ismt_access(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ismt_access — process an SMBus command (in the Kernel API Manual, bestie)

okay so real talk, this one lives in the Kernel API Manual and it's literally the function that handles an SMBus command. one job, does it well, main character energy fr fr 💖

✨ NAME ✨

ismt_access — process an SMBus command 🫶

🌸 SYNOPSIS 🌸

int ismt_access (struct i2c_adapter *adap , u16 addr , unsigned short
flags , char read_write , u8 command , int size , union i2c_smbus_data
*data );

the way this signature just sits there being all type-y 😭 copy it exactly, no cap:

  • returns an int
  • takes seven things, and we're gonna go through every single one, periodt

🎀 ARGUMENTS 🎀

one bullet per argument, no skipping, that's the rule 👑

  • adap — the i2c host adapter 💫 like, the actual adapter doing the hosting, yk?
  • addr — address of the i2c/SMBus target 🎯 who we're talking to on the bus
  • flags — command options ⚙️ the little toggles that ride along with the command
  • read_write — read from or write to device 🔁 literally the direction check: are we pulling data out or pushing data in
  • command — the i2c/SMBus command to issue 📨 the actual command going out on the wire
  • size — SMBus transaction type 📏 tells you which flavour of SMBus transaction this is
  • data — read/write data buffer 🧺 where the data hangs out on the way in or the way out
no defaults listed here, bestie — the page doesn't give any, so i'm not inventing any 🙈

🦋 SEE ALSO 🦋

the Kernel file for all this is ./drivers/i2c/busses/i2c-ismt.c 📁 and it comes with a whole friend group of functions, all (9):

like, the whole iSMT cinematic universe 🌈 go read them, iykyk 💜

mwah 💋 that's the page! source is ./drivers/i2c/busses, dated October 2026, and this little beauty is ismt_access(9) — slay, go read a descriptor 🧚‍♀️✨

📦 where this page comes from