hw_wait_vbus_lower_bsv(9)

💅 hw_wait_vbus_lower_bsv(9) — the Kernel API Manual, bestie edition 🎀

okay so real talk, this page is from the Kernel API Manual and it's literally about hw_wait_vbus_lower_bsv — yes that's a whole mouthful, iykyk. it's giving "small function, big responsibilities" and honestly? we're obsessed. 🦋

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✨ NAME ✨

hw_wait_vbus_lower_bsv — the moment we switch into device mode, the vbus value needs to be lower than OTGSC_BSV before we connect to the host. that's the whole vibe check. no cap. 💅

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🌸 SYNOPSIS 🌸

int hw_wait_vbus_lower_bsv (struct ci_hdrc *ci );

that's it, that's the signature. copy it exactly, bestie, don't be out here "fixing" the spacing 🙈

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🫶 ARGUMENTS 🫶

• ci — the controller. that's the whole description. she's the main character here, the one we're waiting on. 👑

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🔥 DESCRIPTION 🔥

so basically this function returns an error code if there's a timeout. that's it. that's the tea. 😭

like, if the waiting goes on too long and things don't line up, it does not sugarcoat it — you get an error code back, periodt. ⭐

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/usb/chipidea/otg.c and the whole friend group is linked below, go say hi 💖

• hw_read_otgsc(9)
• hw_write_otgsc(9)
• ci_otg_role(9)
• ci_otg_work(9)
• ci_hdrc_otg_init(9)
• ci_hdrc_otg_destroy(9)

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and that's the page!! mwah 💋 this one came straight out of ./drivers/usb/chipidea and it's dated October 2026 — put that in your calendar, bestie, slay 🎀✨🦋