uart_parse_options(9)

💅 uart_parse_options — the kernel API manual, bestie edition ✨

Okay so this is uart_parse_options(9) from the Kernel API Manual, and honestly? She's a little legend. Let's get into it 🫶

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🌸 NAME 🌸

uart_parse_options — literally just parse the serial port baud/parity/bits/flow control, no cap 💖

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✨ SYNOPSIS ✨

void uart_parse_options (const char *options , int *baud , int *parity ,
int *bits , int *flow );

That's the whole vibe. void return, so she does her thing and doesn't report back — she just fills in your ints 🎀

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🦋 ARGUMENTS 🦋

• options — pointer to the option string. This is the main character, the string she's about to decode 👑
• baud — pointer to an int variable for the baud rate ⭐
• parity — pointer to an int variable for the parity ✨
• bits — pointer to an int variable for the number of data bits 🌈
• flow — pointer to an int variable for the flow control character 💅

All of them are pointers, so she's writing through them — hand her the addresses and she'll fill them in, fr fr.

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💜 DESCRIPTION 💜

So uart_parse_options decodes a string containing the serial console options — that's her whole job, and she ate 💅

The format of the string is <baud><parity><bits><flow>, eg:

115200n8r

Like, read it as one cute little package: the baud rate, then the parity letter, then the number of data bits, then the flow control character. 115200n8r is the example straight from the source, so don't @ me. iykyk 🔥

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🎀 SEE ALSO 🎀

Kernel file ./drivers/tty/serial/serial_core.c — that's where she lives, go say hi 🧚

And the whole friend group, because serial_core is a scene:

• 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_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)

Twenty of them. Yes I counted. Not me being thorough or anything 🙈

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💀 Quick vibe check: this page has no exit status, no environment variables, no warnings, aka no bug notes, and no errors listed. She's a simple girl. Don't go inventing drama that isn't in the docs, bestie.

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🍓 Sign-off 🍓

This masterpiece of a manpage comes from ./drivers/tty/serial, dated October 2026, and it's all about uart_parse_options(9) — okay bye, go parse some options, slay 💖🌸✨