usb_cdc_wdm_register(9)

✨ usb_cdc_wdm_register(9) ✨

Okay bestie, so this one's from the Kernel API Manual, and it's literally the glow-up moment where a USB CDC WDM subdriver gets registered 💅 like, it's giving "let me introduce you to the interface" energy.

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🎀 NAME 🎀

usb_cdc_wdm_register — register a WDM subdriver 🦋

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🌸 SYNOPSIS 🌸

struct usb_driver * usb_cdc_wdm_register (struct usb_interface *intf ,
struct usb_endpoint_descriptor *ep , int bufsize , enum wwan_port_type
type , int (*manage_power)(struct usb_interface *, int) );

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💖 ARGUMENTS 💖

• intf — the usb interface this subdriver is gonna be associating itself with, iykyk 🫶
• ep — the interrupt endpoint it's keeping an eye on for notifications 👀
• bufsize — the maximum message size you wanna support for read/write 📨
• type — the Type/protocol of the transported data (MBIM, QMI, ...) 🔥
• manage_power — the call-back invoked during open and release to manage the device's power ⚡

So basically: create WDM usb class character device and associate it with intf without binding, allowing another driver to manage the interface. No cap, that's the whole vibe ✨

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🌈 DESCRIPTION 🌈

The subdriver will manage the given interrupt endpoint exclusively, and it will issue control requests referring to the given intf. Other than that it will avoid interferring — and in particular it will not do usb_set_intfdata/usb_get_intfdata on intf. Respect the boundaries, periodt 💀

The return value is a pointer to the subdriver's struct usb_driver. The registering driver is responsible for calling this subdriver's disconnect, suspend, resume, pre_reset and post_reset methods from its own ones. Like, you gotta hand off those calls yourself, bestie — no auto-pilot on this one 🙈

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/usb/class/cdc-wdm.c 👑

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That's the whole page, babes ⭐ — brought to you from ./drivers/usb/class, dated October 2026, in the lovely Kernel API Manual 🎀 mwah, go register something iconic 💜