i3c_dev_set_master_data(9)

💅 i3c_dev_set_master_data — Kernel API Manual, bestie edition

okay so real talk, this is page i3c_dev_set_master_data(9) from the Kernel API Manual and it's genuinely so simple you're gonna wonder why you were stressed. let's get into it ✨

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🌸 NAME 🌸

i3c_dev_set_master_data — the glow-up where you attach master private data to an I3C device descriptor

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🦋 SYNOPSIS 🦋

void i3c_dev_set_master_data (struct i3c_dev_desc *dev , void *data );

like, that's the whole thing. no cap. 🎀

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💖 ARGUMENTS 💖

• dev — the I3C device descriptor you're attaching your private data to. this is the main character, the one getting the little gift 🎁
• data — the private data itself. it's a void *, so it's giving mystery, it's giving "i contain multitudes" — the kernel genuinely does not care what's in there, that's your business 🫶

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👑 DESCRIPTION 👑

so what does this bad boy actually do? it lets a master controller attach per-device private data to a device descriptor. that's it. that's the function. per-device, meaning each device gets its own little stash, not some shared group-chat situation 💅

and the whole point? once you've attached it, you can get it back later with i3c_dev_get_master_data. it's literally a set-and-get duo, they're a matching set, they ate 🔥

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🌈 SEE ALSO 🌈

okay this list is long long, so buckle up bestie, we're doing the full tour of ./include/linux/i3c/master.h and everyone who lives there 🧚

• Kernel file ./include/linux/i3c/master.h
• struct i3c_i2c_dev_desc(9)
• struct i2c_dev_boardinfo(9)
• struct i2c_dev_desc(9)
• struct i3c_ibi_slot(9)
• struct i3c_device_ibi_info(9)
• struct i3c_dev_boardinfo(9)
• struct i3c_dev_desc(9)
• struct i3c_device(9)
• enum i3c_bus_mode(9)
• enum i3c_open_drain_speed(9)
• enum i3c_addr_slot_status(9)
• struct i3c_bus(9)
• struct i3c_master_controller_ops(9)
• struct i3c_master_controller(9)
• i3c_bus_for_each_i2cdev(9)
• i3c_bus_for_each_i3cdev(9)
• struct i3c_dma(9)
• i3c_dev_get_master_data(9)
• i2c_dev_get_master_data(9)
• i2c_dev_set_master_data(9)
• i3c_dev_get_master(9)
• i2c_dev_get_master(9)
• i3c_master_get_bus(9)

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and that's the whole page, you're officially educated 💜 this lil gem lives in ./include/linux/i3c and the version on the menu is October 2026 — go forth and attach your data, icon behavior only 👑✨