cdns_uart_set_termios(9)

💅 cdns_uart_set_termios(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for cdns_uart_set_termios — this is the termios glow-up function, and she is busy. 💖 She handles data length, parity, stop bits, flow control, and baud rate. Basically all the personality traits of your serial line, all at once. Iconic behaviour, no cap.

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🌸 NAME 🌸

cdns_uart_set_termios — the termios operations girlie: she's in charge of data length, parity, stop bits, flow control, and baud rate 🎀

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✨ SYNOPSIS ✨

void cdns_uart_set_termios (struct uart_port *port , struct ktermios
*termios , const struct ktermios *old );

note the void bestie — she does the work and gives you nothing back. queen behaviour honestly 👑

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🦋 ARGUMENTS 🦋

• port — handle to the uart port structure. this is the main character of the whole operation, the actual port you're re-styling 💅
• termios — handle to the input termios structure. this is the new fit she's trying on — the settings you actually want ✨
• old — values of the previously saved termios structure. the before pic 📸 so she can see what changed

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🔥 SEE ALSO 🔥

kernel file ./drivers/tty/serial/xilinx_uartps.c, plus the whole friend group — these are all literally in the same file, it's giving group chat:

• 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_set_baud_rate(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_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)

ok that's a lot of siblings but they're all valid, go say hi 🫶

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and that's the whole page bestie, ily for reading to the end 🌈 this one lives in ./drivers/tty/serial, dated October 2026, from the Kernel API Manual — mwah, go configure some uart 💜🎀