i2c_atr_del_adapter(9)

💅 i2c_atr_del_adapter(9) — the Kernel API Manual moment ✨

okay so bestie, we're in the Kernel API Manual today and this page is literally about removing a downstream I2C bus. it's giving cleanup era. let's go 🎀

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🌸 NAME 🌸

i2c_atr_del_adapter — removes a child ("downstream") I2C bus that was added by i2c_atr_add_adapter(). and like, no cap: if no I2C bus has been added, this function is a no-op. it literally does nothing. iconique behavior, tbh 🦋

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✨ SYNOPSIS ✨

void i2c_atr_del_adapter (struct i2c_atr *atr , u32 chan_id );

that's it. that's the whole vibe check. 💖

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🫶 ARGUMENTS 🫶

• atr — the I2C ATR itself, your main character 🎀
• chan_id — the index of the adapter you want removed, and it lives in the range 0 .. max_adapters-1 (yes, off-by-one is real, respect the bounds bestie 💀)

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🔥 SEE ALSO 🔥

the kernel file ./include/linux/i2c-atr.h is where it all lives, and it's bringing the whole friend group:

• enum i2c_atr_flags(9)
• struct i2c_atr_ops(9)
• struct i2c_atr_adap_desc(9)
• i2c_atr_new(9)
• i2c_atr_delete(9)
• i2c_atr_add_adapter(9)
• i2c_atr_set_driver_data(9)
• i2c_atr_get_driver_data(9)

like, the whole squad is here. iykyk 🌈

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lowkey a reminder that i2c_atr_del_adapter() pairs with i2c_atr_add_adapter() — one adds, one removes. balance. harmony. the circle of kernel life 🧚

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okay that's the page!! sending u off with love from ./include/linux, dated October 2026, signed i2c_atr_del_adapter(9) — periodt, slay, go free your downstream bus 👑💜