uart_register_driver(9)

💖 uart_register_driver(9) 💖

okay so this is a page from the Kernel API Manual (section 9, bestie, the kernel-functions girly) and it's literally all about uart_register_driver 🎀

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✨ NAME ✨

uart_register_driver — the moment you officially register a driver with the uart core layer 👑

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🌸 SYNOPSIS 🌸

int uart_register_driver (struct uart_driver *drv );

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🦋 ARGUMENTS 🦋

• drv — the low level driver structure, aka the whole personality of your driver 🫶

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💜 DESCRIPTION 💜

So what you're doing here is registering a uart driver with the core driver. Like, introducing them. "core driver, meet my driver." iconic behavior honestly ✨

In turn, we register with the tty layer, and we initialise the core driver per-port state. yes bestie it's a whole chain of introductions, very main character energy 💅

There's a proc file in /proc/tty/driver and it's named after the normal driver — so your driver's name literally gets its own little corner of proc. obsessed 😭

real talk though: drv->port should be NULL, okay? and the per-port structures should be registered using uart_add_one_port after this call has succeeded. not before, not during, after. iykyk 🌈

Locking: none, Interrupts: enabled 🔥

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👑 SEE ALSO 👑

Kernel file ./drivers/tty/serial/serial_core.c, plus literally the whole friend group:

• uart_write_wakeup(9)
• uart_update_timeout(9)
• uart_get_baud_rate(9)
• uart_get_divisor(9)
• uart_get_lsr_info(9)
• uart_console_write(9)
• uart_parse_earlycon(9)
• uart_parse_options(9)
• uart_set_options(9)
• uart_change_pm(9)
• uart_unregister_driver(9)
• serial_core_add_one_port(9)
• serial_core_remove_one_port(9)
• uart_match_port(9)
• uart_handle_dcd_change(9)
• uart_handle_cts_change(9)
• uart_insert_char(9)
• uart_try_toggle_sysrq(9)
• uart_get_rs485_mode(9)

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okay that's the whole thing, go register your driver bestie, slay 💖✨🌸

sign-off era: this little gem lives in ./drivers/tty/serial, dated October 2026, and it's the uart_register_driver(9) page — no cap, that's the source and the date, mwah 🎀🫶💜