sht15_invalidate_voltage(9)

📦 version 7.3.1, in nixpkgs unstable

💅 sht15_invalidate_voltage(9) — kernel API manual, but make it make sense

okay so this is a page straight out of the Kernel API Manual, and it's about one tiny little notifier function in the sht15 driver fam. it's short, it's sweet, and it's lowkey doing something very smart. let's get into it 🫶

✨ NAME ✨

sht15_invalidate_voltage — mark supply voltage invalid when notified by reg 💀

like, the regulator hits you up, you go "say less, that voltage reading is sus now," and you flag it. that's the whole vibe check.

🌸 SYNOPSIS 🌸

int sht15_invalidate_voltage (struct notifier_block *nb , unsigned long
event , void *ignored );

returns an int, bestie. keep that in mind. ⭐

🎀 ARGUMENTS 🎀

  • nb — associated notification structure. this is your notifier block, the little handle that ties this callback to the thing that's pinging you 💌
  • event — voltage regulator state change event code. it tells you what just went down with the regulator 🔥
  • ignored — function parameter, ignored here. literally the name says it all, we're not touching it, it's decorative, main character energy but no lines 🙈

🦋 DESCRIPTION 🦋

okay so here's the tea, and it's actually important tea ☕

the notification code holds the regulator lock. so we cannot just go grab the supply voltage directly in here — that would be a whole mess. instead, we schedule an update of the supply voltage and let it get sorted out later.

no cap: this is a "don't block, don't deadlock, just queue it up" situation. respect the lock, queen 👑

💜 SEE ALSO 💜

Kernel file ./drivers/hwmon/sht15.c — that's the source of truth, go read it:

like, the whole sht15 extended universe is right there. binge the whole series iykyk 📚✨

🌈 sign-off 🌈

that's the page, bestie 🎀 this one lives down in ./drivers/hwmon, dated October 2026, and it's the sht15_invalidate_voltage(9) entry from the Kernel API Manual.

go forth, respect the regulator lock, and slay 💅💖

📦 where this page comes from