usb_add_gadget_udc(9)

💖 usb_add_gadget_udc(9) 💖

okay so you're in the Kernel API Manual, bestie, and this page is literally all about usb_add_gadget_udc — the function that adds a new gadget to the udc class driver list. yes it's giving kernel-internals energy, but stay with me, it's actually so simple 🫶

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✨ NAME ✨

usb_add_gadget_udc — adds a new gadget to the udc class driver list 💅

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🌸 SYNOPSIS 🌸

int usb_add_gadget_udc (struct device *parent , struct usb_gadget *gadget );

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🎀 ARGUMENTS 🎀

• parent — the parent device of this udc. normally it's the controller driver's device, like that's its whole thing 💖
• gadget — the gadget being added to the list, the main character of this operation fr fr ✨

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🦋 DESCRIPTION 🦋

returns zero on success, negative errno otherwise. that's it. that's the whole description, no cap 😭 zero = slay, negative = not slay, and you get an errno to tell you why 🔥

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🌈 SEE ALSO 🌈

the kernel file is ./drivers/usb/gadget/udc/core.c, and the whole friend group is here so let's go 👑

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_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_del_gadget(9), usb_del_gadget_udc(9)

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lowkey read the whole list before you go poking at gadget code, bestie — these are all siblings in the same little kernel family 🧚

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⭐ that's the page!! sourced from ./drivers/usb/gadget/udc, dated October 2026, filed under usb_add_gadget_udc(9) — periodt, go add your gadget 💜🌸