comedi_usb_auto_config(9)

💖 comedi_usb_auto_config(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes, that's the manual name, we're fancy now 💅 — and today's main character is comedi_usb_auto_config, a lil function from ./drivers/comedi that literally just gets your USB COMEDI driver set up and probed. it's giving "glue code but make it iconic." ✨

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✨ NAME ✨

comedi_usb_auto_config — Configure/probe a USB COMEDI driver 🦋

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🌸 SYNOPSIS 🌸

int comedi_usb_auto_config (struct usb_interface *intf , struct
comedi_driver *driver , unsigned long context );

like, three args, one int back. no cap. 🫶

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🎀 ARGUMENTS 🎀

• intf — the USB interface. the actual hardware situation, bestie 🔌
• driver — the registered COMEDI driver. already registered, okay? we're not doing registration here 🙈
• context — driver specific data, passed to comedi_auto_config. it's the little bag of stuff you hand over and hope they know what to do with 💌

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🔥 DESCRIPTION 🔥

so the way this works: you're typically calling this from the usb_driver (*probe) function. that's the vibe check moment where the kernel found your device and is like "okay what now." 👑

what it does is auto-configure a COMEDI device, using a pointer to the struct device embedded in *intf as the hardware device. yes — embedded in *intf, not some separate thing. important detail, don't come for me 😭

then the context value gets passed through to the driver's "auto_attach" handler. so whatever you stuffed into context? it lands right in auto_attach's lap. 🍓

and if the "auto_attach" handler is feeling nosy (affectionate), it may call comedi_to_usb_interface on the passed in COMEDI device to recover intf. like a little round trip. cute fr fr 🧚

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⭐ RETURN ⭐

it returns the result of calling comedi_auto_config — so that's 0 on success, or a negative error number on failure. that's it. that's the whole return value. 💀

ngl, always check it. 0 = slay, negative = something went sideways and you should probably not keep going.

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/comedi/comedi_usb.c
• comedi_to_usb_interface(9)
• comedi_to_usb_dev(9)
• comedi_usb_auto_unconfig(9)
• comedi_usb_driver_register(9)
• comedi_usb_driver_unregister(9)

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and that's the whole page bestie, go configure some USB COMEDI devices 💜

🌸 mwah 💋 — this gem came out of ./drivers/comedi, version dated October 2026, and it's literally titled comedi_usb_auto_config(9) because of course it is. periodt. 👑