STRUCT CDX_DEVICE_ID(9)

💅 struct cdx_device_id(9) 💅

okay so this is a page straight out of the Kernel API Manual, and it's all about struct cdx_device_id — the lil ID card that says "yes bestie, this CDX device matches this driver" 🎀

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✨ NAME ✨

struct cdx_device_id — the CDX device identifier, i.e. the thing that tells you which CDX device you're looking at 🦋

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✨ SYNOPSIS ✨

struct cdx_device_id {
    __u16 vendor;
    __u16 device;
    __u16 subvendor;
    __u16 subdevice;
    __u32 class;
    __u32 class_mask;
    __u32 override_only;
 };

no cap, that's the whole struct 👑

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✨ Members ✨

• vendor — the Vendor ID 🌸
• device — the Device ID 💜
• subvendor — the Subsystem vendor ID (or CDX_ANY_ID if you're feeling flexible ✨)
• subdevice — the Subsystem device ID (also CDX_ANY_ID if you don't wanna be picky 🙈)
• class — the Device class. real talk: most drivers do not need to specify class/class_mask, because vendor/device is normally sufficient 💅
• class_mask — limits which sub-fields of the class field actually get compared 🔍
• override_only — matches only when dev->driver_override is this driver, periodt 👑

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✨ Description ✨

so basically this is the type of the entries in the "device Id" table for CDX devices that a CDX device driver supports 🫶 like, it's the shape of every row in that table. iconic behavior honestly 💖

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✨ SEE ALSO ✨

the kernel file ./include/linux/device-id/cdx.h — go read it, iykyk 📖✨

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💀 friendly reminder: this struct is literally the device ID table entry format, so don't go inventing fields, bestie — keep every field exactly as listed 😭

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and that's the tea 🍓 — this cutie came from ./include/linux/device-id, dated October 2026, in the Kernel API Manual. slay, go forth and match some devices 💅🌈👑