dwc2_hsotg_wait_bit_set(9)

💅 dwc2_hsotg_wait_bit_set — a Kernel API Manual moment 🎀

okay bestie, so this page lives in the Kernel API Manual (yes, the kernel has a manual, and yes it's iconic), and it's all about one little function: dwc2_hsotg_wait_bit_set. Buckle up, it's giving "poll a register like your life depends on it" 💖

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✨ NAME ✨

dwc2_hsotg_wait_bit_set — literally just waits for a bit to be set. that's the whole gig. no cap.

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🌸 SYNOPSIS 🌸

int dwc2_hsotg_wait_bit_set (struct dwc2_hsotg *hsotg , u32 offset , u32
mask , u32 timeout );

look at her. four args. very demure, very mindful 🫶

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🦋 ARGUMENTS 🦋

• hsotg — the programming view of the DWC_otg controller. this is your main character struct, the whole vibe check for the controller 💅
• offset — the register's offset, aka where the bit/bits are supposed to get set. think of it as the address drop-pin 📍
• mask — the mask of the bit/bits that must be set. this is the filter, the "only these ones matter" energy ⭐
• timeout — the timeout to wait. how long you're willing to stand there refreshing before you give up 😭

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🔥 RETURN 🔥

• 0 if the bit/bits are set 🎉 slay, we love a success
• -ETIMEDOUT in case of timeout 💀 yeah… when time runs out, it's over

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🧚 SEE ALSO 🧚

Kernel file ./drivers/usb/dwc2/core.c and the whole friend group:

• dwc2_backup_global_registers(9)
• dwc2_restore_global_registers(9)
• dwc2_exit_partial_power_down(9)
• dwc2_enter_partial_power_down(9)
• dwc2_restore_essential_regs(9)
• dwc2_hib_restore_common(9)
• dwc2_wait_for_mode(9)
• dwc2_iddig_filter_enabled(9)
• dwc2_force_mode(9)
• dwc2_clear_force_mode(9)
• dwc2_dump_host_registers(9)
• dwc2_dump_global_registers(9)
• dwc2_flush_tx_fifo(9)
• dwc2_flush_rx_fifo(9)
• dwc2_enable_global_interrupts(9)
• dwc2_disable_global_interrupts(9)
• dwc2_hsotg_wait_bit_clear(9) — her sister function, the one who waits for the opposite thing 🙈

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and that's the page, bestie 💜 this little icon lives in ./drivers/usb/dwc2 and the date stamp on it is October 2026 — so go forth, wait for your bits, and remember: if it times out you get -ETIMEDOUT, not a hug 😭🫶 mwah, bye! 🍓