usb_gadget_connect(9)

💖 usb_gadget_connect(9) 💖

okay bestie, welcome to the Kernel API Manual corner of the group chat 🫶. today’s main character is usb_gadget_connect, and it is literally giving “let me connect to the USB host on purpose” energy ✨.

🌸 NAME 🌸

usb_gadget_connect — software-controlled connect to USB host. periodt. no cap, that’s the whole vibe 💅.

✨ SYNOPSIS ✨

here’s the signature, bestie — copy it exactly:

int usb_gadget_connect (struct usb_gadget *gadget );

🎀 ARGUMENTS 🎀

• gadget — the peripheral being connected. that’s the gadget that’s getting connected, obviously 🦋.

💅 DESCRIPTION 💅

okay so what does it actually do? it enables the D+ pullup (or potentially D- — the plot twist is real, bestie). The host will start enumerating this gadget when the pullup is active and a VBUS session is active (aka the link is powered). literally the link has to be powered, no cap 🔥.

it returns zero on success, else negative errno. so zero = slay, negative errno = not slay 😭.

🔥 SEE ALSO 🔥

the whole friend group of related calls and references — don’t skip any, iykyk 👑:

• 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_vbus_disconnect(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)

okay that’s the whole page, bestie. this icon came from ./drivers/usb/gadget/udc, dated October 2026, and the page itself is usb_gadget_connect(9) 💖✨. mwah 🎀.