ENUM I3C_BUS_MODE(9)

💅 enum i3c_bus_mode(9) — I3C bus mode

okay bestie, welcome to the Kernel API Manual ✨ (yes that's the manual name, we're fancy here). this little page is all about enum i3c_bus_mode — the enum that tells you what kind of vibes your I3C bus is giving. let's get into it 🫶

---

✨ NAME ✨

enum i3c_bus_mode — I3C bus mode 💫

---

🌸 SYNOPSIS 🌸

here's the whole enum, verbatim, no cap:

enum i3c_bus_mode {
    I3C_BUS_MODE_PURE ,
    I3C_BUS_MODE_MIXED_FAST ,
    I3C_BUS_MODE_MIXED_LIMITED ,
    I3C_BUS_MODE_MIXED_SLOW

};

---

🎀 Constants 🎀

okay so these are the four modes, and tbh each one has its own whole personality 💅

• I3C_BUS_MODE_PURE — literally only I3C devices are connected to the bus. no limitation expected, it's giving clean, unbothered, main character energy 👑 no I2C weirdness to worry about.
• I3C_BUS_MODE_MIXED_FAST — there are I2C devices on the bus with a 50ns spike filter. the only impact in this mode? the high SCL pulse has to stay below 50ns so we can trick those I2C devices when transmitting I3C frames 😭 that's it, that's the whole constraint. sneaky but iconic.
• I3C_BUS_MODE_MIXED_LIMITED — I2C devices without a 50ns spike filter are present on the bus. but good news bestie, they allow compliance up to the maximum SDR SCL clock frequency ⭐ so we're not totally limited.
• I3C_BUS_MODE_MIXED_SLOW — I2C devices without a 50ns spike filter are present on the bus. periodt. that's the whole description, no extra lore 💀

---

🦋 SEE ALSO 🦋

the whole friend group lives in the kernel file ./include/linux/i3c/master.h — go say hi to all of them 💖

• 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_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)
• i3c_dev_set_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)

---

and that's the page, bestie 🧚💜 this one came from ./include/linux/i3c, dated October 2026 — so go forth and mode your bus correctly, iykyk 🌈🔥