tty_register_device(9)

🎀 NAME 🎀

tty_register_device(9) — register a tty device. Okay so this is from the Kernel API Manual, and yes bestie, we’re about to make one individual tty device official. ✨

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🌸 SYNOPSIS 🌸

struct device * tty_register_device (struct tty_driver *driver ,
unsigned index , struct device *device );

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🦋 ARGUMENTS 🦋

• driver — the tty driver that describes the tty device. This is the driver bestie, the one doing the describing.
• index — the index in the tty driver for this tty device. It’s giving “which one in the lineup,” iykyk.
• device — a struct device that is associated with this tty device. This field is optional; if there is no known struct device for this tty device, it can be set to NULL safely. No cap, NULL is allowed here. 🫶

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🔥 DESCRIPTION 🔥

This call is required to be made to register an individual tty device if the tty driver’s flags have the TTY_DRIVER_DYNAMIC_DEV bit set. If that bit is not set, this function should not be called by a tty driver. Like, put it down and back away slowly, that’s not your moment. 💅

Locking: ??

Yes, the page literally says ?? for locking. That’s the whole vibe. Not me making it up, bestie. 😭

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💜 RETURN 💜

A pointer to the struct device for this tty device — or ERR_PTR(-EFOO) on error. So you either get your cute little device pointer or the error-flavored one. Periodt.

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🌈 SEE ALSO 🌈

• Kernel file: ./drivers/tty/tty_io.c
• The whole function squad: free_tty_struct(9), tty_free_file(9), tty_name(9), get_tty_driver(9), tty_dev_name_to_number(9), tty_find_polling_driver(9), tty_wakeup(9), tty_release_redirect(9), __tty_hangup(9), tty_hangup(9), tty_vhangup(9), tty_vhangup_self(9), tty_vhangup_session(9), tty_hung_up_p(9), stop_tty(9), start_tty(9), tty_read(9), tty_write(9), tty_send_xchar(9), pty_line_name(9), tty_line_name(9), tty_driver_lookup_tty(9), tty_init_termios(9), tty_standard_install(9), tty_driver_install_tty(9), tty_driver_remove_tty(9), tty_reopen(9), tty_init_dev(9), tty_save_termios(9), tty_flush_works(9), release_one_tty(9), tty_kref_put(9), release_tty(9), tty_release_checks(9), tty_kclose(9), tty_release_struct(9), tty_release(9), tty_open_current_tty(9), tty_lookup_driver(9), tty_kopen_exclusive(9), tty_kopen_shared(9), tty_open_by_driver(9), tty_open(9), tty_poll(9), tiocsti(9), tiocgwinsz(9), tty_do_resize(9), tiocswinsz(9), tioccons(9), tiocsetd(9), tiocgetd(9), send_break(9), tty_get_tiocm(9), tty_tiocmget(9), tty_tiocmset(9), tty_get_icount(9), alloc_tty_struct(9), tty_put_char(9), tty_register_device_attr(9), tty_unregister_device(9), __tty_alloc_driver(9), tty_driver_kref_put(9), tty_register_driver(9), tty_unregister_driver(9)

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Okay that’s the page, bestie — source/version ./drivers/tty, dated October 2026. Byeeee 🫶🎀