ixgbe_read_i2c_phy_82598(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ixgbe_read_i2c_phy_82598 — a Kernel API Manual moment

okay so bestie, we're in the Kernel API Manual today and the star of the show is ixgbe_read_i2c_phy_82598 💖

✨ NAME ✨

ixgbe_read_i2c_phy_82598 — Reads 8 bit word over I2C interface.

like, that's the whole vibe. it reads a thing. over I2C. we love a function with a clear purpose 🎀

🌸 SYNOPSIS 🌸

int ixgbe_read_i2c_phy_82598 (struct ixgbe_hw *hw , u8 dev_addr , u8
byte_offset , u8 *eeprom_data );

it returns an int, it takes four args, and yes the line break in the middle of the signature is just how it's printed, don't come for it 🫶

🦋 ARGUMENTS 🦋

  • hw — pointer to hardware structure. your hardware bestie. the whole device, basically 👑
  • dev_addr — address to read from
  • byte_offset — byte offset to read from dev_addr
  • eeprom_data — value read. this is where the good stuff lands, it's a pointer so it writes back out to you 💫

🌈 DESCRIPTION 🌈

so what does it actually do? it performs an 8 byte read operation to the SFP module's data over the I2C interface ✨

yes — the NAME says 8 bit word and the DESCRIPTION says 8 byte read, and we are reporting both exactly as the page says them because that is not my business to fix, that is the source's business 🙈 (iykyk — go read the C file if you're curious, the SEE ALSO has the path below 👇)

🔥 SEE ALSO 🔥

the kernel file lives right here, go off:

./drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c

and the whole friend group, alphabetically-ish, all present and accounted for:

twenty-two besties. a whole group chat. the _82598 suffix is iconic and they all committed to it 💅

lowkey, if you're poking at the 82598 driver, read the siblings above before you go changing anything — some of them set up state that this one assumes exists. no cap, don't skip the setup calls 🙏

that's the page!! it's from the Kernel API Manual, source path got truncated to ./drivers/net/ethernet/intel/i... in the footer, and the date stamp is October 2026 — so when you cite it, cite it with the right month girlie 🗓️💜 slay, bye! 🧚✨

📦 where this page comes from