cdns_rs485_tx_callback(9)

💫 cdns_rs485_tx_callback — Kernel API Manual, section 9 ✨

okay so bestie, we're in the Kernel API Manual (section 9, the fun one) and today's main character is cdns_rs485_tx_callback. Yes it's a long name, yes it's giving "my parents let me pick my own name," but it's actually iconic 💅

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🌸 NAME 🌸

cdns_rs485_tx_callback — the timer tx callback handler for rs485. That's it, that's the whole vibe 🎀

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🦋 SYNOPSIS 🦋

enum hrtimer_restart cdns_rs485_tx_callback (struct hrtimer *t );

like… look at it. it returns an enum hrtimer_restart and takes exactly one thing. lowkey minimalist queen 👑

ngl copy the signature character-for-character, bestie — no "fixing" it, no renaming, no creative liberties. fr fr 🫶

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💖 ARGUMENTS 💖

• t — handle to the hrtimer structure ⏰ like, this is your timer, your little time guy, the whole reason you got called back. Hold it gently.

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🔥 SEE ALSO 🔥

okay so this is the part where the manpage just. lists everyone. the whole group chat. and bestie, we do not skip a single one — not one 🙈

the kernel file ./drivers/tty/serial/xilinx_uartps.c and its friends:

• 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_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… that's 34 entries. we counted. we listed. no cap, every single one made it 💀✨

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the cute lil sign-off 🫶

this page lives in ./drivers/tty/serial and it's dated October 2026 — so yes, it's from the future, and yes, it still ate 🌈⭐

k bye bestie, go handle that timer callback, i believe in you 💜🧚