omap44xx_pr...ure_io_chain(9)

💅 omap44xx_prm_reconfigure_io_chain — Kernel API Manual, bestie edition ✨

okay so this is a page straight out of the Kernel API Manual and it's all about omap44xx_prm_reconfigure_io_chain, which is genuinely one of those names that's giving "I was generated by a script" but no, it's iconic, we respect it 🫶

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🎀 NAME 🎀

omap44xx_prm_reconfigure_io_chain — clears the latches and reconfigures the I/O chain. that's it, that's the whole vibe 💅

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✨ SYNOPSIS ✨

void omap44xx_prm_reconfigure_io_chain (void );

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🌸 ARGUMENTS 🌸

• void — literally no arguments. zero. nada. it takes nothing, it needs nothing, it's that self-sufficient main character 👑

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🦋 DESCRIPTION 🦋

so what does it do? bestie, it's actually pretty simple:

• it clears any previously-latched I/O wakeup events — like wiping the slate clean ✨
• and it makes sure the I/O wakeup gates are aligned with the current mux settings 💖

the way it pulls this off: it asserts WUCLKIN, waits for WUCLKOUT to be asserted, then deasserts WUCLKIN and waits for WUCLKOUT to be deasserted. a whole little handshake moment, honestly kind of a serve 🤝

no return value. it's void, remember? it gives you nothing back because it already gave you everything 😌

XXX — and here's the part where the kernel devs themselves are like "are the final two steps necessary?" 😭 yes, the source doc literally has that question in it, no cap. we're all just out here living with the mystery 🙈

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🧚 SEE ALSO 🧚

the kernel file lives at ./arch/arm/mach-omap2/prm44xx.c — go say hi 🫶

and here's the whole friend group:

• 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_enable_io_wakeup(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)

like, that's a squad 💜

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and that's the page!! this one ships out of ./arch/arm/mach-omap2, dated October 2026, and it's a whole <rainbow>Kernel API Manual</rainbow> moment 🎀 go forth and reconfigure those I/O chains, bestie 💖✨