cdns_uart_request_port(9)

💖 cdns_uart_request_port — the Kernel API Manual page, but make it make sense 💖

okay so bestie, we're in the Kernel API Manual today and this one's a little function with a big job. Buckle up 🎀

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✨ NAME ✨

cdns_uart_request_port — claim the memory region that's attached to a cdns_uart port. It gets called when the driver adds a cdns_uart port via uart_add_one_port(). like, it literally calls dibs on the memory. no cap. 🔥

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🌸 SYNOPSIS 🌸

int cdns_uart_request_port (struct uart_port *port );

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🦋 ARGUMENTS 🦋

• port — handle to the uart port structure 🫶 (yes that's the whole parameter list, she's low maintenance)

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⭐ RETURN ⭐

0 on success, negative errno otherwise. that's it. that's the whole vibe check 💅

ngl bestie, always check the return value — a negative errno is the function telling you something went sideways 🙈

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👑 SEE ALSO 👑

Kernel file ./drivers/tty/serial/xilinx_uartps.c and its whole friend group — honestly this is giving family reunion 😭💜

• 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_set_termios(9)
• cdns_uart_startup(9)
• cdns_uart_shutdown(9)
• cdns_uart_type(9)
• cdns_uart_verify_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)

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and that's the page, bestie!! 🧚‍♀️ slay 🍓

💀 little sign-off moment: this icon lives in ./drivers/tty/serial, dated October 2026, and the whole thing answers to the name cdns_uart_request_port(9). periodt. 💅✨