i2c_detect_slave_mode(9)

💅 i2c_detect_slave_mode(9) — like, the kernel API manual, but make it make sense 🎀

okay bestie, so this is a page from the Kernel API Manual (i2c_detect_slave_mode(9)), and honestly? it's a little baddie that just tells you whether an I2C device is out here living its slave era or not. no cap. let's get into it ✨

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🌸 NAME 🌸

i2c_detect_slave_mode — detect operation mode 👑

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🦋 SYNOPSIS 🦋

bool i2c_detect_slave_mode (struct device *dev );

that's it. one function, one argument, returns a bool. clean. iconic. 💅

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🎀 ARGUMENTS 🎀

• dev — the device that owns the bus 🫶 (like, the whole bus is its house, and we're checking who's actually picking up the phone at that address)

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⭐ DESCRIPTION ⭐

so what does it actually do? okay so — this function checks the device nodes for an I2C slave by looking at the address used in the reg property 🔍

if that address matches the I2C_OWN_SLAVE_ADDRESS flag, that means the device is configured to act as an I2C slave, and it will be listening at that address 👂✨ she's on the aux, she's taking calls, main character energy fr fr.

it returns true if an I2C own slave address is detected — otherwise it returns false 💀 (no slave era today, sorry bestie).

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💀 SEE ALSO 💀

• Kernel file ./drivers/i2c/i2c-core-slave.c — go read it, iykyk 📖🦋

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and that's the whole vibe check, bestie 💖 this page lives in ./drivers/i2c, dated October 2026 — mwah, slay, periodt 🎀✨👑