usb_gadget_vbus_disconnect(9)

💖 usb_gadget_vbus_disconnect(9) 💖

okay so bestie, welcome to the Kernel API Manual page for usb_gadget_vbus_disconnect(9) — this is the one that tells the controller “hey, the VBUS party is OVER” 🎉🚫 and honestly? iconic.

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✨ NAME ✨

usb_gadget_vbus_disconnect — notify controller about VBUS session end 💅

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🌸 SYNOPSIS 🌸

int usb_gadget_vbus_disconnect (struct usb_gadget *gadget );

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🎀 ARGUMENTS 🎀

• gadget — the device whose VBUS supply is being described. like, this is the gadget we're talking about, bestie 🫶

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🦋 CONTEXT 🦋

okay so important vibe check: this one can sleep. literally, it's allowed to nap 😴💤 so keep that in mind when you're deciding where to call it from, bestie. no cap.

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⭐ DESCRIPTION ⭐

so here's the tea ☕ — this call is used by a driver for an external transceiver (or GPIO) that detects a VBUS power session ending. basically the physical layer is like “we're done here” and this function carries that message to the controller 🦋

common responses include reversing everything done in usb_gadget_vbus_connect — like, undo the whole fit, periodt 💅✨

returns zero on success, else negative errno — so if you get a negative number back, something went sideways and it's giving error energy 😭

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🔥 SEE ALSO 🔥

okay this list is LONG but we're not skipping a single one, bestie — every reference stays, fr fr:

• Kernel file ./drivers/usb/gadget/udc/core.c, struct usb_udc(9)
• usb_ep_set_maxpacket_limit(9)
• usb_ep_enable(9)
• usb_ep_disable(9)
• usb_ep_alloc_request(9)
• usb_ep_free_request(9)
• usb_ep_queue(9)
• usb_ep_dequeue(9)
• usb_ep_set_halt(9)
• usb_ep_clear_halt(9)
• usb_ep_set_wedge(9)
• usb_ep_fifo_status(9)
• usb_ep_fifo_flush(9)
• usb_gadget_frame_number(9)
• usb_gadget_wakeup(9)
• usb_gadget_set_remote_wakeup(9)
• usb_gadget_set_selfpowered(9)
• usb_gadget_clear_selfpowered(9)
• usb_gadget_vbus_connect(9)
• usb_gadget_vbus_draw(9)
• usb_gadget_connect(9)
• usb_gadget_disconnect(9)
• usb_gadget_deactivate(9)
• usb_gadget_activate(9)
• usb_gadget_giveback_request(9)
• gadget_find_ep_by_name(9)
• usb_gadget_check_config(9)
• usb_udc_vbus_handler(9)
• usb_gadget_udc_reset(9)
• usb_gadget_udc_start_locked(9)
• usb_gadget_udc_stop_locked(9)
• usb_gadget_udc_set_speed(9)
• usb_gadget_enable_async_callbacks(9)
• usb_gadget_disable_async_callbacks(9)
• usb_udc_release(9)
• usb_initialize_gadget(9)
• usb_add_gadget(9)
• usb_add_gadget_udc_release(9)
• usb_get_gadget_udc_name(9)
• usb_add_gadget_udc(9)
• usb_del_gadget(9)
• usb_del_gadget_udc(9)

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and that's the whole page, bestie 🫶 this gem comes from ./drivers/usb/gadget/udc, October 2026, and it's filed under usb_gadget_vbus_disconnect(9) — go forth and disconnect that VBUS with confidence 💅✨