tpm_cr50_i2...t_and_status(9)

📦 version 7.3.1, in nixpkgs unstable

💅 NAME 💅

tpm_cr50_i2c_get_burst_and_status — okay so this one grabs the burst count and the status for you, bestie. Two for one, we love a multitasker ✨

This little cutie lives in the Kernel API Manual, and yes the page name is the whole entire tpm_cr50_i2...t_and_status(9) situation — it's long, it's iconic, it's giving "my name is a paragraph" energy 🎀

✨ SYNOPSIS ✨

int tpm_cr50_i2c_get_burst_and_status (struct tpm_chip *chip , u8 mask ,
size_t *burst , u32 *status );

That's the whole vibe check right there — one function, four things going in, an int coming back out 🫶

🌸 ARGUMENTS 🌸

  • chip — a TPM chip. that's it, that's the whole description. she's a TPM chip 💅
  • mask — the status mask. yes queen, filter those bits 👑
  • burst — nope, not an input — this is where the burst value gets returned to you 📤
  • status — same deal, this pointer is the return value for status, not something you feed in 📤

🦋 DESCRIPTION 🦋

okay so here's the lore: cr50 uses bytes 3:2 of the status register to hold the burst count.

and because of that whole arrangement, all 4 bytes must be read. all four. no skipping, no shortcuts, no "I'll just grab the two I need" bestie behavior 🙈 it literally does not work like that.

⭐ RETURN ⭐

  • 0 — success! slay! we ate and left no crumbs 💖
  • -errno — a POSIX error code. so like, something went sideways, and it's telling you in the classic POSIX way 😭

🌈 SEE ALSO 🌈

okay this is the friend group, they all show up together, iykyk:

Kernel file ./drivers/char/tpm/tpm_tis_i2c_cr50.c

and that's the page!! 💜 this one comes straight out of ./drivers/char/tpm, dated October 2026, and honestly? she's short, she's sweet, she's a whole snack. go read the friend group above if you want the full cinematic universe 🍓🧚

📦 where this page comes from