STRUCT AMBA_ID(9)

💅 struct amba_id (9) — Kernel API Manual, bestie edition ✨

okay so picture this: you're a driver, you're chilling on an AMBA bus, and you need to know which device is talking to you. that's literally the whole plot of struct amba_id — it's the little ID card that identifies a device on an AMBA bus 🎀

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✨ NAME ✨

struct amba_id — identifies a device on an AMBA bus. that's it, that's the vibe check 💖

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🦋 SYNOPSIS 🦋

struct amba_id {
    unsigned int            id;
    unsigned int            mask;
    void *data;
 };

look at her. three fields. main character energy only 👑

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🌸 Members 🌸

• id — the significant bits of the hardware device ID. the parts that actually matter, the ones that get to be on the poster 🫶
• mask — the bitmask that says which bits of the id field are significant when matching. think of it as the group chat invite list for bits 💅 a driver binds to a device when:

((hardware device ID) & mask) == id

that's the whole match-up ritual, no cap. mask says which bits show up, id says what they gotta equal, and if the math says yes, the driver and device are officially a thing 😭✨

• data — private data used by the driver. their business, not ours 🙈

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👀 SEE ALSO 👀

• Kernel file ./include/linux/device-id/amba.h — go read it, iykyk 📖

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fr fr, do not sleep on the ((hardware device ID) & mask) == id check. that's the entire matchmaking service right there — get the mask wrong and nobody binds to anybody. lowkey tragic 💀

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and that's the page, bestie!! 🌈 this one came from the Kernel API Manual (that's the manual name, keep it in your notes 📝), source/version ./include/linux/device-id, dated October 2026 ⭐. slay, go match some devices 💜🧚‍♀️