restore_context(9)

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okay and that's the whole page, you ate that 💜 this one lives at ./arch/arm/mach-omap2, dated October 2026, so go forth and enable those wakeups, icon 👑✨