uart_console_write(9)

💖 uart_console_write(9) — Kernel API Manual 💖

okay so bestie, welcome to the uart_console_write(9) page ✨ this is from the Kernel API Manual and it's literally about writing a console message to a serial port, no cap 🫶

---

🎀 NAME 🎀

uart_console_write — write a console message to a serial port 💅

---

✨ SYNOPSIS ✨

void uart_console_write (struct uart_port *port , const char *s ,
unsigned int count , void (*putchar)(struct uart_port *, unsigned char)
);

like, that's the whole signature, keep it exactly like that bestie, don't touch it 🙈

---

🦋 ARGUMENTS 🦋

• port — the port to write the message to 💌 like, this is the serial port that's getting the message, main character energy fr
• s — array of characters 🌸 yep, the actual string-ish thing you're sending
• count — number of characters in string to write 🔢 literally the count, the amount, the number of chars, periodt
• putchar — function to write character to port ✨ this is the little callback that actually pushes each character out to the port, iconic

---

💜 SEE ALSO 💜

Kernel file ./drivers/tty/serial/serial_core.c — and honestly the whole friend group is here, so let's go 🎀:

• uart_write_wakeup(9)
• uart_update_timeout(9)
• uart_get_baud_rate(9)
• uart_get_divisor(9)
• uart_get_lsr_info(9)
• uart_parse_earlycon(9)
• uart_parse_options(9)
• uart_set_options(9)
• uart_change_pm(9)
• uart_register_driver(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)

like, read them all, iykyk 😭🔥

---

ngl bestie, there's no OPTIONS section here, no environment variables, no exit statuses — this page is short and sweet and that's that 💅 don't go looking for stuff that isn't there 🙈

---

and that's a wrap! 🌈 this page lives in ./drivers/tty/serial, dated October 2026, and it's filed under uart_console_write(9) — k bye, slay, go write some console messages to your serial port 💖✨🎀🦋