tty_port_reg..._attr_serdev(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 tty_port_reg..._attr_serdev(9) 🌸

okay bestie, welcome to the Kernel API Manual — yes, that's the manual name, and yes, this function name is genuinely a whole mouthful. we're registering a tty or a serdev device and honestly it's iconic behavior.

✨ NAME ✨

tty_port_register_device_attr_serdev — register a tty or serdev device, whichever one the vibes (and the parent) call for 💅

🎀 SYNOPSIS 🎀

struct device * tty_port_register_device_attr_serdev (struct tty_port
*port , struct tty_driver *driver , unsigned index , struct device *host
, struct device *parent , void *drvdata , const struct attribute_group
**attr_grp );

like, look at that signature. seven arguments. it's giving maximum parameter energy and i respect it 🫶

🦋 ARGUMENTS 🦋

  • port — the tty_port of the device. the main character of this whole situation, no cap.
  • driver — the tty_driver for this device. the one driving the bus 🚌
  • index — index of the tty. it's literally just the number, bestie.
  • host — the serial port hardware device. the actual physical realness 🌸
  • parent — parent, if one exists; otherwise NULL. lowkey optional. when it says optional it means it, so don't @ me if you pass a real one.
  • drvdata — driver data for the device. your little bag of stuff to carry around 🎀
  • attr_grp — attribute group for the device. it's const struct attribute_group **, so double pointer, don't get caught slipping 🙈

💖 DESCRIPTION 💖

okay so here's the tea: this function registers a serdev or a tty device — and which one you get depends entirely on whether the parent device has any defined serdev clients or not. that's it, that's the whole vibe check. parent's got serdev clients? serdev. it doesn't? tty. the parent decides, you just call the function ✨

👑 SEE ALSO 👑

kernel file ./drivers/tty/tty_port.c and, fr fr, the entire tty_port cinematic universe:

like, just read all of them. it's a whole saga and every single one ate 🔥

ngl bestie, read the source before you ship. this page tells you what the function does, not what happens if you mess it up — that part is between you and your kernel 😭

and that's the page!! sign-off time: this lil beauty lives in ./drivers/tty, dated October 2026, and it's still titled tty_port_reg..._attr_serdev(9) because the abbreviated name is iconic and we don't abbreviate it further 💜✨ go register something, slay, periodt 🎀

📦 where this page comes from