cdns_uart_set_baud_rate(9)

💫 cdns_uart_set_baud_rate(9) 💫

okay bestie, so this is a page from the Kernel API Manual — yes, the kernel API manual, we're in the big leagues now — and the star of the show is cdns_uart_set_baud_rate. it does exactly what it says on the tin: it figures out your baud rate and then sets it. no cap, that's the whole vibe check. 🎀

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✨ NAME ✨

cdns_uart_set_baud_rate — calculate and set the baud rate 💅

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🌸 SYNOPSIS 🌸

unsigned int cdns_uart_set_baud_rate (struct uart_port *port , unsigned
int baud );

that's the whole signature, character for character. yes the line break is real, we don't fight the source. 🫶

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🦋 ARGUMENTS 🦋

• port — the handle to the uart port structure. it's your little portal to the port, iykyk.
• baud — the baud rate you actually want to set. your dream number, basically. ✨

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⭐ RETURN ⭐

so what comes back out? the baud rate:

• if it can give you the requested baud — you get the requested baud 🥳
• if the error is too much — you get the actual baud instead (the best it could do, and it's telling you)
• and if no valid divisors are found — you get zero. literally zero. the void. 💀

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🔥 SEE ALSO 🔥

okay this is the part where the whole friend group shows up, because they all live in the kernel file ./drivers/tty/serial/xilinx_uartps.c. say hi to everyone:

• struct cdns_uart(9)
• cdns_uart_handle_rx(9)
• cdns_rts_gpio_enable(9)
• cdns_rs485_tx_setup(9)
• cdns_rs485_rx_setup(9)
• cdns_uart_tx_empty(9)
• cdns_rs485_rx_callback(9)
• cdns_calc_after_tx_delay(9)
• cdns_uart_handle_tx(9)
• cdns_uart_isr(9)
• cdns_uart_calc_baud_divs(9)
• cdns_uart_clk_notifier_cb(9)
• cdns_rs485_tx_callback(9)
• cdns_uart_start_tx(9)
• cdns_uart_stop_tx(9)
• cdns_uart_stop_rx(9)
• cdns_uart_break_ctl(9)
• cdns_uart_set_termios(9)
• cdns_uart_startup(9)
• cdns_uart_shutdown(9)
• cdns_uart_type(9)
• cdns_uart_verify_port(9)
• cdns_uart_request_port(9)
• cdns_uart_release_port(9)
• cdns_uart_config_port(9)
• cdns_uart_get_mctrl(9)
• cdns_uart_console_putchar(9)
• cdns_uart_console_write(9)
• cdns_uart_console_setup(9)
• cdns_uart_suspend(9)
• cdns_uart_resume(9)
• cdns_rs485_config(9)
• cdns_uart_probe(9)
• cdns_uart_remove(9)

like, every single one of them. main character energy all around. 👑

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live in ./drivers/tty/serial and it's stamped October 2026 — the future is now, bestie. 🌈

and that's the page!! mwah, hope this slayed for you 💖🧚🍓