STRUCT I2C_DEVICE_IDENTITY(9)

💖 struct i2c_device_identity(9) 💖

okay bestie, welcome to the Kernel API Manual moment ✨ this page is literally about struct i2c_device_identity, and its whole vibe is i2c client device identification. no cap. 🫶

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🌸 NAME 🌸

struct i2c_device_identity — i2c client device identification. that's the name, that's the game 💅

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✨ SYNOPSIS ✨

here's the exact struct, with every #define bestie intact, periodt:

struct i2c_device_identity {
    u16 manufacturer_id;
  #define I2C_DEVICE_ID_NXP_SEMICONDUCTORS                0;
  #define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_1              1;
  #define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_2              2;
  #define I2C_DEVICE_ID_NXP_SEMICONDUCTORS_3              3;
  #define I2C_DEVICE_ID_RAMTRON_INTERNATIONAL             4;
  #define I2C_DEVICE_ID_ANALOG_DEVICES                    5;
  #define I2C_DEVICE_ID_STMICROELECTRONICS                6;
  #define I2C_DEVICE_ID_ON_SEMICONDUCTOR                  7;
  #define I2C_DEVICE_ID_SPRINTEK_CORPORATION              8;
  #define I2C_DEVICE_ID_ESPROS_PHOTONICS_AG               9;
  #define I2C_DEVICE_ID_FUJITSU_SEMICONDUCTOR            10;
  #define I2C_DEVICE_ID_FLIR                             11;
  #define I2C_DEVICE_ID_O2MICRO                          12;
  #define I2C_DEVICE_ID_ATMEL                            13;
  #define I2C_DEVICE_ID_NONE                         0xffff;
    u16 part_id;
    u8 die_revision;
 };

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🎀 Members 🎀

three members, and they're all main characters in this little struct:

• manufacturer_id — 0 - 4095, and the database is maintained by NXP. iconic range, ngl 💖
• part_id — 0 - 511, according to manufacturer. yup, manufacturer's rules 🦋
• die_revision — 0 - 7, according to manufacturer. tiny but fierce 🌸

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🔗 SEE ALSO 🔗

bestie, the whole squad is here — first the kernel file ./include/linux/i2c.h, then all these icons:

• Kernel file ./include/linux/i2c.h
• i2c_master_recv(9)
• i2c_master_recv_dmasafe(9)
• i2c_master_send(9)
• i2c_master_send_dmasafe(9)
• enum i2c_driver_flags(9)
• struct i2c_driver(9)
• struct i2c_client(9)
• struct i2c_board_info(9)
• I2C_BOARD_INFO(9)
• struct i2c_algorithm(9)
• struct i2c_lock_operations(9)
• struct i2c_timings(9)
• struct i2c_bus_recovery_info(9)
• struct i2c_adapter_quirks(9)
• i2c_lock_bus(9)
• i2c_trylock_bus(9)
• i2c_unlock_bus(9)
• i2c_mark_adapter_suspended(9)
• i2c_mark_adapter_resumed(9)
• i2c_check_quirks(9)
• module_i2c_driver(9)
• builtin_i2c_driver(9)

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xoxo, your kernel bestie 💅 — source/version: ./include/linux, dated October 2026. mwah! 🎀💖