STRUCT I2C_ATR_CHAN(9)

💅 struct i2c_atr_chan(9) — the kernel API manual, bestie edition ✨

okay so this is a page from the kernel API manual (you know, the (9) section, the one where all the structs live 🫶). Buckle up, we're looking at struct i2c_atr_chan, and ngl it's giving "data for a channel" — literally that's what the NAME section says, and it ate. 💖

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🌸 NAME 🌸

struct i2c_atr_chan — Data for a channel. that's it, that's the vibe, short and iconic ✨

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🦋 SYNOPSIS 🦋

here's the whole struct, character for character, don't touch anything, she's perfect:

struct i2c_atr_chan {
    struct i2c_adapter adap;
    struct i2c_atr *atr;
    u32 chan_id;
    struct mutex alias_pairs_lock;
    struct lock_class_key alias_pairs_lock_key;
    struct list_head alias_pairs;
    struct i2c_atr_alias_pool *alias_pool;
    struct mutex orig_addrs_lock;
    struct lock_class_key orig_addrs_lock_key;
    u16 *orig_addrs;
    unsigned int orig_addrs_size;
 };

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🎀 Members 🎀

bestie. every single field, coming right up, no skipping, we don't do that here 💅

• adap — the struct i2c_adapter for the channel. main character adapter energy 🔥
• atr — the parent I2C ATR. hi mom 👑
• chan_id — the ID of this channel, a u32 saying which one she is.
• alias_pairs_lock — the mutex protecting alias_pairs. don't touch the list without her 🌸
• alias_pairs_lock_key — the lock key for alias_pairs_lock. lockdep's little name tag 🏷️
• alias_pairs — a list of struct i2c_atr_alias_pair containing the assigned aliases. it's a whole roster, fr fr ✨
• alias_pool — the pool of available client aliases. like a little alias lending library 🍓
• orig_addrs_lock — the mutex protecting orig_addrs. the second bouncer at the door 🫶
• orig_addrs_lock_key — the lock key for orig_addrs_lock. matching lanyard, obviously 💜
• orig_addrs — buffer used to store the original addresses during transmit. memory, but make it useful 🧚
• orig_addrs_size — the size of orig_addrs. we respect her dimensions, no cap 💀

lowkey the way this struct just holds everything together — a mutex, a lock key, a mutex, a lock key — it's giving matched set, it's giving organized 🌈

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⭐ SEE ALSO ⭐

if you liked this page, the kernel file at ./drivers/i2c/i2c-atr.c is the whole ecosystem, and these siblings ate too:

• struct i2c_atr_alias_pair(9)
• struct i2c_atr_alias_pool(9)
• struct i2c_atr(9)

iykyk, go read them, they're literally right there 💖✨

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and that's the page! this one lives over in ./drivers/i2c, dated October 2026 — so yes, this struct is a time traveler from the future, bow down 👑⭐💜 slay, bye bestie! 🦋🎀